分类号: X936 TD712Study on gas desorption law of mining pressure relief areaLI Yao-bin , LI Zhong-qing , LIU Jian (1. Key Laboratory of Mining Coal Safety and Efficiently Constructed by Anhui Province and Ministry of Education, Huainan 232001, China; 2. School of Energy and Safety, Anhui University of Science and Technology, Huainan 232001, China)Abstract:To find the gas desorption law of mining pressure relief area, mathematical analysis and formula deduction of gas desorption law of mining pressure relief area are carried out, equivalent negative pressure drive effect and the theory maximum stress of gas desorption are found. And then combined with field test analysis, the gas desorption law is verified. The results showed that the coal stress variation of mining pressure relief area is the original impetus of gas desorption,and due to equivalent negative pressure drive effect the peak gas pressure shows little behind the peak coal stress, and peak value of gas pressure is less than the theory maximum.
Keyword:pressure relief; gas desorption; gas pressure; coal stress; equivalent negative pressuredrive effect