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Articles 2881 - 2910 of 4587
Full-Text Articles in Mining Engineering
Genesis And Geochemical Characteristics Of Coalbed Methane From Taiyuan Formation In Sijiazhuang Mine Field Of Yangquan Mining Area, Yu Zhenfeng, Hao Chunsheng, Yang Changyong, Yao Jinbao, Wang Wei, Ji Changjiang
Genesis And Geochemical Characteristics Of Coalbed Methane From Taiyuan Formation In Sijiazhuang Mine Field Of Yangquan Mining Area, Yu Zhenfeng, Hao Chunsheng, Yang Changyong, Yao Jinbao, Wang Wei, Ji Changjiang
Coal Geology & Exploration
In order to study the geochemical characteristics and the genesis of CBM of Sijiazhuang mine field in Yangquan mining area, the in-site desorption test of coal core samples from the main gas-producing seams(seams 8, 9 and 15) from Permo-Carboniferous Taiyuan Formation was carried out systematically, gas samples were collected to conduct component and carbon isotope analysis. The results indicated that the gas content of seam 8 was higher than that of seam 9, on the plan the gas content of seam 15 was uneven, in some parts there was almost no gas. During the whole desorption, the gas component content …
The Matching Of Gas Production Curve Characteristic And Reservoir Conditions In Vertical Coalbed Methane Wells, Han Wenlong, Wang Yanbin, Liu Du, Chang Hong, Ding Tao
The Matching Of Gas Production Curve Characteristic And Reservoir Conditions In Vertical Coalbed Methane Wells, Han Wenlong, Wang Yanbin, Liu Du, Chang Hong, Ding Tao
Coal Geology & Exploration
The matching of coalbed methane(CBM) production curve type and geological conditions directly affects the gas production. Based on dividing gas production curves types of vertical CBM wells in the southern block of Shizhuang in Qinshui basin over 4 years, the characteristics of gas production curve were analyzed. The matching of gas production curve with reservoir parameters was further analyzed. The paper discovered and divided the gas production curve into four types:type of fast rising of single peak, type of stable rising of single peak, bimodal type of being low later and bimodal type of being high later. The original permeability, …
Application Of Sec Dynamic Reserves Evaluation Method In Coalbed Methane Field: A Case From Hancheng Block In Ordos Basin, Yi Wei, Xiong Xianyue, Cao Yimin, Ding Rong
Application Of Sec Dynamic Reserves Evaluation Method In Coalbed Methane Field: A Case From Hancheng Block In Ordos Basin, Yi Wei, Xiong Xianyue, Cao Yimin, Ding Rong
Coal Geology & Exploration
At present, all the SEC reserves evaluation of coalbed methane fields uses dynamic assessment methods. In the process of evaluation, the parameters and calculation results are various. In order to solve this problem, this paper takes the Hancheng block in Ordos basin as an example, a series of evaluation methods adapted to the production characteristics of coalbed methane have been comprehensively applied, optimizing various parameters, and summarizing the law of decline. The results show that geological units are divided according to tectonic conditions, and on this basis, evaluation units are divided according to development effect, which can objectively and reasonably …
Prediction Of The Height Of Water Flowing Fractured Zone Under Subcritical Mining Based On Dimensional Analysis, Lou Gaozhong, Guo Wenbing, Gao Jinlong
Prediction Of The Height Of Water Flowing Fractured Zone Under Subcritical Mining Based On Dimensional Analysis, Lou Gaozhong, Guo Wenbing, Gao Jinlong
Coal Geology & Exploration
In order to accurately predict the height of water flowing fractured zone under subcritical mining, mining thickness M, mining depth H, inclined length of working face L, dip angle of coal seam α, overburden mechanical properties R, overburden structure characteristics S were selected as the main influencing factors on the height of water flowing fractured zone under subcritical mining. Dimensionless relations between the height of water flowing fractured zone and M, H, L, α, S were established by dimensional analysis. Based on 30 sets of measured data, the optimal function relation of dimensionless relation was …
Ga_Svm_Adaboost Model For Prediction Of Earthquake-Induced Sandy Soil Liquefaction, Mao Zhiyong, Huang Chunjuan, Lu Shichang
Ga_Svm_Adaboost Model For Prediction Of Earthquake-Induced Sandy Soil Liquefaction, Mao Zhiyong, Huang Chunjuan, Lu Shichang
Coal Geology & Exploration
In order to predict the liquefaction of sand, the seismic intensity, groundwater level, covering thickness, standard number, average particle size, landform, soil quality and inhomogeneity coefficient are selected as influencing factors. Genetic algorithm(GA) is used to optimize the parameters of support vector machine(SVM) by using correlation analysis and factor analysis model, and combining with Adaboost iterative algorithm, the GA_SVM_Adaboost model for predicting the liquefaction of sand is established. 329 sets of survey data of sandy liquefaction site in Tangshan earthquake were used to train the model, and 68 samples of sandy liquefaction data were predicted by using the good model. …
Development Of High Temperature Borehole Inclinometer, Qu Zhaogui, Gong Mingmao, Zhou Ce, Wang Guangzhai
Development Of High Temperature Borehole Inclinometer, Qu Zhaogui, Gong Mingmao, Zhou Ce, Wang Guangzhai
Coal Geology & Exploration
In the detection of high-temperature and high-pressure dry heat rock drilling location trajectory, the instrument has some problems, such as poor performance, poor stability, low measurement accuracy and large energy consumption. A set of high temperature borehole inclining device is designed to solve the problem of high temperature and high pressure measurement deviation and temperature measurement. Adopt high temperature resistant components, design control and measurement circuit. Automatic intermittent power supply is adopted to reduce heat dissipation and power consumption. The design of heat preservation pipe and pressure detection pipe is carried out by using ANSYS finite element software to conduct …
Experimental Study On The Influence Of Well Inclination Angle Of Coalbed Methane Well On The Cementation Strength Of Cement-Formation Interface, Gu Jun, Li Linwei, Sun Dexing
Experimental Study On The Influence Of Well Inclination Angle Of Coalbed Methane Well On The Cementation Strength Of Cement-Formation Interface, Gu Jun, Li Linwei, Sun Dexing
Coal Geology & Exploration
In order to control the problem of water channeling in the process of coalbed methane(CBM) production, based on the self-designed test device and method, the test data of the shear strength at cement-aquiclude interface (CAI) is obtained under the conditions of well inclination of 0°, 30°, 60° and 90°. The mechanism of the influence of inclination angle on the shear strength at CAI is analyzed. The results show that the shear strength at CAI decreases with the increase of the inclination angle. The reason is that as the inclination angle increases, the upper part of the mud cake ring becomes …
Application Of Wire Line Coring Technique In Overburden Drilling, Li Baijun, Zou Run, Guo Chao
Application Of Wire Line Coring Technique In Overburden Drilling, Li Baijun, Zou Run, Guo Chao
Coal Geology & Exploration
In order to improve the drilling efficiency of two oil and gas geological survey wells "Jitaodi 1" and "Ji Bai Di 1" in Baicheng area of Jilin Province, wireline coring technique was applied in overburden drilling. Based on the lithological characteristics of the drilled strata, combined with the technological characteristics of core extraction by lifting the drill pipe and wireline core extraction, by designing the bit, drilling flushing fluid and by improving drilling procedure parameters, drilling tool nozzle flow channel, the wireline coring drilling method has been successfully applied in drilling overburden strata(about 1 100 m thick). Compare with the …
Using Numerical Models Of Dewatering At Coal Ash Impoundments To Understand Cost And Schedule, Peter Bell, Joel Thompson, Don Fuller
Using Numerical Models Of Dewatering At Coal Ash Impoundments To Understand Cost And Schedule, Peter Bell, Joel Thompson, Don Fuller
World of Coal Ash Proceedings
No abstract provided.
Investigating Ccr Units And Evaluating The Physical Properties Of Ponded Ccr, David Skeggs, Zahra Aghazadeh, Rachel Combs
Investigating Ccr Units And Evaluating The Physical Properties Of Ponded Ccr, David Skeggs, Zahra Aghazadeh, Rachel Combs
World of Coal Ash Proceedings
No abstract provided.
Demonstration Of “No Migration” Alternative Performance Standard For Ccr Facilities In Arid To Semi- Arid Regions Using Unsaturated Zone Modeling, James Aiken, Katy Lindstom
Demonstration Of “No Migration” Alternative Performance Standard For Ccr Facilities In Arid To Semi- Arid Regions Using Unsaturated Zone Modeling, James Aiken, Katy Lindstom
World of Coal Ash Proceedings
No abstract provided.
Coal Combustion Residuals Management Using Geotextile Containers- Considerations For Various Options, Randall Wilcox, Gregg Lebster, Bryan Hamilton, Thomas Stephens
Coal Combustion Residuals Management Using Geotextile Containers- Considerations For Various Options, Randall Wilcox, Gregg Lebster, Bryan Hamilton, Thomas Stephens
World of Coal Ash Proceedings
No abstract provided.
State Vs Federal Ccr Rule Regulations: Comparisons And Impacts, Nicole Kron, Eric Nelson
State Vs Federal Ccr Rule Regulations: Comparisons And Impacts, Nicole Kron, Eric Nelson
World of Coal Ash Proceedings
No abstract provided.
Continuous, Real-Time Tss Monitoring Verifies Effluent Quality And Coal Ash Management Performance While Reducing Compliance Costs, Dave Fraley, Chris Bauman, Dave Donahue
Continuous, Real-Time Tss Monitoring Verifies Effluent Quality And Coal Ash Management Performance While Reducing Compliance Costs, Dave Fraley, Chris Bauman, Dave Donahue
World of Coal Ash Proceedings
No abstract provided.
Effect Of Coal Fly Ash On Agricultural Crops :Second Phase Showcase Project On Use Of Fly Ash In Agriculture In And Around Thermal Power Station Areas Of National Thermal Power Corporation Ltd., India., K. Arivazhagan, M. Ravichandran, S.K. Dube, V.K. Mathur
Effect Of Coal Fly Ash On Agricultural Crops :Second Phase Showcase Project On Use Of Fly Ash In Agriculture In And Around Thermal Power Station Areas Of National Thermal Power Corporation Ltd., India., K. Arivazhagan, M. Ravichandran, S.K. Dube, V.K. Mathur
World of Coal Ash Proceedings
No abstract provided.
Advantages Of Single Source Contracting In-Plant Ccr Services, Kevin Foody, Marcella Funderburg, Blake Whittington
Advantages Of Single Source Contracting In-Plant Ccr Services, Kevin Foody, Marcella Funderburg, Blake Whittington
World of Coal Ash Proceedings
No abstract provided.
Design And Construction Of A Ccr Landfill Adjacent To The Missouri River, Thomas Gredell, Jeffrey Fouse, Jay Ellington
Design And Construction Of A Ccr Landfill Adjacent To The Missouri River, Thomas Gredell, Jeffrey Fouse, Jay Ellington
World of Coal Ash Proceedings
No abstract provided.
Geochemical Tools For Groundwater Monitoring At Coal Fired Utilities, Jeff Gillow, Bruce Sass, Hari Parthasarathy
Geochemical Tools For Groundwater Monitoring At Coal Fired Utilities, Jeff Gillow, Bruce Sass, Hari Parthasarathy
World of Coal Ash Proceedings
No abstract provided.
Bottom Ash Handling Conversions – Lessons Learned, Dustin Doerr
Bottom Ash Handling Conversions – Lessons Learned, Dustin Doerr
World of Coal Ash Proceedings
No abstract provided.
Encapsulation Of Thermoevaporation Brines Using Coal Combustion Residuals, Dale Prentice, Kirk Ellison, Gaurav Sant
Encapsulation Of Thermoevaporation Brines Using Coal Combustion Residuals, Dale Prentice, Kirk Ellison, Gaurav Sant
World of Coal Ash Proceedings
No abstract provided.
Recycling Of Coal Ash In Agriculture: Use Of Vermicomposting Biotechnology, G.N. Chattopadhyay, Gourab Roy, Wasim Iftikar
Recycling Of Coal Ash In Agriculture: Use Of Vermicomposting Biotechnology, G.N. Chattopadhyay, Gourab Roy, Wasim Iftikar
World of Coal Ash Proceedings
No abstract provided.
Surface Water And Groundwater Mixing In Alluvial Floodplains: A Significant Issue For Understanding Contaminant Transport At Coal Ash Facilities Adjacent To Rivers, Joel Thompson, Peter Bell, John Griggs
Surface Water And Groundwater Mixing In Alluvial Floodplains: A Significant Issue For Understanding Contaminant Transport At Coal Ash Facilities Adjacent To Rivers, Joel Thompson, Peter Bell, John Griggs
World of Coal Ash Proceedings
No abstract provided.
Alternate Source Demonstration Considerations Within The Appalachian Basin, Joseph Robb, Larry Mastera
Alternate Source Demonstration Considerations Within The Appalachian Basin, Joseph Robb, Larry Mastera
World of Coal Ash Proceedings
No abstract provided.
Locating And Permitting A Ccr Landfill Adjacent To The Missouri River, Paul Reitz, Thomas Gredell, Jay Ellington
Locating And Permitting A Ccr Landfill Adjacent To The Missouri River, Paul Reitz, Thomas Gredell, Jay Ellington
World of Coal Ash Proceedings
No abstract provided.
Is Zero Solid Waste Possible For Fly Ash Produced From Any Coal-Fired Power Plant?, Jinder Jow, Yang Dong, Shuqiang Ding, Li Qiao
Is Zero Solid Waste Possible For Fly Ash Produced From Any Coal-Fired Power Plant?, Jinder Jow, Yang Dong, Shuqiang Ding, Li Qiao
World of Coal Ash Proceedings
No abstract provided.
Groundwater Corrective Action Assessment Using Fate And Transport Modeling, Brian Hennings, Glenn Luke, Jacob Walczak
Groundwater Corrective Action Assessment Using Fate And Transport Modeling, Brian Hennings, Glenn Luke, Jacob Walczak
World of Coal Ash Proceedings
No abstract provided.
The Application Of Natural Attenuation At Coal Combustion Residual (Ccr) Sites, Ryan Fimmen, Allison Kreinberg
The Application Of Natural Attenuation At Coal Combustion Residual (Ccr) Sites, Ryan Fimmen, Allison Kreinberg
World of Coal Ash Proceedings
No abstract provided.
Coal Ash 2.0: The Calculus Of The Ore Body, Claudio Arato
Coal Ash 2.0: The Calculus Of The Ore Body, Claudio Arato
World of Coal Ash Proceedings
No abstract provided.
Extensive Real Time Monitoring Of Ash Response To Construction-Induced Activity, Anita Perry, Alex Rudy, Kenny Campbell, Ryan Smith
Extensive Real Time Monitoring Of Ash Response To Construction-Induced Activity, Anita Perry, Alex Rudy, Kenny Campbell, Ryan Smith
World of Coal Ash Proceedings
No abstract provided.
Alkali-Silica Reaction Of Geopolymer Concrete Made Of Circulating Fluidized Bed Combustion Fly Ash, Chang-Seon Shon, Dong-Un Lee
Alkali-Silica Reaction Of Geopolymer Concrete Made Of Circulating Fluidized Bed Combustion Fly Ash, Chang-Seon Shon, Dong-Un Lee
World of Coal Ash Proceedings
No abstract provided.