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

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

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