Research on seismic response characteristics of geological anomaly bodies in floor limestone of Group A Coal
Safe and efficient mining of Group A Coal in Huainan mining area is an important prerequisite to ensure energy supply in East China.Accurate understanding of the structural form and development of underground coal seams is a necessary condition for safe pro-duction and accident reduction.This article took the No.1613 A working face of Zhangji Coal Mine as the engineering background and used passive imaging and noise imaging techniques to analyze the microseismic monitoring data of the roof and floor of the working face.There are many microseismic events near the fault fracture zone that has been grouted and treated in the working face,with the deepest reaching about 80 m below the working face,effectively verifying the existence of the fault fracture zone.Analyze the waveform signal re-ceived in the detector through inversion method to obtain information about the wave velocity field near the working surface.Using the 3D migration data volume of the West Ⅱ and West Ⅲ1 coal mining areas,various attributes were calculated and the seismic response characteristics and attribute characteristics of the revealed geological anomaly bodies were studied.It was found that the study of the structure and geological anomaly bodies in this area requires special attention to the indicative role of five attributes:ant body,maximum curvature,minimum curvature,local anomaly,and drop.Research showed that based on the 3D migration data volume,all extracted at-tributes were displayed on large faults and can be effectively interpreted.The attributes that display better for faults with smaller drops were ant body attributes and maximum curvature,minimum curvature,local anomalies,and drop attributes.
Group A Coalgeological anomaly bodiesmicroseismic monitoring3 D seismic attributeresponse characteristics
万方数据
维普
