Results 131 to 140 of about 1,327 (178)

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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Prediction of the Coal and Gas Outburst by Neural Network

2009 Second International Symposium on Computational Intelligence and Design, 2009
Back-propagation neural network model was developed to predict the coal and gas outburst. After trained, the artificial neural network model was used to predict the coal and gas outburst of several samples. Moreover, ANN model was also used to analyse the quantitative effects of influencing factors on the coal and gas outburst.
Wei You, Kun Wang, Huixiao Li, Yang Jia, Xiaoqin Wu, Yaning Du   +5 more
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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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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
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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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Discussion on the Outburst Identification of Coal and Gas

Applied Mechanics and Materials, 2013
Problems existing in identification index, identification scope, identification process and other aspects were analyzed and discussed by combining the present situation of identification work of coal and gas outburst in China in this study, and targeted rationalization proposals were proposed.
Shao Quan Li, Yi Fu Liu, Feng Wang, Guo Hong Nie, Qing Song Li   +4 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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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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Study on the intensity of coal and gas outburst

2004
The indexes of forecasting coal and gas outburst intensity are presented according to the spherical shell losing stability theory about outburst mechanism.In laboratory,outburst simulated tests have been carried out for many times.And the linear equation which can be used to forecast outburst intensity has been established by means of pluralistic ...
Chenglin Jiang, Jun Tang, Songli Chen
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