工作面区域应力判定及冲击地压多源监测预警研究

Research on stress determination and multi-source monitoring and early warning of rock burst in working face

为了进一步提高冲击地压监测预警的准确性,基于微震监测、声发射、电磁辐射等采集到的恒大煤矿1366工作面多源监测数据,进行工作面精准震源定位、区域应力判定和冲击地压多源监测预警。研究确定冲击地压监测预警多源敏感指标,确定应力集中区域,判断冲击地压危险等级,并提出合理有效的卸压措施。研究表明:①根据多源监测信息对工作面大能量微震事件的响应结果,确定了微震频次、能量等微震敏感指标;②基于震动波CT反演,确定了不同区域的应力分布情况,明确了应力集中区域;③根据不同指标响应的情况判断了冲击地压危险性等级,可以对冲击地压危险性进行迅速准确的判断;④根据微震频次、能量和应力分布情况,准确判断了工作面危险区域,提出了合理有效的卸压措施,防止冲击地压灾害的发生。通过对恒大煤矿1366工作面冲击地压微震、声电等多源监测信息的深度分析,提高了冲击地压监测预警的准确度和效率,保证了煤矿作业的安全。

In order to improve the accuracy of monitoring and early warning for rock burst,based on multi-source monitoring data collected from microseismic monitoring,acoustic emission,electromagnetic radiation,etc.,in the No.1366 working face of Hengda Coal Mine,the accurate source positioning,regional stress assessment and multi-source monitoring and early warning of rock burst in the working face were carried out.The research determined multiple sensitive indicators for monitoring and early warning of rock burst,determined stress concentration areas,determined the danger level of rock burst,and proposed reasonable and effective pressure relief measures.Research showed that based on the response results of multi-source monitoring information to high-energy microseismic events in working face,microseismic sensitivity indicators were determined,such as microseismic frequency,energy,etc.;based on seismic wave CT inversion,the stress distribution in different regions was determined,and the stress concentration area was clarified;the danger level of rock burst was determined based on the response of different indicators,which can quickly and accurately determine the danger of rock burst;based on the frequency,energy,and stress distribution of microseisms,the dangerous area of the working face was accurately identified,and reasonable and effective pressure relief measures were proposed to prevent and control the occurrence of rock burst.Through in-depth analysis of multi-source monitoring information such as microseismic,acoustic,and electrical impacts on the No.1366 working face of Hengda Coal Mine,the accuracy and efficiency of monitoring and early warning for impacts were improved,ensuring the safety of coal mining operations.