【摘要】 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。更多还原

【Abstract】 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.更多还原