Results 141 to 150 of about 12,324 (191)

Research on the Construction of a Radial Seepage Model for Porous Media and Simulation of the Response Mechanism in Different Zones. [PDF]

ACS Omega
Wen Z, Wu H, Li Y, Yang S, Zhao Y, Guo S.   +5 more
europepmc   +1 more source

Gas Pressure Evolution Characteristics in Multiple Coal Seams during Cross-Seam Borehole Extraction at Different Angles. [PDF]

ACS Omega
Chen Y, Jiang B, Chu T, Chen X, Wu J, Li X.   +5 more
europepmc   +1 more source

Outbursts of Coal and Gas and Preventive Measures

Outbursts of Coal and Gas and Preventive Measures
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Gas emission under coal and gas outbursts

Journal of Mining Science, 2011
The paper considers the conditions of methane hydrate existence in coal seams. The authors estimate volumes of gas emission in a fractured coal layer upon a drop in gas pressure. The authors also give the assessment of outburst hazard of coal seam edge zone.
S. A. Shepeleva, V. V. Dyrdin
openaire   +1 more source

Application of Coal Mechanics in Coal and Gas Outbursts

2021
Coal and gas outbursts are geological failures that occur in underground drainage or mining, and consist of the ejection of thousands of coal/rock pieces and a considerable amount of gas into a limited working space within a short period.
Yuanping Cheng, Qingquan Liu, Ting Ren
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The Power Source for Coal and Gas Outburst

Journal of Mining Science, 2019
The experiments were carried out connected with nitrogen adsorption on coal samples. The aim was to find out the power source for coal and gas outburst. The experimental data were fitted by the function of f(x)=axb. The total volume of micropores and the degree of micropore volume filled by nitrogen were calculated by the Dubinin-Radushkevich equation.
Lin Hong, Dameng Gao, Jiren Wang, Dan Zheng   +3 more
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Expansion energy of coal gas for the initiation of coal and gas outbursts

Fuel, 2019
Abstract The study of coal and gas outburst mechanisms is necessary for the safety and efficiency in mining. Gas expansion energy is a major factor in outburst initiation. However, the amount of coal gas participating in outburst initiation is hard to estimate. In this study, considering the effect of coal damage and the environmental pressure change
Fenghua An, Yu Yuan, Xiangjun Chen, Zhiqiang Li, Liyang Li   +4 more
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Deformation Analysis for Coal and Gas Outburst Cavity

Applied Mechanics and Materials, 2011
Outburst cavity formed during coal and gas outburst can be pear shaped, elliptical, or just like an irregularly elongated ellipsoid, its capacity is always smaller than the volume of ejected coal. And the gas emission quantity is almost 4 to 10 times as gas content in ejected coal. These are two different expressions of the same problem.
Qian Ting Hu, Wen Bin Wu, Guo Qiang Cheng   +2 more
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Mine Coal and Gas Outburst Prediction Area

Applied Mechanics and Materials, 2012
In this paper, based on geological power division method of qidong well find out fault block coal mine, determined the change law of the ground stress coal mine, combining geological structure distribution situation, distribution, coal seam gas igneous rock and the pressure distribution rule, the structure of coal change situation analysis, USES the ...
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Energy model of sudden gas and coal outburst

2015 International Conference on Mechanical Engineering, Automation and Control Systems (MEACS), 2015
The paper discuses sudden gas and coal outburst in zones with an increased gas yield. Theoretical models of the outbursts are offered based on the theory of catastrophes, statistical physics and thermodynamics. Relationship between gas content of coal seams and experimentally identified by a geophysical method of research is specified. It justifies the
N. Drizhd, O. Fofanov, V. Dolgonosov, V. Yavorskiy   +3 more
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