Research And Application Of The Comprehensive Geophysical Prospecting Technology In Mine Laneway Prediction

Karst,faults,fracture zones on the safety of underground mining brings significant safety risks,especially in the process of tunneling in areas containing limestone,mining headers often encounter such as faults,karst and other undesirable geological bodies,if the fault crosses the water-bearing zone is very easy to become a water channel,karst is often water inrush,mud water inrush and other accidents,especially with the increase in mining depth destroyed the original.The balance of ground stress is disrupted,especially with the increase of mining depth.On the other hand,there is a relative lack of geological information in the deep area,so if we do not know the geological situation of the boring head,once we encounter the bad geological body,accidents will easily occur,which will not only affect the normal mining,but even cause economic losses and casualties,so it is necessary to carry out the research of physical detection.In this paper,a comprehensive overdetection study based on transient electromagnetism theory,ground penetrating radar and seismic reflection method is carried out for the differences of geophysical properties of caves,faults and surrounding rocks.The geophysical parameters of the study area were used to establish the corresponding geological models,the response characteristics of different geoelectric models were simulated by COMSOL multiphysics software,the propagation law of seismic waves was simulated by Tesseral 2D software,and the arrangement of seismic observation system was also simulated,and the water fractionation characteristics of faults and caves were simulated by GPRSIM software.In addition,the arrangement of the seismic observation system was simulated.The forward modeling is the prerequisite of inversion,and the work plan suitable for the study area can be proposed by means of numerical simulation to improve the detection efficiency;the forward simulation of the inversion results can verify the inversion results.Finally,a comprehensive overdetection field experiment was conducted in the study area,and the results of multiple physical sounding methods were inversion and comprehensive analysis,based on seismic,transient electromagnetism and ground penetrating radar integrated overdetection can improve the credibility of inversion results.