Peng Hong Fan1,2,3,4, Bai Sheng Nie This email address is being protected from spambots. You need JavaScript enabled to view it.1,3,4 and Bin Peng1,3,4

1China University of Mining & Technology (Beijing), School of Resource and Safety Engineering, Beijing 100083, P.R. China
2Shanxi Institute of Technology, Department of Mining Engineering, Shanxi 045000, P.R. China
3China University of Mining and Technology (Beijing), Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, Beijing 100083, P.R. China
4China University of Mining & Technology (Beijing), State Key Laboratory of Coal Resources and Safe Mining, Beijing 100083, P.R. China


Received: March 9, 2017
Accepted: July 30, 2017
Publication Date: December 1, 2017

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Combined with underground engineering practice of gas disaster control, the permeability evolution of coal under mechanical characteristics of three mining layouts is studied. According to the abutment pressure distribution of three mining layouts (protective coal seam, top-coal caving and non-pillar mining), the seepage experiment of gas-containing coal under stress paths of three mining layouts is implemented with a self-developed triaxial seepage device. The results show that the permeability variation of coal under three mining layouts is different, the relationship is revealed between the stress state and the permeability changes of coal. The research results will provide some basic theories for the technology of coal and gas simultaneous extraction as well as gas disaster control in the exploiting area of underground coal mines.

Keywords: Three Mining Layouts, Mechanical Characteristics, Stress Path, Permeability, Coal Mining


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