Results 91 to 100 of about 435,468 (196)

Dynamic prediction of coal and gas outburst risk based on quantitative analysis of stress–energy evolution and adaptive correction

Deep Underground Science and Engineering, EarlyView.
This study quantitatively analyzed the spatiotemporal evolution of stress redistribution ahead of the working face by integrating coal seam distribution, tectonic stress anomalies, gas pressure, and mining‐induced disturbances. An R‐value criterion for coal and gas outburst (CGO) risk assessment was established based on energy principles.
Yingjie Zhao, Xueqiu He, Dazhao Song, Liming Qiu, Minggong Guo, Jie Liu, Qiang Liu, Yi Zhu   +7 more
wiley   +1 more source

Tectonic control law and zoning division of coalmine gas occurrence in Shanxi Province

Energy Exploration & Exploitation
The frequent occurrence of gas disasters in coal mines is primarily attributed to an unclear understanding of gas occurrence laws. Tectonic control law of coalmine gas occurrence in Shanxi Province was analyzed by utilizing massive gas-geology data of ...
Zhigang Song, Degang Shi, Caifang Wu, Tianrang Jia, Xiaolei Liu, Jiangwei Yan, Weiwei Li, Munan Wu   +7 more
doaj   +1 more source

Research on energy instability of composite coal based on unsteady diffusion to cause disaster

Meitan kexue jishu
In China, due to the influence of geological tectonics, the phenomenon of primary structural coal and tectonic coal stratification exists in many coal seams.
Yujin QIN, Weiwei SU, Shouqing LU, Mingjie LI   +3 more
doaj   +1 more source

Real‐time multiscale characterization of water migration in deep coal under stepwise pressure‐increasing injection: Combined low‐field nuclear magnetic resonance and multifractal approach

Deep Underground Science and Engineering, EarlyView.
The graphical abstract illustrates the real‐time multiscale characterization of water migration in deep coal under stepwise pressure‐increasing injection. Under in‐situ hydrostatic pressure, the water invasion front advances progressively along the axial direction as the injection pressure increases stepwise, tracked in real time by nuclear magnetic ...
Lei Song, Hongwei Zhou, Zelin Liu, Yimeng Wang, Xiaohai Zhang, Mingyuan Lu, Yang Ju   +6 more
wiley   +1 more source

Coal utilization study

, 1988
"October, 1988."EXECUTIVE SUMMARY -- BASIS FOR THE STUDY -- THE KANSAS COAL MINING INDUSTRY -- UTILITY COAL MARKET IN KANSAS -- INDUSTRIAL COAL MARKET -- COMMERCIAL, RESIDENTIAL, EXPORT POTENTIAL -- COMPETITIVE ANALYSIS -- THE OUTLOOK FOR KANSAS COAL ...
J.E. Sinor Consultants, Inc.
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Study on Pore Structure of Tectonically Deformed Coals by Carbon Dioxide Adsorption and Nitrogen Adsorption Methods

Energies
The study of pore characteristics in tectonic coal is essential for a deeper understanding of gas diffusion, seepage, and other transport processes within coal seams, and plays a crucial role in the development of coalbed methane resources.
Jinbo Zhang, Huazhou Huang, Wenbing Zhou, Lin Sun, Zaixing Huang   +4 more
doaj   +1 more source

Intelligent inversion analysis of dilatancy angle of surrounding rock based on the force of negative Poisson's ratio anchor cable

Deep Underground Science and Engineering, EarlyView.
An intelligent inversion framework estimates the dilatancy angle of the surrounding rock from negative Poisson's ratio (NPR) anchor cable force histories. Numerical tunnel‐excavation simulations generate force data across a controlled dilatancy‐angle range, which are mapped to the target parameter using a sequential convolutional neural network (CNN ...
Li Cui, Zhihao Sun, Lei Wang, Zhenmin Qi, Jianjun Ma, Xiaoming Sun   +5 more
wiley   +1 more source

Study on Fluid Pressure in Tubing, Dynamic Stress in Reservoir, and Fracture Propagation Morphology During Variable‐Rate Hydraulic Fracturing

Energy Science &Engineering, EarlyView.
Variable‐rate hydraulic fracturing can induce unsteady flow in the tubing, thereby generating fluctuating fluid pressure near the bottom‐hole reservoir. Dynamic stress is generated in the reservoir under the action of fluctuating fluid pressure and propagates as stress waves.
Zhu Ge, Wang Chaojing, Li Weicheng
wiley   +1 more source

Lehigh Coal and Navigation Company Records - Item 736: Detail of Jag Bolt

, 1910
This schematic shows the detail plan of a jag bolt by the Engineering Division of the Coal Department of the Lehigh Coal and Navigation Company. The material used is soft steel.

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Burial diagenesis, organic maturation and tectonic loading in the French subalpine chains, S.E. France [PDF]

, 1992
The French Subalpine Chains of southeastern France lie on the western edge of the Western Alps. The area is the foreland fold/thrust belt to the main orogenic hinterland to the east.
Moss, Stephen James
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