Research On The Detection Capability Of The Three-dimensional Pattern Of Mine DC Resistivity Method

It is of great practical significance to detect the abnormal structure inside the coal mining face and the top and bottom plates,especially the water-bearing and waterconducting structures,which is the most important task in the prevention and control of mine water disasters.In recent years,the mine DC resistivity method has achieved obvious geological effects in detecting the thickness of the aquifer,the fracture zone,the water-bearing structure and the water-conducting structure of the roof and floor of the roadway,but the interior of the coal mining face and its top The detection of potential water and water-conducting structures in the surrounding rock of the floor is still a problem.In view of this,this paper proposes a three-dimensional pattern detection technology for mine DC resistivity method in which a power supply electrode is arranged on the top plate(floor)of a roadway to establish a stable artificial current field and a measuring electrode is arranged on the bottom plate(top plate)of another roadway.Firstly,based on the traditional electrical device type,12 kinds of mine DC resistivity method are proposed.Based on COMSOL simulation software,the electric field distribution characteristics of different device forms are studied.According to the simulation results,it is proposed.A form of device that can be used for actual detection.Then,based on the potential difference of the potential difference,the response of different device forms to the anomalous bodies in the surrounding coal face and the surrounding rock of the top and bottom plates is compared.The superior detection position of different device forms is analyzed,which is the working face of the coal mining face.The specific geological problems provide a theoretical basis for the selection of the corresponding device form.Finally,different sizes of anomalous bodies are set in the coal seam.Through the forward modeling,the resolving power of different device forms on the anomalous bodies is studied.According to the simulation results,the minimum exploration volume of different device forms is pointed out,and the DC resistance of the mine is theoretically explained.The method of detecting the abnormal structure of the inside of the coal mining face and the top and bottom plates by the method of the threedimensional cloth.