Study on the application of passive seismic interferometric imaging technology in the detection of goaf in coalfield
Seismic interference method can extract effective information from background or environmental noise and be applied to subsurface geological structure imaging.The scope of goaf can be located by interferometric imaging of passive source seismic signals generated in coalfield.Based on the principle of passive source interference imaging,this paper adopts passive source seismic interference method to study the source location.Through the passive source interference imaging test of different interface numerical models,the accuracy of the method is verified.In addition,the results show that the lateral resolution of passive source interference imaging is higher than the longitudinal resolution.Different migration velocities have a great influence on the longitudinal position,but have little influence on the lateral position.Finally,it is applied to the location of goaf in actual coalfield,and the imaging results are consistent with the actual situation,which verifies the effectiveness of passive source seismic interference imaging method in this paper and its practicability in the detection application of goaf in actual coalfield.
万方数据
维普
