Risk evaluation and early warning for rock burst based on microseismic activity index of geological layers
The early warning and evaluation of rock burst risks are important prerequisites for the safe production of rock burst mines.Taking 307 working face of Shaanxi Changwu Tingnan Coal Industry Co.,Ltd.as the research object,the technical means of microseismic monitoring and mine pressure monitoring were used to study the characteristics of microseismic activity index in different geological layers.Through fine analysis of microseismic events in different geological layers of overlying rock strata,the variation characteristics and laws of microseismic activity index in each layer of the rock strata during fully mechanized caving face passing through the square influencing zone in thick coal seam were revealed,and a differentiated evaluation method for rock burst risks for different layer based on microseismic activity index was proposed,and comprehensive early warning index for rock burst based on high-level microseismic activity was established.The feasibility of this comprehensive index for coal mine rock burst risk's early warning was proved by on-site application.
geological layersrock burstrock burst risk evaluationmicroseismic monitoringmicroseismic activity index
万方数据
维普
