浅部矿井静载荷主导型冲击地压监测方法与实践

发布时间：2018-12-16 03:20

【摘要】：针对浅埋强冲击危险区静载荷高度集中、无顶板活动就面临冲击危险的特征,以古山煤矿为例,确定其冲击地压发生类型为集中静载荷主导型,对集中静载荷采用地震CT技术、数值模拟、现场实测等方法开展了分步评价,分步驱散,联合检验。结果表明:浅埋厚硬单层岩浆岩顶板提供集中静载荷,本次冲击地压无动载荷参与,冲击地压监测应以监控静载荷为主;据采前地震CT探测结果揭示冲击发生后,仍然存在静载荷高度集中区域;开采过程中静载荷实时监测与数值模拟揭示的强冲击危险区相吻合,微震、地音监测技术提供的动载荷信息检验了静载荷监测结果,表明工作面推进中顶板未垮断,高集中静载荷导致底板、煤层破裂。
[Abstract]:In view of the characteristics that the static load is highly concentrated in shallow buried strong impact danger area and there is no roof movement facing impact hazard, taking Gushan coal mine as an example, the occurrence type of impact ground pressure is determined to be concentrated static load leading type, and seismic CT technique is used for concentrated static load. Numerical simulation, field measurement and other methods are carried out step by step evaluation, step by step dispersal and joint inspection. The results show that the shallow buried thick hard monolayer magmatic roof provides concentrated static load, and there is no dynamic load in the impact ground pressure, and monitoring static load should be the main monitoring method for the impact ground pressure monitoring. According to the pre-mining seismic CT survey results, there is still a high concentration area of static load after the impact occurred. The real time monitoring of static load in mining process coincides with the strong impact risk area revealed by numerical simulation. The dynamic load information provided by micro-earthquake and ground-sound monitoring technology has verified the results of static load monitoring, which indicates that the roof in the working face has not broken down. High concentrated static load leads to floor and coal seam rupture.
【作者单位】：煤炭科学研究总院开采设计研究分院;天地科技股份有限公司开采设计事业部;
【基金】：国家自然科学基金煤炭联合基金资助项目(U1261211) 天地科技开采生产力转化基金资助项目(KJ-2015-TDKC-05)
【分类号】：TD324

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