煤与瓦斯突出过程中气压时空演化规律_张超林.pdfVIP

38 1 Vol.38 No. 1 2017 1 Rock and Soil Mechanics Jan. 2017 DOI 10.16285/j.rsm.2017.01.011 1, 2 1, 2, 3 1, 2 1, 2 1, 2 1, 2 1. 400044 2. 400044 3. 400037 8.79% 69.2% 130 mm/s TD 325 A (2017) 01 0081 10 Temporospatial evolution of gas pressure during coal and gas outburst ZHANG Chao-lin1, 2, PENG Shou-jian1, 2, 3, XU Jiang1, 2, GENG Jia-bo1, 2, YANG Hong-wei1, 2, LUO Xiao-hang1, 2 1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; 2. State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam, Chongqing University, Chongqing 400044, China; 3. Chongqing Research Institute of China Coal Technology and Engineering Group Corp., Chongqing 400037, China Abstract: Coal and gas outburst is one of the most serious disasters in coal mining. In recent years, with the increasing of mining depth, the in-situ stress and gas pressure increase, and thus the coal and gas outbursts occur more and more frequently. At the same time, the in-situ stress in coal changes with mining activities; the “three zones” are formed, i.e, stress relaxation zone, stress concentr