坚硬顶板条件掘进期间多因素诱发冲击地压分析

Rockburst Induced by Multiple Factors During Driving Period with Harden Roof

以02回风巷掘进期间发生的冲击地压为例,分析了影响冲击地压的地质因素、开采技术因素,综合类比02工作面开采过程微震监测结果,确定了坚硬顶板条件掘进期间多因素诱发冲击地压的过程。研究表明,煤岩物理力学性质、开采深度、坚硬厚层岩层结构和地质构造使掘进巷道具备冲击地压发生的条件;对冲击地压认识不足,产生了采掘相互扰动、掘进速度过快以及无顶板控制措施、大面积悬顶以及产生的高能量微震事件等多因素叠加作用,从而促使煤体高应力集中,这是掘进巷道冲击地压显现的主要原因。

It taking rock burst appeared during driving period of 02 air-return roadway as example, the factors that influenced rockburst were analyzed, which included geological factors, mining factors and so on, and with micro-seismic monitoring results of 02mining working face during mining process, then the process of rock burst induced by multiple factors during driving period underharden roof were determined. The research showed that coal and rock mechanics properties, mining depth, harden strata structures andgeological structures were the condition that induced rock burst during roadway driving, many factors interacted as inadequate know ofrock burst, which include mining exploitation, driving speed high, without roof controlling measures, large area suspend roof andhigh energy micro-seismic incident and so on, and high stress concentration of coal mass was the main reason that induced rock burstduring roadway driving period.