Detection and inversion of diggings water-bearing structure by using electrical imaging
The water-riched overburden of a seabed mine poses threat to safe exploitation.The level-135 m strike drift of the Xinli mine district of Sanshandao gold mine in Shandong province was selected to be the survey site for electrical imaging, in order to map the groundwater distribution of the overlying rock under the level-135 m Four methods, which are;Wenner, Dipole-Dipole,Schlumberger and P-S were used at the selected drift,respectively.The apparent resistivity and inversion results obtained from using the Wenner, Dpole-Dpole and Schlumberger array, gave consistent information about the subsurface medium, which is that three different resistive layers exists beneath the-135 m level.The first rock mass which is highly resistive has an average thickness of 30 m and is located directly under the level-135 m, This indicates that little or no water exists in the rock mass between the levels of-135 m and-165 m since most of it have been discharged into-165 m drift.The rock mass ranging from 30 m to 60 m in depth under the-135 m level has low resistivity and fracture water.The polarizability of the P-S method relates to metal sulfide.P-S inversion results show two local anomalies that occurred at 370 m and 440 m along the survey line at shallow depth between 10 m and 15 m, which may be caused by rock mineralization.The obtained results show a good resemblance with the results obtained from hydrogeological surveys and hydrological structure analyses and that the gallery electrical imaging was able to map the water-bearing structures.
detection inversion electrical imainging waterbearing
Fengshan Ma Qingyun Di Kepeng Li Shanfei Wang Wei Li
Key Laboratory of Shale Gas and Geoengineering Institute of Geology and Geophysics,CAS Beijing, Chin Shandong Gold Mining Company Limited,Laizhou,Shandong, China
国际会议
北京
英文
56-58
2016-06-27（万方平台首次上网日期，不代表论文的发表时间）