Application Of Transient Electromagnetic Method In Detecting Hidden Disaster Factors Of Coal Mine Flood Under The Condition Of Undulating Terrain

For a long time,coal mine water disaster has brought heavy economic losses and casualties to the country and people,which seriously threatens the safety of coal mine production.Preventing water inrush accidents has become an urgent hydrogeological problem to be solved.Due to the complex terrain,serious cutting and common scarps in Yunnan coal mining area,the conventional DC method can not meet the detection requirements;in addition,the surface elevation difference is large,the vegetation is dense,and the transient electromagnetic method of loop device wiring and measurement construction is difficult,and the work efficiency is low.In view of the above reasons,it is of great practical significance to select the overlapped loop device with strong mobility,high construction efficiency,strong signal,low field labor intensity and strong resolution of geoelectric cross section to study the application of transient electromagnetic method in detecting hidden disaster causing factors of coal mine flood under the condition of undulating terrain.In this study,Zhujiawan coal mine with large topographic relief is selected for exploration research.The cuqtem-8 transient electromagnetic instrument of Wuhan University of Geosciences is selected after the test.Through the inversion interpretation of Wuhan geo large transient electromagnetic method processing program FDA vc2.50,it is verified that the transient electromagnetic method can accurately detect the plane and spatial distribution of hidden disaster causing factors of coal mine flood under the condition of undulating terrain.Through the inversion of the measured data of Zhujiawan coal mine hidden disaster causing factors detection project,the distribution of abnormal areas in the detection area is found out,and good detection effect is achieved.It shows that the transient electromagnetic method has certain advantages in detecting hidden disaster factors of coal mine flood under the condition of undulating terrain,and has a very good application scenario,which is worthy of promotion.