评估岩体应力状态防治冲击地压

Prediction and control of rock burst by evaluating rock mass stress

基于地质动力区划方法,确定区域内的活动断裂,划分岩体断块结构,结合原地应力测量和数值计算方法来评估区域岩体的原岩应力,从而确定研究区域的冲击危险区;然后通过次生应力测量及数值模拟等手段,确定采场及巷道周围次生应力的分布情况。根据对研究区域冲击发生的条件的研究,确定可能发生冲击的采掘布置方式及地点,从而为有针对性地采取防治措施提供依据。

Based on the geo-dynamic division method, firstly, regional active faults are found out, and tectonic structures of rock mass are divided. Then combined in-situ stress measurement and numerical calculation, regional rock mass stress-state is evaluated. The danger zones of occurring rock burst are determined. The distribution of induced stress around coalface and tunnels is researched by the measurement of induced stress and numeric value simulation. According to the conditions of occurring rock burst, we can determine the disposition manners of excavating and tunneling and places in which rock burst may occur. It can provide the basis for setting down corresponding precautions against rock burst.