巷道诱发型冲击地压的发生机制及危险性分析

为了治理巷道诱发型冲击地压发生的灾害，从力学机制方面阐述了巷道诱发型冲击地压发生的静-动应力主导关系，揭示了巷道诱发型冲击地压发生的机制；将煤层巷道的围岩二次静应力和震源产生的动应力叠加，得到了巷道围岩二次应力与不同应力波叠加后的最大主应力和最小主应力表达式。从高应力差和巷道围岩冲击倾向性两方面考虑，提出了巷道诱发型冲击地压发生的判断方法；直接判断出巷道在特定深度、震源在某个位置、产生一定的应力波时，巷道发生冲击地压及冲击范围，并解释了巷道群附近产生大范围冲击的机制，成功分析了山东某煤矿掘进工作面发生冲击的原因。研究结果为分析诱发型冲击地压的危险性提供了理论基础，为治理诱发型冲击地压提供了技术途径。

Study of occurrence mechanism and risk analysis of induced rockburst in roadway

In order to govern the disasters produced by induced rockburst in roadway, the dominate relationship between static stress and dynamic stress of induced rockburst in roadway is expounded based on the mechanical mechanism. The mechanism of Induced rockburst occurred in roadway is revealed; and the expressions of maximum principal stress and minimum principal stress superimposed by quadratic stress field of surrounding rock and different kinds of stress waves occurred in coal roadways are obtained by superimposing the quadratic stress field of surrounding rock and the dynamic stress produced by hypocenter. Given the two aspects of high stress difference and bump-prone of roadway surrounding rock, a judgment method of induced rockburst occurred in roadway is put forward. As a result, the rockburst and burst range can be judged out directly when occurring in specific depth of the roadway, the hypocenter locating in certain place and generating a certain amount of stress wave. The mechanism of wide-ranging burst produced nearby the roadway group is explained; and the reason why the heading face in a coal mine in Shandong province occurred rockburst is analyzed successfully. The research results provide a theoretical basis for analyzing the risk of induced rock-burst, and a technical way to governance induced rock-burst.