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。 Based on the calculation of the top plate periodic pressure, the step-breaking pitch is obtained. According to the calculation results, the corresponding safety measures are taken. The influence of the pre-concentrated stress on the coal pillar stability is analyzed. Based on the analysis of the safety factor, a reasonable arrangement scheme of the hydraulic support is obtained. Through the careful analysis of the risk factors of roof accidents, the corresponding solutions are summarized.