深部高应力异常集中区冲击矿压动态防治实践

针对采动煤岩体的应力和储能的“时-空”演化特征，以徐州三河尖煤矿深部高应力异常集中的9202工作面及其轨道巷为试验区，提出了冲击矿压的动态防治技术体系：① 分析冲击危险的地质和开采因素，特别是垂直应力梯度的分布规律，进行冲击矿压危险的“时-空”预区划；② 针对不同的冲击危险区，制订相应的煤岩体强度弱化参数；③ 利用微震、电磁辐射以及钻屑法等多参量监测手段及时检验卸压治理的效果，如果检测指标超标，则继续进行卸压解危，直至指标明显突降。防治过程始终遵循“危险监测-卸压解危-效果检验”的动态循环。这一技术目前已在我国多个高冲击危险工作面进行推广应用。

Practice of rockburst dynamic prevention in deep high stress concentration district

The “time space” evolution of stress and energy accumulated in the mining coal and rock materials is dynamic，taking the deep high stress concentration 9202 working face and its headentry as test zone，the rockburst dynamic prevention technology was put foreword，which was followed that:① Analysis on the geological and mining factors of rockburst danger，particularly the distribution law of vertical stress gradient，and the “time space” distribution of rockburst danger was pre zoned；② According to the different dangerous district，the appropriate design and parameters of coal and rock strength weakening was developed；③ Using the multi parameter monitoring methods such as microseism(MS)，electromagnetic emission(EME) and drilling bits，the effect of rockburst prevention was checked.If the test indexes exceeded the critical value，the relieve shots was continued until the indexes monitored obviously dropped.Rockburst prevention process always followed the dynamic cycle of danger monitoring relief prevention effects check.Now，the technology was popularized and applied in many high rockburst dangerous districts in China.