1.Henan Provincial Collaborative Innovation Center of Coal Safety Production, Jiaozuo , China;2.Cultivation Base,Provincial and Ministry Joint Established State Key Lab-Henan Provincial Key Lab of Gas Geology and Gas Control, Henan Polytechnic University,Jiaozuo , China;3.School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo , China

为了研究深部含瓦斯煤层复合动力灾害的发生机理，分别从煤岩力学性质、声发射特性和能量耗散角度进行了分析。采用RMT-150C型岩石力学试验机构成的含瓦斯煤单轴压缩试验系统，结合DS5型全信息声发射信号分析仪，研究了不同瓦斯压力下煤样力学指标和声发射指标的演化规律，研究结果表明：瓦斯压力由0 MPa升高到2 MPa，煤样的抗压强度降低了31%，弹性模量降低了32.1%，泊松比升高了46.9%；煤样的动态破坏时间、弹性能指数和冲击能指数都随着瓦斯压力的升高而减小，煤样的冲击倾向性也由强冲击倾向性向弱冲击倾向性变化；煤样声发射信号累计计数和累计能量分别降低了55.1%和58.3%；从能耗角度分析，随着瓦斯压力的增加，煤样的弹性能和耗散能都随之减小，表明了瓦斯压力的升高减弱了煤样的冲击倾向性。

In order to study an occurrence mechanism of the complex dynamic disaster from the gas content seam of the deep mine, an analysis was conducted from the view of the coal-rock mechanics property, acoustic emission features and energy dissipation. The uniaxial compression test system of the gas content coal compositation with the RMT-150C mode rock mechanics test machine and in combination with the DS5 mode full information acoustic emission signal analyzer were applied to study the evolution laws of the coal sample mechanics index and acoustic emission index under different gas pressure. The study results showed that the gas pressure was increased from 0 MPa to 2 MPa, the compressive strength of the coal sample was decreased by 31%, the elastic modulus were decreased with 32.1% and the Poisson’s ratio was increased by 46.9%. The dynamic failure time, elastic energy index and bump energy index of the coal sample would be decreased with the gas pressure increased. The bump potential of the coal sample would be changed from the strong bump potential to the weak bump potential. The accumulated numbers and accumulated energy of the coal acoustic emission signals were individually reduced by 55.1% and 58.3%. From the analysis on the energy consumption, with the gas pressure increased, the elastic energy and the consumption energy of the coal sample would be decreased and thus could show that the gas pressure increased could decline the bump tendency of the coal sample.