Study On The Apparent Parameters Inversion Of Electromagnetic Sounding Method In Pit (Well)-ground

Facing a number of mine development and utilization of crisis ,we need to raise High Power pit (well)-ground resistivity imaging technology and equipment parameters of the subject. Ideological objectives to achieve this is to use an effective way to mine or exploration area has been the tunnel, mine, drilling, and then put the electrical field source and measurement installations on the ground and underground in different locations, to form ground moving source launch, ground, underground (pits, wells) received of Quasi-three-dimensional technical devices. This combination of surface and ground observation methods can Stimulate abnormal body from different directions, access to a large number of conductive subsurface information,therefore, this approach may improve the detection depth and resolution, and reduce non-uniqueness of data interpretation. As a special observation mode, how to handle the data inversion was crucial.This paper mainly study on the apparent paramenters inversion of resistivity imaging technology in Pit(well)-Ground. Active source electromagnetic sounding data can make use of existing magnetotelluric inversion technology after field source correction. For the pit (well)-Ground special circumstances , Using the finite difference and integral equation method forward modeling Observation data. The paper compared the Reduced Basis OCCAM inversion method and non-linear conjugate gradient inversion method and its application,and analyzed the different inversion modes, different inversion parameters Application. For the simulation of ground and surface observation data, inversion using NLCG,Comparison of surface and ground observation data inversion, study the inversion results of surface and underground data inversion do with each other. The paper also discusses the impact of topographic and static displacement , and use with the terrain and a static displacement of inversion to achieve topographic correction and static shift correction.The research shows that observations way of Pit (well)-Ground resistivity imaging Technology,that the simultaneous observe on surface and underground,Inversion of the data obtained, can effectively improve the identification of the abnormal body. Select the appropriate inverse modes and parameters, it can improve the inversion results of the fitting degree. In the inversion with topography correction and static shift correction, can easily eliminate the topography and the impact of static displacement.