Energy Criterion for the Initiation of Coal and Gas Outbursts in Horizontal Coal Laneway
The energy criterion for the initiation of coal and gas outburst in horizontal coal laneway was studied within spherical coordinate system in this paper. Firstly, the stress distribution around coal heading was studied. Then four kinds of energy closely correlative with coal and gas outburst were studied which include: (a) the elastic potential released by coal, (b) the intrinsic gas energy which include expansion gas energy and energy released during gas desorbing, (c) crushing energy consumed during coal and gas outburst, which was obtained from impact crushing experiments of coal samples and screen results of outburst coal, (d) coal kinetic energy required during coal and gas outburst. Finally the energy criterion for the initiation of coal and gas outburst was suggested based on relationship analysis of the four kinds of energy. It is indicated that coal and gas outburst is governed by many factors such as in-situ stress, gas pressure, Protodyakonov coefficient, excavation footage, etc. The results are useful and can be used in practice for mine safety.
coal and gas outburst horizontal coal laneway energy criterion
HU Qianting ZHAO Zhigang CHENG Guoqiang TAN Yunliang
Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technolog Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technolog
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
1269-1274
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）