[1] Anhui Univ Technol, Civil Engn & Architecture, Maanshan 243002, Anhui, Peoples R China
[2] China Univ Min & Technol, State Key Lab Coal Resources & Safe Min, Xuzhou 221116, Jiangsu, Peoples R China
[3] China Univ Min & Technol, Key Lab Gas & Fire Control Coal Mines, Xuzhou 221116, Jiangsu, Peoples R China
[4] Anhui Univ Technol, Sch Math & Phys, Maanshan 243002, Anhui, Peoples R China