Results 161 to 170 of about 12,296 (207)

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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Simulation of coal and gas outbursts in outburst-prone zones of coal seam

The problem of mining safety in outburst-prone coal seams has not yet been ful-ly studied and resolved, so research related to outbursts continues to be relevant for many coal-mining countries. The purpose of this work is to study the coupled pro-cesses of elastoplastic deformation of a coal seam, methane filtration and desorption, which occur in the ...
Viktoriia Krukovska, Oleksandr Krukovskyi   +1 more
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The role of coal strength in coal and gas outbursts

Physics of Fluids
Coal strength is one of essential factor influencing the occurrence of coal and gas outbursts (CGOs). In order to explore the laws of CGOs, simulation tests with different coal strengths were carried out under a self-developed CGO device. The results show that as the coal strength increases, the relative outburst strength decreases.
Han Meng, Yuzhong Yang, Wei Hou, Fenghua An, Haijun Guo, Xinwang Li, Fei Wang, Longlong Pang, Rui Zhang, Li Chen, Lichao Cheng   +10 more
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A mechanism of outbursts of coal and gas

Mining Science and Technology, 1984
Abstract Rock and gas pressures combine to cause outbursts of coal and gas. The actions and interactions of geological factors, mining factors and intermediary events during the phenomenon are described.
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Prediction Technology of Coal and Gas Outburst in Xuandong Coal Mine

Advanced Materials Research, 2011
Based on the complicated geological conditions of coal seam in Xuandong Coal Mine, such as deep burial depth, high gas content, magmatic rock intrusion and so on, the distribution regularities of magmatic rock, gas and geological structures were analyzed and studied.
Sheng Shan Zhao, Wei Dong Pan, Xin Wang, Jia Dun Liu   +3 more
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