Failure mechanism of coal and gas outburst initiation
Based on the concept that the initiation of coal and gas outburst is the failure of coal and rock mass, the relevant stability theory is applied to build a nonlinear dynamics model of outburst initiation, and the failure mechanism of outburst initiation is systematically analyzed. The result show that the outburst initiation model can be described by a nonlinear partial differential equation set, and the outburst initiation failure depends on the solution stability of this equation set, this question can be strictly defined and determined by Liapunovs stability theory. The influencing factors of outburst initiation mainly include the structure forms, material properties and load patterns of the coalrock mass system. The occurrence of abutment pressure and limit equilibrium zone in front of working face exacerbates the potential of outburst. There are 4 canonical forms of coal wall failure: extrusion, spallation, collapse and breakage. Outburst initiation is an integration of material failure and structure flexion, they abide by specific energy condition accordingly, but outburst initiation condition cant be described by a simple energy equation.
coal and gas outburst mechanism preparation initiation failure
Jin Hongwei Hu Qianting Liu Yanbao
National Key Laboratory of Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing 400037, China Chongqing Research Institute, China Coal Research Institute, Chongqing 400037, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
1132-1140
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）