This report provides the details of the widely adopted methods of mining, both surface and underground and to have an overview of all the operations that are made to explore the economic mineral resources.
This report provides the details of the widely adopted methods of mining, both surface and underground and to have an overview of all the operations that are made to explore the economic mineral resources.
Subsidence is one of the major environmental issues related to underground mining industry. This presentation gives an insight to causes, nature, effect of subsidence and some mitigation measures.
Room and Pillar mining method is one of the oldest existing mining methods. This system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars. Usually those room and pillars are uniform size. Pillars may or may not be removed after extraction.
Used for soft as well as hard rock mining and is commonly associated with coal, potash, uranium, and other industrial materials.
Metallogenic Epoch and Province
Metallogenetic Epochs
Metallogenetic epochs, as defined above, are specific periods characterised by formation of large number of mineral deposits. It does not mean that all the mineral deposits formed during a definite metallogenetic epochs. In India the chief metallogenetic epochs were:
1. Precambrian
2. Late Palaeozoic
3. Late Mesozoic to Early Tertiary
Subsidence is one of the major environmental issues related to underground mining industry. This presentation gives an insight to causes, nature, effect of subsidence and some mitigation measures.
Room and Pillar mining method is one of the oldest existing mining methods. This system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars. Usually those room and pillars are uniform size. Pillars may or may not be removed after extraction.
Used for soft as well as hard rock mining and is commonly associated with coal, potash, uranium, and other industrial materials.
Metallogenic Epoch and Province
Metallogenetic Epochs
Metallogenetic epochs, as defined above, are specific periods characterised by formation of large number of mineral deposits. It does not mean that all the mineral deposits formed during a definite metallogenetic epochs. In India the chief metallogenetic epochs were:
1. Precambrian
2. Late Palaeozoic
3. Late Mesozoic to Early Tertiary
Groundwater province is an area or region in which geology and climate combine to produce groundwater conditions consistent enough to permit useful generalisations.
River bank erosion, its migration, causesNazim Naeem
Riverbank Erosion is an endemic natural hazard in our country.
When rivers enter the mature, they become sluggish and
meander or braid. These oscillations cause extreme riverbank
erosion. It is a perennial problem in our country.
• It has been estimated that tens of thousands of people are
displaced annually by river erosion in Bangladesh, possibly up to
100,000. Many households are forced to move away from their
homesteads due to riverbank erosion and flood.
• As per different sources, 500 kilometres of riverbank face
severe problems related to erosion. The northwest part of the
country is particularly prone to riverbank erosion, which has
turned the region into an economically depressed area.
Overview of Mining Operations, Impacts and Challenges in Papua New GuineaDr. Subramanyam Revanuru
1) Overview of Mining in Papua New Guinea
2) Surface Mining: OPENCAST MINING TECHNOLOGY
3) Drilling Operations
4) Transportation through Conveyor Belts
5) Environmental Impacts of Mining
6) Environmental Impact of Surface Mining
7) Contribution to Aquatic Pollution by PNG’s Mining Companies
8) Few more consequences of Unregulated Dumping of Mining Waste in Aquatic System
9) Contribution to Aquatic Pollution by PNG’s Mining Companies
10) Impacts of Sea Bed Mining
11) Mining Accidents in PNG
Overview of Mining Operations, Impacts and Challenges in Papua New GuineaDr. Subramanyam Revanuru
1) Overview of Mining in Papua New Guinea
2) Surface Mining: OPENCAST MINING TECHNOLOGY
3) Drilling Operations
4) Transportation through Conveyor Belts
5) Environmental Impacts of Mining
6) Environmental Impact of Surface Mining
7) Contribution to Aquatic Pollution by PNG’s Mining Companies
8) Few more consequences of Unregulated Dumping of Mining Waste in Aquatic System
9) Contribution to Aquatic Pollution by PNG’s Mining Companies
10) Impacts of Sea Bed Mining
11) Mining Accidents in PNG
Heavy Mineral Studies of Beach Sands of Vagathor, North Goa, IndiaIJMER
Vagator beach is situated 22 km away from panjim on the northern side Bardez taluk
approachable via Candolim are Mapusa by road. The beach is projected on both the sides by
promontories. The beach is in arcuate shape, the area included with survey of India toposheet No
48/E/14 which is bounded by latitudes 15º35ˈN 15º38ˈN and longitude 78º43ˈE. The Chapora river
and its tributaries drain the entire region that is the Vagator beach. It flows from North-East to
South-West direction. The drainage pattern is structurally controlled; the Chapora River has its
source in the Ramghat hills of Belgaum district in Karnataka then it flows through the Thilari ghat
and enters Goa. Its length in Goa is about 31 km and the mouth of the river bank, mud bank and
mangroves swamps are common.
In laboratory techniques heavy mineral separation are based mass separation in a liquid
with specific gravity and magnetic separation using hand magnet and Frantz isodynamic separator
at different volts. X-ray analysis was carried out by using RIGAKU ALTIMA IV copper target on the
basis of Bragg’s law. The non magnetic sand grains was observed under optical microscope to
identify diagnostic properties of minerals.
The heavy mineral shoot comprises of opaque (magnetite and illmenite) and transparent heavy
minerals like hornblende, epidote, garnet, rutile, zircon, enstatite and minor amounts of tourmaline.
The light minerals are mainly quartz and feldspars. The magnetite concentration ranges between 2.01
to 56.86% and Ilmenite between 2.83 to 41.04% and non mangnetics between 1.18 to 44.81%. X ray
diffraction studies and SEM (Scanning electron microscope) studies were employed to study the
mineralogical composition of beach sands of Vagator and detailed investigations are dealt in the
paper.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
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Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
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The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
4. What is Limestone?
■ Limestone is a sedimentary rock composed mainly of calcium carbonate (CaCO3) in
the form of the mineral calcite.
■ The two most important constituents of limestone are calcite and dolomite.
■ Limestone altered by dynamic or contact metamorphism become coarsely crystalline
and are referred to as 'marble' and 'crystalline limestone’.
■ The limestone which is used by industries in bulk quantity is a bedded type
sedimentary limestone.
■ The dimensional limestone is used for building and ornamental stone.
5. Resources and Reserves in India
■ The total reserves/resources of limestone of all categories and grades as per NMI
database based on UNFC system as on 2015 has been estimated at 2,03,224 million
tonnes, of which 16,336 million tonnes (8%) are placed under Reserves category and
1,86,889 million tonnes (92%) are under Resources category.
■ Karnataka is the leading state having 27% of the total resources followed by Andhra
Pradesh & Rajasthan (12% each), Gujarat (10%), Meghalaya (9%), Telangana (8%) and
Chhattisgarh & Madhya Pradesh (5% each). Grade-wise, cement grade (Portland) has
leading share of about 70% followed by Unclassified grades (12%) and BF grade (7%).
The remaining 11% is shared by various other grades.
6. Production (in 2017-18)
■ The production of limestone in India is recorded at 338.55 million tonnes from 711
reporting mines.
■ About 97% of the total production of limestone was of cement grade and the
remaining 3% was of other grades.
■ Rajasthan is the leading producing state accounting for (22%) of the total production
of limestone, followed by Madhya Pradesh (13%), Andhra Pradesh & Chhattisgarh
(11% each), Karnataka (9%), Telangana (8%), Gujarat (7%) and Tamil Nadu (6%). The
remaining 13% is contributed by Maharashtra, Himachal Pradesh, Meghalaya, Odisha,
Uttar Pradesh, Assam, Jharkhand, Jammu & Kashmir, Kerala and Bihar.
7. Mining method
■ In India, limestone mines are worked by opencast method.
■ Some mines have well-laid road-cum-rail routes.
■ The large mines are developed by forming benches in overburden and limestone bed.
■ The face length, width and height of the benches correspond to the mining machinery
deployed and production schedule.
■ Heavy earth-moving machinery like 3.3 to 4 m3 capacity hydraulic excavators in
combination with 10-35 tonnes dumpers are normally used.
■ Other mines are mainly worked by semi-mechanised and manual opencast mining
methods. As per MCDR reports, drilling is done by Jack hammer & Wagon drill and blasting
is done byANFO, Slurry explosives, emulsion explosives etc.
8. Uses of limestone
■ The principal use of limestone is in the Cement Industry.
■ Other important uses are in:
1. Manufacture of quicklime (calcium oxide), slaked lime (calcium hydroxide) and mortar
2. Medicines and Cosmetics.
3. Glass making
4. Suppress methane explosions in underground coal mines
5. In blast furnaces, limestone binds with silica and other impurities and facilitates their
removal from iron
10. Groundwater
■ Groundwater quality can be affected by quarrying limestone by increasing sediment
and accidental spills directly into the aquifers.
■ These contaminants can also include material like oil and gas from mining equipment.
■ Contaminants in ground water move faster through limestone than other types of
rocks.
■ Pumping water out of underground mines changes the direction and the amount of
groundwater flow.
■ When the operation of a quarry or mine ends, the direct impacts on groundwater
quality may decreased but the long-term contamination can persist.
11. Subsidence
■ Limestone is often mined by opencast working.
■ In humid climates, limestone dissolves quickly and is carried away by water. This
creates caves which can become weak and collapse.
■ Underground mining of limestone can cause a cascading environmental impact. It can
lower the water table, which removes the support of rock that overlies water-filled
caverns, which can create sinkholes.
12. Habitat Destruction
■ As rock is removed by quarrying, any cave passages and the habitat it provides are
destroyed.
■ Animals that inhabit these areas that are mobile will be able to find new habitats to
survive.
■ Those species that have adapted to such deep cave zones will simply perish.
13. Dust
■ Dust is one of the most visible impacts associated with limestone quarrying due to the
drilling, crushing and screening of the rock.
■ The mine site conditions can affect the impact of dust generated during extraction,
including rock properties, moisture, ambient air currents and prevailing winds, and the
proximity to population centres.
■ Fugitive dust can escape from trucks traveling on excavation haul roads and from
blasting.This airborne dust can travel long distances from a mining site and affect
urban and rural residential areas downwind.
15. Abstract
■ Katni river watershed covering an area of 1480.4 km2, extends between 23° 34' 53" N to 24°
06' 07 " N latitudes and from 80° 10' 29" E to 80° 41' 38" E longitudes.
■ The limestone is of high grade, rich in calcium content and good for extraction of lime.
■ Several small opencast mining activities have developed in this area in past few years.
■ These mines are located in the Pedi plains situated at the foothills of linear ridges along the
northern boundary of the watershed.
■ The underlying rocks are soft and permeable therefore the rainwater filled in these
opencast mine pits percolates and degrade the ground water quality by increasing the
calcium content and total hardness.
16. Study Area
Madhya Pradesh, the geographic heart of India,
extended between latitude 21° 04' and 26° 52' N and
74° 01' and 82° 48' E.
Katni district is situated in the east central portion of
Madhya Pradesh, surrounded by Jabalpur, Damoh,
Panna, Satna and Umaria districts.
Katni river is the main river passing through the
district, gave the name to the district.
Katni river watershed extends from 23° 34' 53" N to
24° 06' 07" N latitudes and from 80° 10' 29"E to 80°
41' 38" E longitudes covering an area of 1480.4 km2.
Climate of the study area is sub-tropical and sub
humid. The mean annual temperature is 37.8° C with a
mean maximum temperature 41.3° C and a mean
minimum temperature 12.5°C.
The study area enjoys good monsoon rains with an
average annual precipitation of 1368 mm.
17. Impact on lithology and geomorphology
■ This area is well known for its limestone which is of very high grade.
■ Most of the limestone quarries are situated in northern part of the study area which is
higher in elevation in comparison to the other parts of the watershed.
■ Therefore, during the rainy season the water filled up in these open mining pits
percolates downwards an also increases the turbidity of streams originating from
these high elevation areas.
19. Impact on slope and drainage
■ Major part of the study area is having level to gentle slope supporting the dendritic
drainage pattern.
■ The major stream is Katni river flowing in the central part of the area. It meets
Mahanadi river in north west.
■ In Northern part of the area streams are originating from linear ridges of shaly
sandstone, limestone with porcellinite which belongs to Vindhyan supergroup. Most of
the limestone mine quarries are situated in this area.
■ These streams originate from high slope area and run almost parallel to each other.
These streams pass through the limestone belt and the mining pits and carry a huge
load of silt with them in rainy season.
21. Impact on water quality
■ In the study area, the water quality data for 72 observation wells in different villages were
collected for the period of October – November 1995 and 2006.
■ Analysis of this data reveals that the calcium concentration in the study area was ranging
between 11 to 44 mg/l, in the year 1995. In a period of eleven years i.e. in 2006 calcium
concentrations in these observation wells increased to the range of 36 to 114 mg/l.
■ Similarly, the total hardness, which was ranging from 24 to 74 mg/l increased to 115 to 500
mg/l.
■ The spatial distribution of calcium concentration indicates that the area near to opencast
limestone mines is having higher concentration.
■ The calcium concentration is above the desired limit in almost entire study area, whereas
total hardness is above the desirable limit of Indian standards in almost 30% of the total
geographical area.
23. Conclusion
■ It is seen that the water quality is degrading very fast in the study area. In a short
period of eleven years the calcium content and total hardness of groundwater has
reached from the normal limit to a higher side of desirable limit of Indian standards
(BIS) and crossed the limits of international standards.
■ The Calcium and total hardness concentration are high in downstream areas of
limestone mine quarries.
■ Therefore, it can be concluded that the opencast mining pits of limestone mining are
the major source of pollution of ground water, which is the main source of drinking
water in this area.
■ Therefore, it is necessary to take the preventive measures in the study area to check
the pollution in this area.
24. References
■ Indian Minerals Yearbook (2018), Limestone and other calcareous materials, Indian
Bureau of Mines, Ministry of Mines, Government of India.
■ Bhatnagar Devanu Et Al. (2014), Impact of opencast limestone mining in Katni river
watershed, Madhya Pradesh, India – A geoinformatics approach, Journal of geomatics,
Vol.8
■ https://sciencing.com/weathering-erosion-harmful-23923.html
■ https://education.seattlepi.com/environmental-hazards-limestone-mining-5608.html