NUMERICAL SIMULATION ON EFFECT OF GAS DRAINAGE IN COAL SEAM UNDER HYDRAULIC FRACTURING
Methane drainage has become an integral part of modern coal mining operations in low-permeable coal seams, thus some measures such as hydraulic fracturing and stress reducing are used to improve the permeability of coal scams and secure the safety and effectiveness of coal mining activities. In the paper, a coupled gas flow model which incorporated stress, damage and permeability evolution was briefly described and employed to simulate the changes of gas pressure around the boreholes in low-permeable coal seam under hydraulic fracturing, and the seepage mechanism of gas flow was analyzed. Numerical simulations show that the content of gas release was remarkably increased and the gas pressure around the borehole was obviously reduced, which is well agreement with the field findings. The work in the present paper is of great significance to further investigate and understand the mechanism of gas permeability evolution and the mechanism of gas drainage under hydraulic fracturing in both theory and practice.
TIAN-HONG YANG TAO XU CHUN-AN TANG
School of Resources and Cviling Engineering, Northeastern University Shenyang, 110004, P.R China Center for Material Failure Modeling Research, Dalian University, Dalian, 116622, P.R.China Center for Rock Instability and Seismicity Research, Dalian University of Technology Dalian, 116024,
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
599-604
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）