综采放顶煤采煤法煤层顶板稳定性分析

Analysis on Stability of Coal Seam Roof with Fully Mechanized Caving Mining Method

基于对顶板周期来压的计算,得出周期断裂的步距。根据计算结果,采取相应的安全措施;分析超前集中应力对煤柱稳定性的影响,再根据分析得出的安全系数的大小,得出合理的液压支架的布置方案。通过对冒顶事故的危险因素进行细致的分析,逐一归纳出相应的解决方法。

Through the roof cycle pressure calculations, the step of cycle fracture is obtained. According to the results, the appropriate safety measures are adopted. The influence of ahead concentration stress on coal pillars stability is analyzed. According to analysis on the safety factor value, a reasonable arrangement program of hydraulic supports is obtained. Through detailed analysis on the risk factors of roof fall accidents, the corresponding solutions are obtained.