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Propagation Mechanism of Coal Rock Fracture under Gas Pressure
Advanced Materials Research, 2011The failure of coal rock under gas pressure and in-situ stress is an inevitable stage of coal and gas outburst. The propagation mechanism of coal rock fracture under gas pressure is studied in this paper using fracture mechanics. The expression of normal stress and shear stress is given first with the simplification that the fracture is elliptical ...
Zhi Gang Zhao, Di Di Gan
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The Research on Rheology Mechanism of Coal-rock Containing Gas
AIP Conference Proceedings, 2008Rheology mechanism is studied on the whole rheology process of coal‐rock containing gas using rock rheology apparatus in triaxial compression. Experiment shows that there are 3 typical creeping stages including instantaneous creeping stage I, stable development of deformation stage II and accelerated deformation to failure stage III.
Chen Wenxue +7 more
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The mechanism of damage in gas-bearing coal–rock combination bodies and gas seepage in coals
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2019ABSTRACTWith the gradually exhausted shallow coal resources, many coal mines have been carried forward to the deep mining stage.
Feng Du +4 more
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Experimental test and particle mechanical analysis of gas adsorption-induced coal rock degradation
Powder Technology, 2020Abstract In order to more accurately analyze the coal rock degradation arising from gas adsorption, a new method was proposed based on particle discrete element theory. The degradation test and numerical simulation were used to verify the applicability of this method.
Hanpeng Wang +5 more
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Geotechnical and Geological Engineering, 2021
In this paper, the mechanical and permeability experiments of containing-gas raw coal and sandstone samples under conventional triaxial compression were carried out by using the thermal fluid solid coupling triaxial servo seepage experimental device. The results show that: the peak strength of containing-gas coal and rock increases linearly with the ...
Bang-an Zhang +2 more
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In this paper, the mechanical and permeability experiments of containing-gas raw coal and sandstone samples under conventional triaxial compression were carried out by using the thermal fluid solid coupling triaxial servo seepage experimental device. The results show that: the peak strength of containing-gas coal and rock increases linearly with the ...
Bang-an Zhang +2 more
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Influence of fracture structure on gas flow characteristics in fractured coal rock mass
Physics of FluidsTo establish a permeability prediction model applicable to deep coal seam gas drainage engineering and accurately describe the fracture structure characteristics of fractured coal rock bodies and assess the impact of different fracture parameters on gas permeability characteristics, three-dimensional (3D) reconstruction and quantitative ...
Huan Zhang +7 more
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Environmental Earth Sciences, 2017
With the development of deep mining in recent years, coal and gas compound dynamic disasters become increasingly serious. In this study, uniaxial and triaxial compression tests were conducted on gas-bearing coals, coal–sandstone combined bodies and coal–mudstone combined bodies and the permeabilities in the triaxial tests were measured simultaneously ...
Kai Wang +4 more
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With the development of deep mining in recent years, coal and gas compound dynamic disasters become increasingly serious. In this study, uniaxial and triaxial compression tests were conducted on gas-bearing coals, coal–sandstone combined bodies and coal–mudstone combined bodies and the permeabilities in the triaxial tests were measured simultaneously ...
Kai Wang +4 more
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A permeability model for gas-bearing coal-rock under internal stress and gas adsorption effects
Process Safety and Environmental ProtectionYangyang Guo +7 more
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