瞬变电磁法超前探技术在老巷勘探中应用分析OA

DC electrical method,audio-frequency electrical penetration method and other geophysical exploration techniques have been widely used in the field of coal mine geological exploration.However,under complex geological conditions,problems such as insufficient accuracy in resistivity identification of hidden structures like old tunnels and low efficiency in locating anomalous bodies have not been effectively solved,posing major hidden dangers to water prevention and control in working faces.With its high sensitivity to low-resistivity bodies,low cost and high efficiency,the Transient Electromagnetic Method(TEM)has become the most suitable method for advanced detection.In this study,Transient Electromagnetic Method was used to the exploration of old tunnels in the working face to explore the geological structures in front of 15307 working face and delineate the water rich area.During research process,relying on the low resistance sensitivity characteristics of TEM,the data processing and analysis method under complex condition were optimized,the resistivity response characteristics of old tunnels under different working condition was accurately judged,abnormal bodies were efficiently and accurately identified,and the comprehensive analysis of high resistance and low resistance areas was completed.The results show that TEM can accurately identify the distribution of old tunnels,geological structures and water-rich conditions ahead of working face,provide reliable technical support for water prevention and control in working faces,and has good applicability and superiority in old tunnel exploration,which can offer scientific guidance and reference for geological survey and water prevention and control in similar working faces.