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

YANG Xing; GENG Hui

doi:10.19896/j.cnki.mtkj.2024.05.020

Abstract：In order to improve the accuracy of monitoring and early warning for rock burst,based on multi-source monitoring data collect-ed 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.Re-search 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 inver-sion,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.