Micro Seismic Response Characteristics Research Of Coal Fracture

Coal or rock dynamic disasters bring a great threat to the mine's safety,However,the methods widely used in contact prediction have obvious limitation.Micro-seismic monitoring methods can remote,dynamic,real-time to monitor coal or rock dynamic disasters,This method is constantly sum up and working in progress,on coal fracture some theoretical and practical aspects to be studied and solved.This paper analyzes and summarizes the impact of coal fracture and the monitoring methods,and for the present lack of traditional monitoring methods,the paper proposes the methods using micro-seismic characteristic parameters combine spectrum analysis.Through the uniaxial compression test,using three different models of the sensor,according to the actual conditions,seting reasonable collection parameters to ensure that the true effectiveness of the signal.Through analysis of test results that the deformation process of coal is closely related with cracks within the original compaction,the generation of new cracks,expansion, and the evolution process of linking,the micro-seismic parameters can better reflect the deformation of coal destruction and damage evolution characteristics.Collected by micro-seismic signal of spectrum analysis,fingding micro-seismic signal spectrum is not static but rather changes with the load and deformation process.This is very great significance for using micro-seismic techniques to forecast coal fracture.Finally,combined with the geology of Lu Xi coal mine,the paper carried on micro-seismic observation setting on spot.It was of better effect and feasibility that micro-seismic events was analyzed and located through the practice monitoring data.