RESEARCH ON RELATIONSHIP BETWEEN ELECTRICAL RESISTANCE TOMOGRAPHY AND THE MULTIPLE-SCALE SIZE AND DEPTH OF ROCK FRACTURE

摘要

Multiple sets of cracks exist in the fault fracture zone,damage zone and even intact rock mass,resulting in poor conductivity and high permeability of the hard rock fissure seepage channels.Therefore,there is high likelihood for groundwater migration channels in the future,thus underground engineering is facing huge challenges.To more accurately grasp the characteristics of the permeability of rock mass and fracture,it is extremely important to get hold of the phenomena of internal structure model,genetic mechanism and dynamics principle in the multiple-scale size and depth of rock fracture.Accurate analysis of the multiple-scale of rock mass fracture,mastering the principles and patterns of the solute and flow medium migration rule in pore and fracture can provide scientific basis for underground construction engineering.In this paper,the multiple-scale size and depth of rock fracture were investigated using ERT in the physical model tests,forward and inversion software simulation and site detection.The results show that small scale crack has a good physical effect with ERT.Combined with the ERT measurement results of water conducted zone in the typical research area,rock fracture with many lines are arranged in parallel and the vertical direction of the fault,which are in conformity with the physical model tests.The results provide great progress in the precise exploration of geophysical detecting on the multiple-scale size and depth of rock fracture.