Disturbance factor (D) is related to excavation method and cause damage and stress relief in the rock masses. The convergence and plastic zone around tunnels depends on the disturbance factor of rocks.This study has been in the tunnel No.2 of Kurdistan in NW of Iran which is composed of shale rocks. In tunnel modeling, different disturbance factors(0 to 1) areanalyzed using phase2 software and the amount of displacement and extent of plastic zone in around the tunnelis determined. The obtain results show that by increasing of disturbance factor, the displacement and plastic zone around the tunnel has increased and the most increase has occurred in disturbance factors 0.8 to 1. Therefore, for excavation of this tunnel, the blasting method should not be used and instead of it, the mechanical methods must be used.
Its a presentation about the design aspect of open cast mine. The author believes it will surely help the mining engineering students at the beginning level.
Role of Rock Mechanics in Mining Industry : Applications in Underground MiningPavan Josyula
This is the technical report entitled as "Role of Rock Mechanics in Mining Industry : Applications in Underground Mining". This technical report mainly focus on the fundamentals of rock mechanics and its role in underground mining. I presume this technical report provides you a fundamental knowledge of rock mechanics focusing mainly on mining industry.
Its a presentation about the design aspect of open cast mine. The author believes it will surely help the mining engineering students at the beginning level.
Role of Rock Mechanics in Mining Industry : Applications in Underground MiningPavan Josyula
This is the technical report entitled as "Role of Rock Mechanics in Mining Industry : Applications in Underground Mining". This technical report mainly focus on the fundamentals of rock mechanics and its role in underground mining. I presume this technical report provides you a fundamental knowledge of rock mechanics focusing mainly on mining industry.
Techniques for measuring insitu stressesZeeshan Afzal
There are some methods that tells about insitu stresses and these are very important methods in Geology as well as well coring and also digging of well as well as in mining these methods are very helpful. So, main idea about is to information about these methods.
Firing patterns and its effect on muckpile shape parameters and fragmentation...eSAT Journals
Abstract Proper use of firing pattern vis-à-vis the blast requirements can provide optimal blast performance in terms of fragmentation, throw, wall control etc. This is largely attributed to the importance of firing burden in any blast round. By changing the firing patterns the firing burden, and, thereby the ratio of spacing to burden is also subject to change. Proper initiation timing is as important for fragmentation as the burden, spacing, sub drilling, stemming etc. Simultaneous initiation leads to the problems, such as, coarser fragmentation, blasting of a large number of holes at a given time which leads to the other problems. The present research study which was conducted in three limestone quarries where major problems such as of improper fragmentation, poor wall control, and poor heave characteristics of the muckpile were observed. Designed firing pattern was not able to provide the requisite fragmentation, and, even the throw. Modifications in firing pattern were implemented to obtain the required blast results. Keywords: Firing pattern, fragmentation, progressive relief, throw, drop, muckpile
Reinterpretation of Atterberg limits test results performed on fine-grained s...Rafael Ortiz
The comparison of fine-grained soil classifications from the Casagrande Plasticity Chart and a proposal for a revised Plasticity Chart based on the Clay Fraction.
Class notes of Geotechnical Engineering course I used to teach at UET Lahore. Feel free to download the slide show.
Anyone looking to modify these files and use them for their own teaching purposes can contact me directly to get hold of editable version.
Techniques for measuring insitu stressesZeeshan Afzal
There are some methods that tells about insitu stresses and these are very important methods in Geology as well as well coring and also digging of well as well as in mining these methods are very helpful. So, main idea about is to information about these methods.
Firing patterns and its effect on muckpile shape parameters and fragmentation...eSAT Journals
Abstract Proper use of firing pattern vis-à-vis the blast requirements can provide optimal blast performance in terms of fragmentation, throw, wall control etc. This is largely attributed to the importance of firing burden in any blast round. By changing the firing patterns the firing burden, and, thereby the ratio of spacing to burden is also subject to change. Proper initiation timing is as important for fragmentation as the burden, spacing, sub drilling, stemming etc. Simultaneous initiation leads to the problems, such as, coarser fragmentation, blasting of a large number of holes at a given time which leads to the other problems. The present research study which was conducted in three limestone quarries where major problems such as of improper fragmentation, poor wall control, and poor heave characteristics of the muckpile were observed. Designed firing pattern was not able to provide the requisite fragmentation, and, even the throw. Modifications in firing pattern were implemented to obtain the required blast results. Keywords: Firing pattern, fragmentation, progressive relief, throw, drop, muckpile
Reinterpretation of Atterberg limits test results performed on fine-grained s...Rafael Ortiz
The comparison of fine-grained soil classifications from the Casagrande Plasticity Chart and a proposal for a revised Plasticity Chart based on the Clay Fraction.
Class notes of Geotechnical Engineering course I used to teach at UET Lahore. Feel free to download the slide show.
Anyone looking to modify these files and use them for their own teaching purposes can contact me directly to get hold of editable version.
The International Journal of Engineering and Science (The IJES)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
STRESSES BELOW EXISTING STRUCTURES DURING TUNNEL EXCAVATION USING TUNNEL BORI...ijiert bestjournal
The Finite element (FE) analysis include the response of structures t o horizontal & vertical dynamic forces and consider all site characteristics,such as soils and geologic conditions. The induced stresses under the foundation of adjacent buildings during newly constructed underground tunnel through TBM,were investigated in this study. Results of this study were examined to find out whether the amount of variations in forces and stresses are in the allowable ranges or not. In this paper,soil parameters used for the study are based on the existing Delhi Metro tunnel site. Using these soils parameters,tunnel excavation through TBM has been modelled in PLAXIS Tunnel - 3D and the adjacent structures have also been included in the model.
Time-History Analysis on Seismic Stability of Nuclear Island Bedrock with wea...ijceronline
This paper presents a three-dimensional numerical simulation method for the seismic response calculation of nuclear island foundation based on the nuclear power plant in Tai Shan. There are two weak interlayers in the bedrock. The numerical simulation aimed at the analysis and the evaluation of the stability of bedrock with the consideration of the interaction between the bedrock and nuclear island. Main features of nuclear numerical model are: (1) the mechanical interaction of nuclear island buildings, turbine room and bedrock have been taken into consideration, (2) the two weak interlayers may decrease the stability of the bedrock, which are the focused research in the models, (3) non-reflective free field boundary have been used in the boundary condition of model. The commercial numerical software FLAC3D has also been used in the simulation and analysis. A finite difference of numerical model for nuclear island bedrock was established and it have been used to analyze the bedrock’s mechanical phenomenon and safety performance. Dynamic characteristics, distributions of mechanical parameters and failure characteristics of bedrock have been studied under the action of seismic wave.
The paper reveals the issue of improving the quality of rock mass crushing in
quarries of building materials. The analysis of methods for improving the quality of
crushing has been performed. A method to increase the time of impact of explosion
products on a mountain massif by changing charge design has been proposed. The
method was tested and the results of explosions at the quarry of Leningrad region were
presented. The experimental data show: theoretical calculations are consistent with
experimental data and have a slight deviation; the parameters of the rock mass
disruption allow using wheel loaders in the quarry. Yet, the use of new charge designs
enabled improving the quality of crushing, namely, increasing percentage of output of
an average piece of conditioned fraction, therefore, optimizing operation of the mining
entity as a whole.
Model Study of Slope Stability in Open Pit by Numerical Modeling Using the Fi...CrimsonPublishersAMMS
Model Study of Slope Stability in Open Pit by Numerical Modeling Using the Finite Element Method by Saadoun Abderrazak in Aspects in Mining & Mineral Science
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Similar to The effect of disturbance factor on the stability of tunnels (Case study: Tunnel No.2 of Kurdistan) (20)
Exploratory study on the use of crushed cockle shell as partial sand replacem...IJRES Journal
The increasing demand for natural river sand supply for the use in construction industry along
with the issue of environmental problem posed by the dumping of cockle shell, a by-product from cockle
business have initiated research towards producing a more environmental friendly concrete. This research
explores the potential use of cockle shell as partial sand replacement in concrete production. Cockle shell used
in this experimental work were crushed to smaller size almost similar to sand before mixed in concrete. A total
of six concrete mixtures were prepared with varying the percentages of cockle shell viz. 0%, 5%, 10%, 15%,
20% and 25%. All the specimens were subjected to continuous water curing. The compressive strength test was
conducted at 28 days in accordance to BS EN 12390. Finding shows that integration of suitable content of
crushed cockle shell of 10% as partial sand replacement able to enhance the compressive strength of concrete.
Adopting crushed cockle shell as partial sand replacement in concrete would reduce natural river sand
consumption as well as reducing the amount of cockle shell disposed as waste.
Congenital Malaria: Correlation of Umbilical Cord Plasmodium falciparum Paras...IJRES Journal
The vertical (trans-placental) transmission of the parasite Plasmodium falciparum from
pregnant mother to fetus during gestational period was investigated in a clinical research involving 43 full term
pregnant women in selected Hospitals in Jimeta Yola, Adamawa State Nigeria. During the observational study,
parasitemia was determined by light microscopic examination of umbilical and maternal peripheral blood film
for the presence of the trophozoites of Plasmodium falciparum. Correlational analysis was then carried on the
result obtained at p<0.05.><0.05) was established between maternal peripheral blood and umbilical cord
blood parasitemia with Pearson’s correlation coefficient of 0.762. Thus, in a malaria endemic area like Yola,
Adamawa State, Nigeria, with a stable transmission of parasite, there is a high probability of vertical
transmission of Plasmodium falciparum parasite from mother to fetus during gestation that can be followed by
the presentation of the symptoms of malaria by the newborn and other malaria related complications. Families
are advised to consistently sleep under appropriately treated insecticide mosquito net to avoid mosquito bite and
subsequent infestation.
Review: Nonlinear Techniques for Analysis of Heart Rate VariabilityIJRES Journal
Heart rate variability (HRV) is a measure of the balance between sympathetic mediators of heart
rate that is the effect of epinephrine and norepinephrine released from sympathetic nerve fibres acting on the
sino-atrial and atrio-ventricular nodes which increase the rate of cardiac contraction and facilitate conduction at
the atrio-ventricular node and parasympathetic mediators of heart rate that is the influence of acetylcholine
released by the parasympathetic nerve fibres acting on the sino-atrial and atrio-ventricular nodes leading to a
decrease in the heart rate and a slowing of conduction at the atrio-ventricular node. Sympathetic mediators
appear to exert their influence over longer time periods and are reflected in the low frequency power(LFP) of
the HRV spectrum (between 0.04Hz and 0.15 Hz).Vagal mediators exert their influence more quickly on the
heart and principally affect the high frequency power (HFP) of the HRV spectrum (between 0.15Hz and 0.4
Hz). Thus at any point in time the LFP:HFP ratio is a proxy for the sympatho- vagal balance. Thus HRV is a
valuable tool to investigate the sympathetic and parasympathetic function of the autonomic nervous system.
Study of HRV enhance our understanding of physiological phenomenon, the actions of medications and disease
mechanisms but large scale prospective studies are needed to determine the sensitivity, specificity and predictive
values of heart rate variability regarding death or morbidity in cardiac and non-cardiac patients. This paper
presents the linear and nonlinear to analysis the HRV.
Dynamic Modeling for Gas Phase Propylene Copolymerization in a Fluidized Bed ...IJRES Journal
A two-phase model is proposed for describing the dynamics of a fluidized bed reactor used for
polypropylene production. In the proposed model, the fluidized bed is divided into an emulsion and bubble
phase where the flow of gas is considered to be plug flow through the bubbles and perfectly mixed through the
emulsion phase. Similar previous models, consider the reaction in the emulsion phase only. In this work the
contribution of reaction in the bubble phase is considered and its effect on the overall polypropylene production
is investigated the kinetic model is combined with hydrodynamic model in order to develop a comprehensive
model for gas-phase propylene copolymerization reactor. Simulation profiles of the proposed model were
compared with those of well mixed model for the emulsion phase temperature. The simulated temperature
profile showed a lower rate of change compared to the previously reported models due to lower polymerization
rate. Model simulation showed that about 13% of the produced polymer comes from the bubble phase and this
considerable amount of polymerization in the bubbles should not be neglected in any modeling attempt.
Study and evaluation for different types of Sudanese crude oil propertiesIJRES Journal
Sudanese crude oil is regarded as one of the sweet types of crude in the world, Sulphur containing
compounds are un desirable in petroleum because they de activate the catalyst during the refining processes and
are the main source of acid rains and environmental pollution.(Mark Cullen 2001),Since it contains considerable
amount of salts and acids, it negatively impact the production facilities and transportation lines with corrosive
materials. However it suffers other problems in flow properties represented by the high viscosity and high
percentage of wax. Samples were collected after the initial and final treatment at CPF, and tested for
physical and chemical properties.wax content is in the range 23-31 weight % while asphalting content is about
0.1 weight% . Resin content is 13-7 weight % and deposits are 0.01 weight%. The carbon number distribution in
the crude is in the range 7-35 carbon atoms. The pour point vary between 39°C-42°C and the boiling point is in
the range 70 °C - 533 °C.
A Short Report on Different Wavelets and Their StructuresIJRES Journal
This article consists of basics of wavelet analysis required for understanding of and use of wavelet
theory. In this article we briefly discuss about HAAR wavelet transform their space and structures.
A Case Study on Academic Services Application Using Agile Methodology for Mob...IJRES Journal
Recently, Mobile Cloud Computing reveals many modern development areas in the Information
Technology industry. Several software engineering frameworks and methodologies have been developed to
provide solutions for deploying cloud computing resources on mobile application development. Agile
methodology is one of the most commonly used methodologies in the field. This paper presents the MCCAS a
Web and Mobile application that provide feature for the Palestinian higher education/academic institutions. An
Agile methodology was used in the development of the MCCAS but in parallel with emphasis on Cloud
computing resources deployment. Also many related issues is discussed such as how software engineering
modern methodologies (advances) influenced the development process.
Wear Analysis on Cylindrical Cam with Flexible RodIJRES Journal
Firstly, the kinetic equation of spatial cylindrical cam with flexible rod has been established. Then, an
accurate cylindrical cam mechanism model has been established based on the spatial modeling software
Solidworks. The dynamic effect of flexible rod on mechanical system was studied in detail based on the
mechanical system dynamics analytical software Adams, and Archard wear model is used to predict the wear of
the cam. We used Ansys to create finite element model of the cam link, extracted the first five order mode to
export into Adams. The simulation results show that the dynamic characteristics of spatial cylindrical cam
mechanical system with flexible rod is closed to ideal mechanism. During the cam rotate one cycle, the collision
in the linkage with a clearance occurs in some special location, others still keep a continuous contact, and the
prediction of wear loss is smaller than rigid body.
DDOS Attacks-A Stealthy Way of Implementation and DetectionIJRES Journal
Cloud Computing is a new paradigm provides various host service [paas, saas, Iaas over the internet.
According to a self-service,on-demand and pay as you use business model,the customers will obtain the cloud
resources and services.It is a virtual shared service.Cloud Computing has three basic abstraction layers System
layer(Virtual Machine abstraction of a server),Platform layer(A virtualized operating system, database and
webserver of a server and Application layer(It includes Web Applications).Denial of Service attack is an attempt
to make a machine or network resource unavailable to the intended user. In DOS a user or organization is
deprived of the services of a resource they would normally expect to have.A Successful DOS attack is a highly
noticeable event impacting the entire online user base.DOS attack is found by First Mathematical Metrical
Method (Rate Controlling,Timing Window,Worst Case and Pattern Matching)DOS attack not only affect the
Quality of the service and also affect the performance of the server. DDOS attacks are launched from Botnet-A
large Cluster of Connected device(cellphone,pc or router) infected with malware that allow remote control by an
attacker. Intruder using SIPDAS in DDOS to perform attack.SIPDAS attack strategies are detected using Heap
Space Monitoring Algorithm.
An improved fading Kalman filter in the application of BDS dynamic positioningIJRES Journal
Aiming at the poor dynamic performance and low navigation precision of traditional fading
Kalman filter in BDS dynamic positioning, an improved fading Kalman filter based on fading factor vector is
proposed. The fading factor is extended to a fading factor vector, and each element of the vector corresponds to
each state component. Based on the difference between the actual observed quantity and the predicted one, the
value of the vector is changed automatically. The memory length of different channel is changed in real time
according to the dynamic property of the corresponding state component. The actual observation data of BDS is
used to test the algorithm. The experimental results show that compared with the traditional fading Kalman filter
and the method of the third references, the positioning precision of the algorithm is improved by 46.3% and
23.6% respectively.
Positioning Error Analysis and Compensation of Differential Precision WorkbenchIJRES Journal
Positioning error is a widely problem exists in mechanism, the important factors affecting machining
precision. In order to reduce the error caused by positioning problem processing, based on the differential
workbench as the research object, using the method of theoretical analysis and experimental verification, the
analysis of positioning error mechanism and source of complete differential precision workbench error
compensation, improve the accuracy of the device, provides a method for the application of modern machine
tools. table.
Status of Heavy metal pollution in Mithi river: Then and NowIJRES Journal
The Mithi River runs through the heart of suburban Mumbai. Its path of flow has been severely
damaged due to industrialization and urbanization. The quality of water has been deteriorating ever since. The
Municipal and industrial effluents are discharged in unchecked amounts. The municipal discharge comprises
untreated domestic and sewage wastes whereas the industries are majorly discharge chemicals and other toxic
effluents which are responsible in increasing the metal load of the river. In the current study, the water is
analysed for heavy metals- Copper, Cadmium, Chromium, Lead and Nickel. It also includes a brief
understanding on the fluctuations that have occurred in the heavy metal pollution, through the compilation of
studies carried out in the area previously.
The Low-Temperature Radiant Floor Heating System Design and Experimental Stud...IJRES Journal
In order to analyze the temperature distribution of the low-temperature radiant floor heating system
that uses the condensing wall-hung boiler as the heat source, the heating system is designed according to a typical
house facing south in Shanghai. The experiments are carried out to study the effects of the supply water
temperature on the thermal comfort of the system. Eventually, the supply water temperature that makes people in
the room feel more comfortable is obtained. The result shows that in the condition of that the outside temperature
is 8~15℃ and the relative humidity is 30~70%RH, the temperature distribution in the room is from high to low
when the height is from bottom to top. The floor surface temperature is highest, but its uniformity is very poor.
When the heating system reaches the steady state, the air temperature of the room is uniform. When the supply
water temperature is 63℃ The room is relatively comfortable at the above experimental condition.
Experimental study on critical closing pressure of mudstone fractured reservoirsIJRES Journal
In the process of oil and gas exploitation of mudstone-fractured reservoir in Daqing oilfield, the
permeability of fracture is easily affected by the influence of stress change, which is shown by the sensitivity of
the permeability to the stress. With the extension of time mining in the fractured mudstone reservoir, fracture
stress sensitivity is obvious in vast decline of production and great influence on reduced yields. In order to
reasonably determine the way of developing method, working system and the exploitation rate of the reservoir,
correspondingly protecting reservoir productivity, improve ultimate recovery. On the basis of the previous
research on the stress sensitivity of fractured mudstone, this essay studied the critical closing pressure of the
simulated underground fractured mudstone under the laboratory condition.
Correlation Analysis of Tool Wear and Cutting Sound SignalIJRES Journal
With the classic signal analysis and processing method, the cutting of the audio signal in time
domain and frequency domain analysis. We reached the following conclusions: in the time domain analysis,
cutting audio signals mean and the variance associated with tool wear state change occurred did not change
significantly, and tool wear is not high degree of correlation, and the mean-square value of the audio signal
changes in the size and tool wear the state has a good relationship.
Reduce Resources for Privacy in Mobile Cloud Computing Using Blowfish and DSA...IJRES Journal
Mobile cloud computing in light of the increasing popularity among users of mobile smart
technology which is the next indispensable that enables users to take advantage of the storage cloud computing
services. However, mobile cloud computing, the migration of information on the cloud is reliable their privacy
and security issues. Moreover, mobile cloud computing has limitations in resources such as power energy,
processor, Memory and storage. In this paper, we propose a solution to the problem of privacy with saving and
reducing resources power energy, processor and Memory. This is done through data encryption in the mobile
cloud computing by symmetric algorithm and sent to the private cloud and then the data is encrypted again and
sent to the public cloud through Asymmetric algorithm. The experimental results showed after a comparison
between encryption algorithms less time and less time to decryption are as follows: Blowfish algorithm for
symmetric and the DSA algorithm for Asymmetric. The analysis results showed a significant improvement in
reducing the resources in the period of time and power energy consumption and processor.
Resistance of Dryland Rice to Stem Borer (Scirpophaga incertulas Wlk.) Using ...IJRES Journal
Rice stem borer is one of the important pests that attack plants so as to reduce production. One way
to control pests is to use organic fertilizers that make the plant stronger and healthier. This study was conducted
to determine the effects of organic fertilizers with various doses without the use of pesticides in controlling stem
borer, Scirpophaga incertulas. Methods using split-split plot design which consists of two levels of the whole
plot factor (solid and liquid organic fertilizers), two levels of the subplot factor (conventional and industry,
Tiens and Mitraflora), and four levels of the sub-subplot factor of conventional and industry (5, 10, 15, 20
tonnes/ha), and one level of the sub-subplot factor of Tiens and Mitraflora (each 2 ml/l). Based on the results
Statistical analysis there were no significant differences among treatments and this shows that the use of organic
fertilizers that only a dose of 5 tonnes/ha is sufficient available nutrients that make plants more robust and
resistant to control stem borer, besides that can reduce production costs and friendly to the environment when
compared with using inorganic fertilizers.
A novel high-precision curvature-compensated CMOS bandgap reference without u...IJRES Journal
A novel high-precision curvature-compensated bandgap reference (BGR) without using op-amp
is presented in this paper. It is based on second-order curvature correction principle, which is a weighted sum of
two voltage curves which have opposite curvature characteristic. One voltage curve is achieved by first-order
curvature-compensated bandgap reference (FCBGR) without using op-amp and the other found by using W
function is achieved by utilizing a positive temperature coefficient (TC) exponential current and a linear
negative TC current to flow a linear resistor. The exponential current is gained by using anegative TC voltage to
control a MOSFET in sub-threshold region. In the temperature ranging from -40℃ to 125℃, experimental
results implemented with SMIC 0.18μm CMOS process demonstrate that the presented BGR can achieve a TC
as low as 2.2 ppm/℃ and power-supply rejection ratio(PSRR)is -69 dB without any filtering capacitor at 2.0 V.
While the range of the supply voltage is from 1.7 to 3.0 V, the output voltage line regulation is about1 mV/ V
and the maximum TC is 3.4 ppm/℃.
Structural aspect on carbon dioxide capture in nanotubesIJRES Journal
In this work we reported the carbon dioxide adsorption (CO2) in six different nanostructures in order
to investigate the capturing capacity of the materials at nanoscale. Here we have considered the three different
nanotubes including zinc oxide nanotube (ZnONT), silicon carbide nanotube (SiCNT) and single walled carbon
nanotube (SWCNT). Three different chiralities such as zigzag (9,0), armchair (5,5) and chiral (6,4) having
approximately same diameter are analyzed. The adsorption binding energy values under various cases are
estimated with density functional theory (DFT). We observed CO2 molecule chemisorbed on ZnONT and
SiCNT’s whereas the physisorption is predominant in CNT. To investigate the structural aspect, the tubes with
defects are studied and compared with defect free tubes. We have also analyzed the electrical properties of tubes
from HOMO, LUMO energies. Our results reveal the defected structure enhance the CO2 capture and is
predicted to be a potential candidate for environmental applications.
Thesummaryabout fuzzy control parameters selected based on brake driver inten...IJRES Journal
In this paper, the brake driving intention identification parameters based on the fuzzy control are
summarized and analyzed, the necessary parameters based on the fuzzy control of the brake driving intention
recognition are found out, and I pointed out the commonly corrupt parameters, and through the relevant
parameters , I establish the corresponding driving intention model.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
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.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
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.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
AKS UNIVERSITY Satna Final Year Project By OM Hardaha.pdf
The effect of disturbance factor on the stability of tunnels (Case study: Tunnel No.2 of Kurdistan)
1. International Journal of Research in Engineering and Science (IJRES)
ISSN (Online): 2320-9364, ISSN (Print): 2320-9356
www.ijres.org Volume 2 Issue 11 ǁ November. 2014 ǁ PP.27-31
www.ijres.org 27 | Page
The effect of disturbance factor on the stability of tunnels (Case
study: Tunnel No.2 of Kurdistan)
MohammadrezaRajabi Khamseh1
٫Vahid Hosseinitoudeshki2
٭
(1- Department of Civil Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran)
(2- Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran)
٭Corresponding Author E-mail: toudeshki@gmail.com
ABSTRACT : Disturbance factor (D) is related to excavation method and cause damage and stress relief in
the rock masses. The convergence and plastic zone around tunnels depends on the disturbance factor of
rocks.This study has been in the tunnel No.2 of Kurdistan in NW of Iran which is composed of shale rocks. In
tunnel modeling, different disturbance factors(0 to 1) areanalyzed using phase2 software and the amount of
displacement and extent of plastic zone in around the tunnelis determined. The obtain results show that by
increasing of disturbance factor, the displacement and plastic zone around the tunnel has increased and the
most increase has occurred in disturbance factors 0.8 to 1. Therefore, for excavation of this tunnel, the blasting
method should not be used and instead of it, the mechanical methods must be used.
Keywords:Disturbance factor (D), Displacement, Plastic zone
I. INTRODUCTION
Disturbance factor (D) which introduced by [1] is related to excavation method and caused damage and
stress relief in the rock masses. This factor may also be considered in the estimate of rock mass modulus from
intact rock modulus. Excavation by Tunnel Boring Machine or hand excavation in poor quality rock masses
results in minimal disturbance to the rock mass surrounding a tunnel.Very poor quality blasting in hard rocks
results in much disturbance in surroundingatunnel [1]. The selection of the disturbance factor (D) is a technical
support question that arises frequently in relation to the use of the Hoek-Brown failure criterion. The most
important point in relation to the estimation of the disturbance factor (D) is that this factor should not be applied
to the entire rock mass surrounding the excavation. The disturbance factor (D) should only be applied to the
actual zone of damaged rock[2].
The study area is located in in Sanandaj - Sirjan structural zone [3] which has been affected regional
convergence in the NE-SW direction. In the regional tectonic, Sanandaj – Sirjan zone is located in the Turkish-
Iranian plateau [4]. It extends from eastern Anatolia to eastern Iran, and typically has elevations of 1.5–2
km.The tunnel No.2 of Kurdistan will be excavated in shale rocks in this area.
II. MATERIAL CHARACTERISTICS OF SHALE ROCKS
The physical and mechanical characteristics of the shale rocks were determined on obtained samples of
boreholes and field tests on outcrops. The specific gravity of these rocks varies from 2.63 to 2.67 and the
average value is 2.65.
The values of minimum and maximum UCS varies from 18 to 22MPa respectively, and the average
value is 20MPa. The low values of the UCS are mainly due to weak nature of these rocks. Therefore, according
to ISRM [5], the shale rocks proved to be weak rocks. In addition, based on [6], using the UCS, very low
strength was suggested for these rocks. The Poisson's ratio is 0.3, cohesion is 0.384MPa and friction angle is
32.98°. The average value for the rock material constant mi was determined using Hoek and Brown failure
criterion[7]. The value of mi for these rocks was obtained equal to 6.
III. CLASSIFICATION OF THE ROCK MASSES
The RMR and Q ratings have been determined using field data and the mechanical properties of intact
rock samples. The Rock Mass Rating (RMR) System [8], classifies rock masses using the following parameters:
uniaxial compressive strength (UCS), Rock Quality Designation (RQD), spacing of fractures, condition of
fractures, groundwater conditions, and orientation of fractures. The average RMR rating for the rock masses
assessed to be 46. This rating classifies the shale rocks as fair rock masses.
The Q rock mass classification system is also known as the NGI (Norwegian Geotechnical Institute)
have been developed by Barton et al. [9]. It is defined in terms of RQD, the function of joint sets (Jn),
discontinuity roughness (Jr), joint alteration (Ja), water pressure (Jw) and stress reduction factor (SRF). The
2. The effect of disturbance factor on the stability of tunnels (Case study: Tunnel No.2 of
www.ijres.org 28 | Page
average Q value for the rock masses is equal to 2.145. According to the Q classification system, the shale rocks
can be considered as poor rock masses.
IV. MECHANICAL PROPERTIES OF THE ROCK MASSES
The rock mass properties such as the rock mass strength (σcm), the rock mass deformation modulus
(Em) and the rock mass constants (mb, s and a) were calculated by the Rock-Lab program defined by Hoek et
al. [1]. This program has been developed to provide a convenient means of solving and plotting the equations
presented by Hoek et al. [1].
In Rock-Lab program, both the rock mass strength and deformation modulus were calculated using
equations of Hoek et al. [1]and the rock mass constants were estimated using equations of Geological Strength
Index (GSI) [1] together with the value of the shale material constant. Mean RMR values have been used to
estimate the GSI index for these rocks that exhibiting strain-softening behaviour.
Finally, the shear strength parameters of the rock mass (C and φ) for the rock masses were obtained
using the relationship between the Hoek–Brown and Mohr–Coulomb criteria [10] and are presented in Fig.1.
Fig.1. Rock mass parameters for zero disturbance factors
V. MATERIAL AND METHODS
The numerical method using the computational code (phase2) has been applied in analyzing the tunnel.
Phase2 is a two dimensional program which planned based on infinite elasto-plastic elements that used for
calculation the stresses and displacements around the underground excavations. In this paper, the tunnel is
simulated in shale rocks and with disturbance factor 0 to 1. Numerical analysis was based on two dimensional
analyzing and plane strain.
VI. THE TUNNEL MODELING
For modeling of the tunnel in shale rock masses a finite element model for horseshoe tunnel with span
of 12.5 meters are used. The external boundary of models is located in distance 5 times of tunnel diameter and
graded meshes with 6 nodes are used in finite element meshing (Fig. 2).
3. The effect of disturbance factor on the stability of tunnels (Case study: Tunnel No.2 of
www.ijres.org 29 | Page
Fig. 2. The modeling of tunnel with span of 12.5 m
Numerical analysis of the tunnel No.2 of Kurdistan includes analysis the amount of convergence and
plastic zone around of tunnel in different disturbance factors.
VII. CONVERGENCE AROUND THE TUNNEL
In order to surveying the convergence around the tunnel No.2 of Kurdistan, the amount of displacement
in the roof of tunnel for different disturbance factors is determined (for example in Fig. 3) and is represented in
diagram of Fig. 4.
Fig. 3. The amount of displacement in the roof of tunnel for zero disturbance factors
Fig. 4. The ratio of displacement to tunnel radius for different disturbance factors
4. The effect of disturbance factor on the stability of tunnels (Case study: Tunnel No.2 of
www.ijres.org 30 | Page
Diagram in Fig.4 shows that by increasing disturbance factor, the ratio of displacement in the roof of
tunnel increases and the most increase is in disturbance factors of 0.8 to 1. Since these disturbance factors is
related to very poor quality blasting method, therefore for excavation of the tunnel No.2 of Kurdistan,the
blasting method should not be used.
VIII. PLASTIC ZONE AROUND THE TUNNEL
To evaluate the plastic zone around the tunnel No.2 of Kurdistan, the radius of plastic zone in the roof
of tunnel for different disturbance factors is determined (for example in Fig. 5) and is represented in diagram of
Fig. 6.
Fig. 5. The radius of plastic zone in the roof of tunnel for zero disturbance factors
Fig. 6. The ratio of the radius of plastic zone to tunnel radius for different disturbance factors
Diagram in Fig. 6 shows that by increasing disturbance factor, the ratio of the radius of plastic zone in
the roof of tunnel increases and the most increase is in disturbance factors of 0.8 to 1. It also implies that for
excavation of the tunnel No.2 of Kurdistan, the blasting method should not be used and instead of it, the
mechanical methods must be used.
IX. CONCLUSIONS
In this study that with purpose of investigating the effect of disturbance factor on the stability of the
tunnel No.2 of Kurdistanis accomplished the following results have been obtained:
- By increasing the disturbance factor, the displacement and plastic zone around the tunnel is increased.
- The most of increase of displacement and plastic zone is occurred in disturbance factors of 0.8 to 1.
- The obtained results imply that for excavation of the tunnel No.2 of Kurdistan, the blasting method
should not be used.
5. The effect of disturbance factor on the stability of tunnels (Case study: Tunnel No.2 of
www.ijres.org 31 | Page
REFERENCES
[1] E.Hoek, C.T.Carranza-Torres andB.Corkum,.Hoek-Brown failure criterion-2002 edition. In: Proceedings of the fifth North
American rock mechanics symposium, Toronto, Canada, 1,2002, 267–273
[2] E.Hoek, Blast damage factor D, Technical note for Roc news. February, 2,2012
[3] A. Aghanabati, Geology of Iran. Geological Survey of Iran,2004,619 pp
[4] M.B.Allen, J.A.JacksonandR.Walker, Late Cenozoic reorganization of the Arabia-Eurasia collision and the comparison of short-
term and long-term deformation rates. Tectonics, v. 23, art. no. TC2008, doi: 10.1029/2003 TC001530,2004
[5] International Soil and Rock Mechanics ISRM, In: Brown ET (Ed.), Rock Characterization, Testing and Monitoring, ISRM
Suggested Methods. Pergamon Press, Oxford, 1981,p 211
[6] D.U.DeereandR.P.Miller,Engineering classification and index properties of intact rock.Tech. Rept. No. AFWL-TR-65-116, Air
Force Weapons Lab., Kirtland Air Force Base, New Mexico, 1966,308 pp
[7] E.HoekandT.Brown, The Hoek–Brown failure criteria—a 1988 update, In: Proc. 15th Canadian Rock Mech. Symp, 1988,31–38
[8] Z.T.Bieniawski, Engineering Rock Mass Classification.Wiley, New York.1989,251pp
[9] N.R.Barton, R.LienandJ.Lunde,Engineering classification of rock masses for the design of tunnel support. Rock Mech, 4,1974,
189–239
[10] E.Hoek andT.Brown, Practical estimates of rock mass strength. Int. J. Rock Mech. Min. Sci, 34 (8), 1997, 1165–1186