This document discusses coal mining methods, including their advantages and disadvantages. It describes surface mining methods like opencast mining and underground mining techniques. Surface mining is cheaper but has disadvantages like disturbing overburden and creating unstable spoil tips. Underground mining can access deeper seams but is more expensive, inflexible, and dangerous due to risks of gas, dust, fires and roof collapses. The document also outlines the history of coal mining and various techniques used over time.
The document discusses various methods of coal mining including surface mining techniques like strip mining and underground mining methods like bord and pillar and longwall mining. It outlines the history of coal mining and describes key steps in coal exploration. Factors that influence the selection of mining methods include the thickness and depth of coal seams, geology, roof and floor characteristics, and methane gas levels. The document concludes that coal forms from plant remains over geological time periods and that mining techniques have advanced with increased mechanization and automation.
This document discusses coal mining methods. It begins with an introduction and overview of the history of coal mining. It then describes and compares various surface mining techniques like strip mining and horizon mining as well as underground mining methods like bord and pillar, longwall and shortwall. Factors that influence the selection of mining methods and latest developments in coal mining techniques are also summarized. The conclusion restates that coal is an important energy source and mining methods continue to evolve and improve.
C O A L A N D I T S A V A I L A B I L I T Y 1Jayanta Bora
The document discusses coal, how it is formed, types of coal, coal mining methods, and coal usage. Key points:
- Coal is a combustible rock formed from compressed plant matter that lived hundreds of millions of years ago.
- There are several types of coal defined by their carbon content, including anthracite, bituminous, sub-bituminous, and lignite.
- Coal is mined through underground methods like shaft mining or surface methods like mountaintop removal.
- India's coal reserves and production have increased in recent decades to support its growing electricity needs.
Coal Mines How and where are coal mines found in Chhattisgarh Basically, the coal mine of Vishrampur is shown in this, which is spread in its area of Bishrampur or South of Chhattisgarh.
There is coal mine in south east along with it there is also coal mine in Parsa Amira .
Coal mine is basically of 2 types open casting and underground coal mine. Coal mine of Vishrampur both type.
Both types of coal come under the category of mines, in which first open casting is done, after that the underground coal itself comes in different types of coal mines in different districts of Chhattisgarh. There is a coal mine, it has seen different types of uses such as in the food industry, in the cement industry, in the three industries, in the bauxite industry, in the sugarcane industry, as well as in the iron industry.
Coal There are four types of coal, which are shown in the following way in this article,
so you read and understand this article and how did you like it, definitely write in the comment thank you.
COAL Union of Concerned ScientistsContents· How Coal Was.docxclarebernice
COAL: Union of Concerned Scientists
Contents
· How Coal Was Formed
· How Coal is Mined
· Where Our Coal Comes From
· How Coal is Transported and Processed
· How Coal is Burned
· Environmental and Public Health Impacts of Coal
· The Future of Coal
Many people think coal represents a bygone way of life and that America has moved on to safer and cleaner energy sources. On the contrary, coal provides roughly half the nation’s electricity—far more than any other source of power—and our coal use has nearly tripled since 1960. Our coal use will continue to expand if the power industry succeeds in building the many power plants it has proposed for construction.
Coal’s proponents claim coal power is cheap. While the direct price of electricity from the nation’s aging fleet of coal plants may be low, it doesn’t reflect the staggering and lasting costs of coal-related air and water pollution, mining accidents, permanently altered landscapes, and, most importantly, climate change. Even the newest proposed plants – which would cost far more than existing plants—would have major impacts on air and water quality, and almost the same mining and climate impacts as existing plants.
Technology is evolving that has the potential to substantially reduce coal’s contribution to global warming by capturing carbon emissions before they are emitted. This technology could become an important part of the battle against global warming, but it remains to be seen whether it will work at a commercial scale and at what cost.
Meanwhile, a 2009 UCS study found that we can dramatically reduce our coal use—and all the environmental and social costs associated with it—while saving energy consumers money with policies that aggressively promote energy efficiency and renewable power.
How Coal Was Formed
Coal was formed when dead plant matter submerged in swamp environments was subjected to geological forces of heat and pressure over hundreds of millions of years. As time went by, the plant matter evolved from moist and low-carbon peat, to coal, which is much higher in energy and carbon content. Coal itself has a wide variation in properties, so it is categorized into 4 ranks—lignite, sub-bituminous, bituminous, and anthracite—in order of increasing carbon and energy content. Most of the coal burned in U.S. power plants is of the bituminous or subbituminous variety.
Figure 1: The Process of Coal Formation (Source: KGS)
Coal of all types can vary widely in the amount of sulfur contained. These differences are determined by the conditions under which the coal formed. Low-sulfur coal deposits formed in a freshwater environment, while those containing higher proportions of sulfur developed in brackish swamps or marine-influenced environments.[1] In the United States, the sulfur content of coal resources varies along geographic lines, with most of the eastern coal containing high levels of sulfur, and the younger western coal containing much less.
How Coal is Mined
In 2 ...
KFJ Steel is a company that manufactures machinery and equipment for mining and mineral processing. It has been in operation since 1984 and produces items such as conveyors, crushers, fans, and kilns. Mining involves extracting valuable minerals and materials from the earth and can be done through surface or underground methods. Surface mining removes material from an open pit while underground mining involves digging tunnels or shafts. Once extracted, minerals often need to be processed to separate the valuable components from waste material using techniques like crushing, grinding, and washing. The global mining industry is a major economic activity, with some of the largest mining companies based in countries like South Africa, Canada, Australia, and Brazil.
This document provides an overview of a course on energy resources and utilization. The course covers fossil energy resources like oil, gas, and coal, as well as renewable energy resources including solar, wind, hydropower, biomass, and geothermal. It discusses production and consumption trends for different fossil fuels. Key topics covered include fossil fuel formation processes, reserves, extraction technologies, transportation and applications such as electricity generation and steel production. The environmental impacts of fossil fuel usage and clean coal technologies are also summarized.
This document provides an introduction and overview of Dr. Andrew Cox's Coal Lectures Series. The series covers topics related to coal formation, properties, use as a fuel, mining technologies, markets, pollution control, and more. Dr. Cox and his colleagues at EIMR are available to provide lectures and teaching on these topics to universities and professional development courses both in the UK and internationally. Interested parties should contact Dr. Cox for more information. An introductory presentation on coal mining technologies is also included as an example of the type of material covered.
The document discusses various methods of coal mining including surface mining techniques like strip mining and underground mining methods like bord and pillar and longwall mining. It outlines the history of coal mining and describes key steps in coal exploration. Factors that influence the selection of mining methods include the thickness and depth of coal seams, geology, roof and floor characteristics, and methane gas levels. The document concludes that coal forms from plant remains over geological time periods and that mining techniques have advanced with increased mechanization and automation.
This document discusses coal mining methods. It begins with an introduction and overview of the history of coal mining. It then describes and compares various surface mining techniques like strip mining and horizon mining as well as underground mining methods like bord and pillar, longwall and shortwall. Factors that influence the selection of mining methods and latest developments in coal mining techniques are also summarized. The conclusion restates that coal is an important energy source and mining methods continue to evolve and improve.
C O A L A N D I T S A V A I L A B I L I T Y 1Jayanta Bora
The document discusses coal, how it is formed, types of coal, coal mining methods, and coal usage. Key points:
- Coal is a combustible rock formed from compressed plant matter that lived hundreds of millions of years ago.
- There are several types of coal defined by their carbon content, including anthracite, bituminous, sub-bituminous, and lignite.
- Coal is mined through underground methods like shaft mining or surface methods like mountaintop removal.
- India's coal reserves and production have increased in recent decades to support its growing electricity needs.
Coal Mines How and where are coal mines found in Chhattisgarh Basically, the coal mine of Vishrampur is shown in this, which is spread in its area of Bishrampur or South of Chhattisgarh.
There is coal mine in south east along with it there is also coal mine in Parsa Amira .
Coal mine is basically of 2 types open casting and underground coal mine. Coal mine of Vishrampur both type.
Both types of coal come under the category of mines, in which first open casting is done, after that the underground coal itself comes in different types of coal mines in different districts of Chhattisgarh. There is a coal mine, it has seen different types of uses such as in the food industry, in the cement industry, in the three industries, in the bauxite industry, in the sugarcane industry, as well as in the iron industry.
Coal There are four types of coal, which are shown in the following way in this article,
so you read and understand this article and how did you like it, definitely write in the comment thank you.
COAL Union of Concerned ScientistsContents· How Coal Was.docxclarebernice
COAL: Union of Concerned Scientists
Contents
· How Coal Was Formed
· How Coal is Mined
· Where Our Coal Comes From
· How Coal is Transported and Processed
· How Coal is Burned
· Environmental and Public Health Impacts of Coal
· The Future of Coal
Many people think coal represents a bygone way of life and that America has moved on to safer and cleaner energy sources. On the contrary, coal provides roughly half the nation’s electricity—far more than any other source of power—and our coal use has nearly tripled since 1960. Our coal use will continue to expand if the power industry succeeds in building the many power plants it has proposed for construction.
Coal’s proponents claim coal power is cheap. While the direct price of electricity from the nation’s aging fleet of coal plants may be low, it doesn’t reflect the staggering and lasting costs of coal-related air and water pollution, mining accidents, permanently altered landscapes, and, most importantly, climate change. Even the newest proposed plants – which would cost far more than existing plants—would have major impacts on air and water quality, and almost the same mining and climate impacts as existing plants.
Technology is evolving that has the potential to substantially reduce coal’s contribution to global warming by capturing carbon emissions before they are emitted. This technology could become an important part of the battle against global warming, but it remains to be seen whether it will work at a commercial scale and at what cost.
Meanwhile, a 2009 UCS study found that we can dramatically reduce our coal use—and all the environmental and social costs associated with it—while saving energy consumers money with policies that aggressively promote energy efficiency and renewable power.
How Coal Was Formed
Coal was formed when dead plant matter submerged in swamp environments was subjected to geological forces of heat and pressure over hundreds of millions of years. As time went by, the plant matter evolved from moist and low-carbon peat, to coal, which is much higher in energy and carbon content. Coal itself has a wide variation in properties, so it is categorized into 4 ranks—lignite, sub-bituminous, bituminous, and anthracite—in order of increasing carbon and energy content. Most of the coal burned in U.S. power plants is of the bituminous or subbituminous variety.
Figure 1: The Process of Coal Formation (Source: KGS)
Coal of all types can vary widely in the amount of sulfur contained. These differences are determined by the conditions under which the coal formed. Low-sulfur coal deposits formed in a freshwater environment, while those containing higher proportions of sulfur developed in brackish swamps or marine-influenced environments.[1] In the United States, the sulfur content of coal resources varies along geographic lines, with most of the eastern coal containing high levels of sulfur, and the younger western coal containing much less.
How Coal is Mined
In 2 ...
KFJ Steel is a company that manufactures machinery and equipment for mining and mineral processing. It has been in operation since 1984 and produces items such as conveyors, crushers, fans, and kilns. Mining involves extracting valuable minerals and materials from the earth and can be done through surface or underground methods. Surface mining removes material from an open pit while underground mining involves digging tunnels or shafts. Once extracted, minerals often need to be processed to separate the valuable components from waste material using techniques like crushing, grinding, and washing. The global mining industry is a major economic activity, with some of the largest mining companies based in countries like South Africa, Canada, Australia, and Brazil.
This document provides an overview of a course on energy resources and utilization. The course covers fossil energy resources like oil, gas, and coal, as well as renewable energy resources including solar, wind, hydropower, biomass, and geothermal. It discusses production and consumption trends for different fossil fuels. Key topics covered include fossil fuel formation processes, reserves, extraction technologies, transportation and applications such as electricity generation and steel production. The environmental impacts of fossil fuel usage and clean coal technologies are also summarized.
This document provides an introduction and overview of Dr. Andrew Cox's Coal Lectures Series. The series covers topics related to coal formation, properties, use as a fuel, mining technologies, markets, pollution control, and more. Dr. Cox and his colleagues at EIMR are available to provide lectures and teaching on these topics to universities and professional development courses both in the UK and internationally. Interested parties should contact Dr. Cox for more information. An introductory presentation on coal mining technologies is also included as an example of the type of material covered.
This document provides an introduction and overview of Dr. Andrew Cox's Coal Lectures Series. The series covers topics related to coal formation, properties, use as a fuel, mining technologies, markets, pollution control, and more. Dr. Cox and colleagues at EIMR can provide lectures on these topics to university courses and professional development programs in the UK and internationally. Interested parties should contact Dr. Cox for more information. An introductory presentation on coal mining technologies is also included as an example of the type of material covered.
Mining provides many natural resources that are essential for modern life such as iron, coal, salt, gold and other minerals. There are different types of mining including surface mining techniques like open-pit and strip mining as well as hardrock mining which involves digging shafts and tunnels underground. Modern mines are required to reclaim the land after mining is complete to restore it and protect wildlife habitats and the environment.
1. The document discusses different types of mining including surface mining techniques like placer mining, strip mining, mountaintop removal, and hydraulic mining. It also discusses underground mining techniques like drift mining, slope mining, and shaft mining.
2. Mining can have negative environmental impacts like deforestation, pollution from tailings dams, subsidence from underground coal mining, and dispersal of heavy metals and asbestos.
3. Mining also causes social damages like appropriation of indigenous lands, health impacts, changes to social relationships and regional cultures, and displacement of local communities and economies. The case study of Sukinda valley in India shows large negative health impacts from chromite mining pollution.
This document summarizes the environmental impacts of coal mining. It discusses two main coal mining methods: surface/strip mining and underground mining. Strip mining destroys landscapes, forests, and wildlife habitats by clearing trees and topsoil. Underground mining causes subsidence as mines collapse and lowers water tables. Both methods generate waste, pollution, and greenhouse gas emissions. Coal mining has significant health impacts on local communities from lung diseases and water contamination. India has large coal reserves and coal remains an important energy source, but increased mining raises environmental concerns.
The document provides information about training conducted at Tipong Colliery, an underground coal mine in Assam, India. It discusses the mine's location, history of operations since 1924 using various mining methods, geology of coal seams, current facilities, development plans, and manpower requirements. The mine extracts coal from the 60-foot and 20-foot seams using manual methods like pick mining and plans to mechanized development to reach deeper levels and extract more reserves.
1. Mining involves extracting valuable minerals and materials from the earth. Common methods are surface mining, which removes overburden, and underground mining using shafts or tunnels.
2. Surface mining techniques include placer mining for deposits close to the surface, strip mining which removes overburden, and mountaintop removal which levels entire mountains. Underground mining uses drifts, slopes, or shafts to access deep materials.
3. Mining has environmental impacts like deforestation, pollution from tailings, subsidence from underground mining, and dispersal of heavy metals and asbestos. It can also damage communities through land appropriation, health impacts, and social disruption.
Designing blast free opencast coal mine a socio-eco-efficient production systemPawan Kumar Singh
Breaking of sandstone or other rocks overlying coal seams as well as coal seams in opencast coal mines
is essentially required for ease in excavation. The process of breaking rocks normally involves drilling and blasting.
Coal mining industry world over, for all its importance and contribution to the energy sector, is viewed with scepticism
for its impacts on environment and society. Apart from other processes, blasting of rocks with explosives is a major
contributor to originate several evils of coal mining like emission of noxious gases, high speed dust and fly rocks, heat,
and noise and ground vibrations. Moreover, what miners get after blasting is rock wastes, lumpy coal and sometimes
quality of coal also gets deteriorated due to mixing of rock wastes in blasted coal. Waste dumps also create long-term
environmental problems. This paper develops a new methodology to generate sustainable value in opencast coal mining
significantly increasing the inextricably-linked demand of production systems, by way of designing blast-free opencast
coal mines. Mechanical method of cutting and breaking the overlying rocks and coal seams as well can replace the
prevalent practice of blasting with explosives. An experiment of the designed method has been conducted using locally
made simple tools and a comparative study was made to examine the benefits of the design over the prevalent practice.
The method is found socio-eco-effective, economically viable and provides new business opportunity. There appears
substantial prospect for applicability of the design in coal mining industry, and it deserves a high potential to become a
brand CSR practice on the industry to benefit the society and improve sustainability.
This document provides an overview of open-pit mining basics. It discusses that open-pit mining, also called surface mining, extracts ore or minerals from the ground without tunneling underground. The document outlines the two main types of mining as surface mining and subsurface mining. It also provides details on open-pit mining methods, factors for selecting mining methods, advantages and disadvantages of open-pit mining, and the key operations involved in open-pit mining.
A review of highwall mining experience and practiceaussiexp
This document provides a review of highwall mining experience and practices. It discusses the history and development of highwall mining, primarily in the United States and Australia. Two main highwall mining systems are described - continuous highwall mining (CHM) and auger mining. CHM systems can penetrate deeper and be more productive. Geotechnical considerations for highwall mining panel design are also reviewed, including web and barrier pillar stability, roof stability in mined entries, and highwall stability. Water inflows and methane levels are additional factors that can impact highwall mining operations. Overall, the document aims to summarize the history and current state of highwall mining while highlighting important geotechnical design considerations.
This document provides information about various aspects of mineral resources and mining. It discusses three current boom employers for geologists: mineral resources and mining, the petroleum industry, and the environmental industry. It then covers definitions and terms related to mineral resources. It outlines the steps involved in obtaining mineral commodities, from prospecting through refining and transportation. Finally, it notes that mining is an economic activity and the decision to mine depends on an analysis of costs, benefits, and risks.
Lecture 10 Mineral Resources and Mining s.pptMajidKhan858527
This document discusses mineral resources and mining. It covers several topics including the different industries that employ geologists, important ore types and deposits, steps involved in obtaining mineral commodities from prospecting through refining, factors that influence whether to mine a deposit, and various mining and processing techniques. Key employment centers for geologists include the mineral resources and mining industry, petroleum industry, and environmental industry.
The effects of Coal Mining on our environment and us humans and how it disrupt cycles on Earth biologically, geologically, and chemically. ( BIOGEOCHEMICAL CYCLES ) Examples is the Semirara Island in the Philippines.
This document summarizes the process of oil and gas exploration. It discusses how oil and gas deposits are formed over millions of years, and the characteristics needed for reservoirs to trap hydrocarbons underground. Surveys including geological analysis and seismic surveys are used to identify potential reservoir locations. Exploration wells are then drilled to test formations, and core samples and logging provide data on the resource. If oil or gas is found, further appraisal wells evaluate the reservoir extent and productivity.
This presentation discusses open pit and underground mining methods. Open pit mining involves extracting rock and minerals from the surface, has advantages like safety and equipment simplicity but requires large land areas and leaves noise and dust pollution. Underground mining uses tunneling techniques, allows deeper extraction while limiting environmental impact but is more complex, dangerous and inefficient. The Khalashpir coal field in Bangladesh is described as having 8 coal seams up to 16.9 meters thick, with proven reserves of 685 million tons, and is planned to use longwall mining given seam thickness.
Cement refers to the commodities that are produced by burning mixtures of limestone and other
minerals or additives at high temperature in a rotary kiln, followed by cooling, finish mixing, and
grinding. This is the manner in which the vast majority of commercially-important cementations
materials are produced in the United States. Cements are used to chemically bind different
materials together. The most commonly produced cement type is "Portland" cement, though
other standard cement types are also produced on a limited basis.
Cement plants produced 99.8 million metric tons of cement. Worldwide production accounted
for about 2.5 billion metric tons. As with most large manufacturing industries, by-product
materials are generated. These industrial by-product and waste materials must be managed
responsibly to insure a clean and safe environment.
Coal mining can negatively impact the environment through air, water, land, noise, and solid waste pollution. Steps are taken to minimize these impacts, including careful planning, pollution control measures, environmental monitoring, and site rehabilitation. However, coal mining remains an important industry that contributes to economies and development by providing energy, jobs, and revenues, especially in developing countries. Mitigation efforts aim to maximize the value of coal production while reducing negative environmental consequences through practices like land rehabilitation, water treatment, and dust suppression.
Mining (ore minerals and lessening the impact of mining)Jason Alcano
The document discusses the extraction of minerals from ores. It defines what an ore is and describes the different types of ore deposits based on their formation process. It then explains various mining and processing techniques used to extract the desired mineral from the ore, including surface mining methods like open-pit and strip mining, and subsurface mining. Finally, it outlines some key processes used in mineral extraction like leaching, smelting, and roasting.
Piping is used to transport liquids, gases, and solids between locations. Pipes have a nominal bore diameter and wall thickness specified by a schedule number according to standards. Piping is key infrastructure for industries like power plants, oil and gas, refineries, and more. Offshore platforms explore for and produce oil and gas from the seafloor. They operate in shallow, deep, and ultra-deep water. Offshore processes include exploration using seismic surveys, drilling wells, and production including infrastructure that withstands harsh ocean conditions.
This document discusses coal mining methods. It describes the objectives of coal prospecting and exploration. There are two main mining methods: underground and surface mining. The choice depends on factors like depth below surface and ore body shape and grade. Underground mining is used when the deposit is deep or the ore body is steep. It involves cutting rooms into the coal seam. Surface mining is used for large, high production deposits where the overburden is thin. It involves clearing vegetation, removing topsoil, drilling, blasting, and reclaiming the land.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
This document provides an introduction and overview of Dr. Andrew Cox's Coal Lectures Series. The series covers topics related to coal formation, properties, use as a fuel, mining technologies, markets, pollution control, and more. Dr. Cox and colleagues at EIMR can provide lectures on these topics to university courses and professional development programs in the UK and internationally. Interested parties should contact Dr. Cox for more information. An introductory presentation on coal mining technologies is also included as an example of the type of material covered.
Mining provides many natural resources that are essential for modern life such as iron, coal, salt, gold and other minerals. There are different types of mining including surface mining techniques like open-pit and strip mining as well as hardrock mining which involves digging shafts and tunnels underground. Modern mines are required to reclaim the land after mining is complete to restore it and protect wildlife habitats and the environment.
1. The document discusses different types of mining including surface mining techniques like placer mining, strip mining, mountaintop removal, and hydraulic mining. It also discusses underground mining techniques like drift mining, slope mining, and shaft mining.
2. Mining can have negative environmental impacts like deforestation, pollution from tailings dams, subsidence from underground coal mining, and dispersal of heavy metals and asbestos.
3. Mining also causes social damages like appropriation of indigenous lands, health impacts, changes to social relationships and regional cultures, and displacement of local communities and economies. The case study of Sukinda valley in India shows large negative health impacts from chromite mining pollution.
This document summarizes the environmental impacts of coal mining. It discusses two main coal mining methods: surface/strip mining and underground mining. Strip mining destroys landscapes, forests, and wildlife habitats by clearing trees and topsoil. Underground mining causes subsidence as mines collapse and lowers water tables. Both methods generate waste, pollution, and greenhouse gas emissions. Coal mining has significant health impacts on local communities from lung diseases and water contamination. India has large coal reserves and coal remains an important energy source, but increased mining raises environmental concerns.
The document provides information about training conducted at Tipong Colliery, an underground coal mine in Assam, India. It discusses the mine's location, history of operations since 1924 using various mining methods, geology of coal seams, current facilities, development plans, and manpower requirements. The mine extracts coal from the 60-foot and 20-foot seams using manual methods like pick mining and plans to mechanized development to reach deeper levels and extract more reserves.
1. Mining involves extracting valuable minerals and materials from the earth. Common methods are surface mining, which removes overburden, and underground mining using shafts or tunnels.
2. Surface mining techniques include placer mining for deposits close to the surface, strip mining which removes overburden, and mountaintop removal which levels entire mountains. Underground mining uses drifts, slopes, or shafts to access deep materials.
3. Mining has environmental impacts like deforestation, pollution from tailings, subsidence from underground mining, and dispersal of heavy metals and asbestos. It can also damage communities through land appropriation, health impacts, and social disruption.
Designing blast free opencast coal mine a socio-eco-efficient production systemPawan Kumar Singh
Breaking of sandstone or other rocks overlying coal seams as well as coal seams in opencast coal mines
is essentially required for ease in excavation. The process of breaking rocks normally involves drilling and blasting.
Coal mining industry world over, for all its importance and contribution to the energy sector, is viewed with scepticism
for its impacts on environment and society. Apart from other processes, blasting of rocks with explosives is a major
contributor to originate several evils of coal mining like emission of noxious gases, high speed dust and fly rocks, heat,
and noise and ground vibrations. Moreover, what miners get after blasting is rock wastes, lumpy coal and sometimes
quality of coal also gets deteriorated due to mixing of rock wastes in blasted coal. Waste dumps also create long-term
environmental problems. This paper develops a new methodology to generate sustainable value in opencast coal mining
significantly increasing the inextricably-linked demand of production systems, by way of designing blast-free opencast
coal mines. Mechanical method of cutting and breaking the overlying rocks and coal seams as well can replace the
prevalent practice of blasting with explosives. An experiment of the designed method has been conducted using locally
made simple tools and a comparative study was made to examine the benefits of the design over the prevalent practice.
The method is found socio-eco-effective, economically viable and provides new business opportunity. There appears
substantial prospect for applicability of the design in coal mining industry, and it deserves a high potential to become a
brand CSR practice on the industry to benefit the society and improve sustainability.
This document provides an overview of open-pit mining basics. It discusses that open-pit mining, also called surface mining, extracts ore or minerals from the ground without tunneling underground. The document outlines the two main types of mining as surface mining and subsurface mining. It also provides details on open-pit mining methods, factors for selecting mining methods, advantages and disadvantages of open-pit mining, and the key operations involved in open-pit mining.
A review of highwall mining experience and practiceaussiexp
This document provides a review of highwall mining experience and practices. It discusses the history and development of highwall mining, primarily in the United States and Australia. Two main highwall mining systems are described - continuous highwall mining (CHM) and auger mining. CHM systems can penetrate deeper and be more productive. Geotechnical considerations for highwall mining panel design are also reviewed, including web and barrier pillar stability, roof stability in mined entries, and highwall stability. Water inflows and methane levels are additional factors that can impact highwall mining operations. Overall, the document aims to summarize the history and current state of highwall mining while highlighting important geotechnical design considerations.
This document provides information about various aspects of mineral resources and mining. It discusses three current boom employers for geologists: mineral resources and mining, the petroleum industry, and the environmental industry. It then covers definitions and terms related to mineral resources. It outlines the steps involved in obtaining mineral commodities, from prospecting through refining and transportation. Finally, it notes that mining is an economic activity and the decision to mine depends on an analysis of costs, benefits, and risks.
Lecture 10 Mineral Resources and Mining s.pptMajidKhan858527
This document discusses mineral resources and mining. It covers several topics including the different industries that employ geologists, important ore types and deposits, steps involved in obtaining mineral commodities from prospecting through refining, factors that influence whether to mine a deposit, and various mining and processing techniques. Key employment centers for geologists include the mineral resources and mining industry, petroleum industry, and environmental industry.
The effects of Coal Mining on our environment and us humans and how it disrupt cycles on Earth biologically, geologically, and chemically. ( BIOGEOCHEMICAL CYCLES ) Examples is the Semirara Island in the Philippines.
This document summarizes the process of oil and gas exploration. It discusses how oil and gas deposits are formed over millions of years, and the characteristics needed for reservoirs to trap hydrocarbons underground. Surveys including geological analysis and seismic surveys are used to identify potential reservoir locations. Exploration wells are then drilled to test formations, and core samples and logging provide data on the resource. If oil or gas is found, further appraisal wells evaluate the reservoir extent and productivity.
This presentation discusses open pit and underground mining methods. Open pit mining involves extracting rock and minerals from the surface, has advantages like safety and equipment simplicity but requires large land areas and leaves noise and dust pollution. Underground mining uses tunneling techniques, allows deeper extraction while limiting environmental impact but is more complex, dangerous and inefficient. The Khalashpir coal field in Bangladesh is described as having 8 coal seams up to 16.9 meters thick, with proven reserves of 685 million tons, and is planned to use longwall mining given seam thickness.
Cement refers to the commodities that are produced by burning mixtures of limestone and other
minerals or additives at high temperature in a rotary kiln, followed by cooling, finish mixing, and
grinding. This is the manner in which the vast majority of commercially-important cementations
materials are produced in the United States. Cements are used to chemically bind different
materials together. The most commonly produced cement type is "Portland" cement, though
other standard cement types are also produced on a limited basis.
Cement plants produced 99.8 million metric tons of cement. Worldwide production accounted
for about 2.5 billion metric tons. As with most large manufacturing industries, by-product
materials are generated. These industrial by-product and waste materials must be managed
responsibly to insure a clean and safe environment.
Coal mining can negatively impact the environment through air, water, land, noise, and solid waste pollution. Steps are taken to minimize these impacts, including careful planning, pollution control measures, environmental monitoring, and site rehabilitation. However, coal mining remains an important industry that contributes to economies and development by providing energy, jobs, and revenues, especially in developing countries. Mitigation efforts aim to maximize the value of coal production while reducing negative environmental consequences through practices like land rehabilitation, water treatment, and dust suppression.
Mining (ore minerals and lessening the impact of mining)Jason Alcano
The document discusses the extraction of minerals from ores. It defines what an ore is and describes the different types of ore deposits based on their formation process. It then explains various mining and processing techniques used to extract the desired mineral from the ore, including surface mining methods like open-pit and strip mining, and subsurface mining. Finally, it outlines some key processes used in mineral extraction like leaching, smelting, and roasting.
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3. Department Geology
Programme M.Sc. Geology
Semester IV
Paper GEOT 401: ORE GEOLOGY AND MINING
Teacher Name Dr. Meraj Alam
Topic Name Coal Mining Methods their advantages and
disadvantages
4. INTRODUCTION
Coal is containing more than 50 percent by weight of
carbonaceous material, formed from compaction and
induration of variously altered plant remains similar to
those in peat.
Most coal is fossil peat.
Peat is an unconsolidated deposit of plant remains from a
water saturated environment such as a bog or mire;
structures of the vegetal matter can be seen, and, when
dried, peat burns freely.
Coal is the most abundant fossil fuel on Earth.
Coal is found in beds or seams interstratified with shales,
clays, sandstones, or limestones (rarely). The Coal deposits
in India are of two distinct geological ages.
5. INTRODUCTION
The earliest coal deposits are of Permian age formed
about 270 million years ago. At that time South Africa ,
South America , Antarctica , Australia , India and
Madagascar formed a landmass called Gondwanaland.
Coal formed in Gondwanaland are known as
Gondwana Coal.
Other deposits of Tertiary age (30-60 million years)
have been formed comparatively recently. These are
known as Tertiary Coal .
Coal is extracted from the ground by coal mining. Since
1983, the world's top coal producer has been China
6.
7. HISTORY OF COAL MINING
Ancient people mined coal by picking and scraping and used it for heating,
cooking, and in ceremonial chambers as early as the 12th century AD; in the
14th century they used it industrially in pottery making.
Small-scale mining of surface coal deposits dates back thousands of years.
The Romans were exploiting all major coalfields by the late 2nd century
AD. Coal was mined in America in the early 18th century, and commercial
mining started around 1730 in Midlothian, Virginia.
Coal-cutting machines were invented in the 1880s. Before this invention, coal
was mined from underground with a pick and shovel.
By 1912, surface mining was conducted with steam shovels designed for
coal mining.
Coal mining has had many developments over the recent years, from the
early days of men tunneling, digging and manually extracting the coal on
carts, to large open cut and long wall mines.
The various methods of mining a coal seam can be classified under two
headings, surface mining and underground mining.
8.
9. METHODS OF EXTRACTION
The most economical method of coal extraction from coal seams
depends on the depth and quality of the seams, and the geology
and environmental factors. Many coal deposits are extracted from
both surface and underground mines. Surface mining and deep
underground mining are the two basic methods adopted for
mining coal.
The choice of mining method depends primarily on depth of
burial, density of the overburden and thickness of the coal seam.
Seams relatively close to the surface, at depths less than
approximately 180 ft (50 m), are usually surface mined. Coal that
occurs at depths of 50 to 100 m are usually deep mined, but in
some cases surface mining techniques can be used. Coals
occurring below 100 m are usually deep mined.
10. FEASIBILITY OF COAL MINING
The technical and economic feasibility of coal mining are evaluated based on
the following:
a) regional geological conditions;
b) overburden characteristics;
c) coal seam continuity, thickness, structure, quality, and depth;
d) strength of materials above and below the seam for roof and floor
conditions;
e) topography (especially altitude and slope);
f) climate;
g) land ownership as it affects the availability of land for mining and access;
h) surface drainage patterns;
i) ground water conditions;
j) availability of labor and materials;
k) coal purchaser requirements in terms of tonnage, quality, and destination;
and
l) capital investment
11.
12. SURFACE MINING
Surface coal mining generally involves the following sequence
of unit operations:
(1) clearing the land of trees and vegetation,
(2) removing and storing the top layers of the unconsolidated
soil (topsoil),
(3) drilling the hard strata over the coal seam,
(4) fragmenting or blasting the hard strata with explosives,
(5) removing the blasted material, exposing the coal seam,
and cleaning the top of the coal seam,
(6) fragmenting the coal seam, as required, by drilling and
blasting,
(7) loading the loose coal onto haulage conveyances,
(8) transporting the coal from the mine to the plant, and
(9) reclaiming lands affected by the mining activity.
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22.
23. Opencast Mining Underground Mining
Advantages Disadvantages Advantages Disadvantages
Cheap – low tech Can’t reach deep seams Reach deeper seams
than open
Expensive – high tech
Flexible if problems Overburden storage
instability
Mine under sea or
areas where open pits
would be eyesores
Inflexible if problems
Mine steeply dip seam Groundwater supply
disruption
Less polluting Only mine horizontal
seams
Economically mine
thinner seams
Eyesore Waste backfilled into
mine
Water issues –
expensive to pump out
Gas dispersed to air Dust and noise (baffle) Roof collapse/cave ins
Roof collapse less
problematic
Less safe
Safer Spoil tips unstable
Water easily dealt with
24. MINE CONVEYORS
Belt conveyors have been used for mineral transport below
ground in mines. It started more vigorously after the time of
the First World War.
Their use continued to grow, aligned to the move from pillar
and stall to longwall mining systems. They were initially
used to replace horses and rope haulages for the more
efficient transportation of minerals in mines.
The available records show that there were 1356 km of belt
conveyors installed in British coal mines in 1948 which rose
to 2692 km by 1953.
A typical present-day large coal mine has some 30 km of
belt conveyors. Individual belt conveyor installations vary
widely in their design, capacity and duty.
25. MINE VENTILATION
Underground mine ventilation provides a flow of air to the underground
workings of a mine of sufficient volume to dilute and remove dust and
noxious gases and to regulate the temperature.
The source of gases are equipment that runs on diesel engines, blasting with
explosives and sometimes, the ore body itself.
Mine ventilation is done to provide oxygen to the miners and to dilute, render
harmless, and carry away dangerous accumulations of gases and dust.
In some of the gassiest mines, more than six tons of air are circulated
through the mine for every ton of coal mined.
Air circulation is achieved by creating a pressure difference between the mine
workings and the surface through the use of fans.
Fresh air is conducted through a set of mine entries (called intakes) to all
places where miners may be working.
After passing through the workings, this air (now termed return air) is
conducted back to the surface through another set of entries (called returns).
26. MONITORING AND CONTROL
Advancements in sensor technology and in computer
hardware and software capabilities are finding
increasing application in underground coal mines,
especially in the monitoring and control of ventilation,
haulage, and machine condition.
Longwall shearers and shields can be remotely operated,
and continuous miners have also been equipped with
automatic controls.
The atmospheric environment is remotely monitored for
air velocity, concentrations of various gases, and
airborne dust; fans and pumps are also monitored
continuously for their operational status and
characteristics.
27. HEALTH, SAFETY, AND ENVIRONMENT
Code of practice for occupational safety and
occupational health in coal mining - prescribes
responsibilitys of the state, coal miners, employers,
managers, supervisors and surveyors; covers notification
and reporting system for occupational accidents and
occupational diseases, protective
equipment, ventilation, precautions to take against
explosions, fires and dust, use of explosives, electricity,
equipment and machinery, first aid, rescue, training
needs, etc.
28. COAL MINING IN INDIA
Coal mining in India began in 1774 when John Sumner and
Suetonius Grant Heatly of the East India Company
commenced commercial exploitation in the Raniganj
Coalfield along the Western bank of Damodar river.
The first proposal for regulation of mining in India came in
1890, which was introduced by Lord Cross, who at that time
was the Secretary of State of India, later in 1894 for the
first time Inspector of Mines was appointed for the purpose
of management and supervision. In the year 1901, first Mine
Act enacted in India which was only applicable to the mines
situated in British India, which was accompanied with
establishment of “Bureau of Mines Inspection” in Kolkata.
Since then Mine Act has been re-enacted in 1923, 1928 and
1935.
29. COAL MINING IN INDIA
The mineral resources in India consist of Coal, Iron ore,
Manganese, Mica, Bauxite, Titanium ore, Chromite, Diamonds,
etc. India is the third largest producer of Coal and Lignite &
Barytes and the largest producer of mica in the world. India
is also ranked among the top producers of Iron ore, Bauxite,
Manganese ore and Aluminium.
In 2003-2004 India has produced 355 million tones of coal
all of which has been consumed internally. Coal India Limited
is a State owned company which contributes a bulk
percentage in the Coal production. As on 31 March 2015,
India had estimated coal reserves of 306.6 billion metric
tons (338.0 billion short tons), the fifth largest coal reserves
in the world.
30. COAL MINING IN INDIA
For this reason, coal mining worldwide is heavily
regulated through health and safety laws.
In coal mining—particularly underground coal mining—
there are numerous conditions that can threaten the
health and safety of the miners.
The operation of the mining sector in India is governed
by the Mines and Minerals (Development and Regulation
Act, 1957, the Mines Act, 1952 and the rules and
regulations framed under them.
31. LEGAL ASPECTS OF COAL MINING
The Coal Mines (Nationalisation) Act, came in 1973. The
Administration of the Coal Mines (Conservation and
Development) Act, came in 1974 (28 of 1974).
Coal mining, world over, is highly regulated industry due
to presence of many inherent, operational and
occupational hazards. Coal Mine Safety Legislation in
India is one of the most comprehensive and pervasive
statutory framework for ensuring occupational health
and safety (OHS). Compliance of these safety statutes is
mandatory.
32.
33. Contd…
Coal mining has had many developments over the
recent years. Technological advancements have made
coal mining today more productive than it has ever
been. To cope up with the technology and to extract
coal as efficiently as possible, the mining personnel must
be highly skilled and well trained in the use of complex,
state-of-the-art instruments and equipment. It is also
necessary to know all these coal mining methods.