Research And Application Of Reflected In-seam Wave Exploration Method

3D seismic exploration has poor accuracy,low resolution and difficult imaging for the geological structures’s height which is close to coal thickness,it is difficult to meet the geological needs of efficient mining,Radio electromagnetic wave penetration technology is greatly affected by the interference of the actual environment.How to improve the detection accuracy of hidden geological structure of coal seam has become an urgent technical problem to be solved.This paper reviews the relevant literature of underground seismic exploration technology in coal mines domestic and abroad in recent years,and comprehensively discusses and analyzes the current situation of seismic exploration technology in coal mines currently.Taking a domestic coal mine face as the research object,this paper focuses on the complex geological conditions in the study area are analyzed emphatically,and uses the reflected in-seam wave exploration technology to achieve the purpose of detecting concealed geological structure in coal seam accurately.Firstly,we collected the lithological characteristics of coal seam,roof and floor in the study area,the measured profile of coal seam roadway and other geological data,studied the excitation conditions of slot wave in coal seam,selected a appropriate excitation conditions of in-seam waves,used a suitable observation system,and processed the reflected-wave data.The techniques of band-pass filtering,energy compensation,deconvolution and velocity scanning analysis are mainly used to accurately return the reflected-wave,finally,infered and interpreted the results which refered to the available geological material.to compare the inversion interpretation results with the results which is exposured in coal mining,t is proved that reflected in-seam wave has high precision and high availability in detecting concealed geological structure in coal seam.