The Application Of High-Densityresistivity Method In Detection Of Underground Disaster Source

Serious geological disasters are caused by all kinds of underground disaster sources,such as underground gob, old kilns, geological fault, collapse column, formation fissures,aquifers and water-filled region, coalbed gas etc. These disasters seriously affect theecological environment, economic and social harmonious development.In addressing the problem of underground geology, the high-density resistivitymethod is widely used for its convenience and information richness. If we effectively usehigh-density resistivity method to detect and propose appropriate preventive measuresbefore underground disasters hit, it could greatly reduce the damage and bring favourablesocial benefit.The east slope of Guyang Shibao Mining in Inner Mongolia has rich undergroundwater and part of it has penetrated the pit affecting the effect of blast. It not only leads toincreased mine production costs, but also influences the stability of the latter part of theslope which could easily become landslide. For a detailed investigation of the groundwatersituation in the east slope, we use high-density resistivity method to prospect and analyze.Two kinds of devices, differential measurement and wenner measurement are used in dataacquisition, five lines are laid gradually according to the need and finally300physicalpoints are obtained. In data interpretation, the author compared the results of differentialand wenner and created3D registration of various types of data. Finally, on the basis ofregular work, the author used Kriging3D interpolation technique for horizontal sliceextraction and analyzed the level geoelectric changes.Through the comprehensive comparative analysis, the author confirmed thedistribution of groundwater near the northeast corner of mine, identify the type ofgroundwater which is mainly of Quaternary regolith pore water. There are two mainwater-rich region in the study area: in the west side of the study area, the groundwater oftailing mining penetrates west along the bedrock; in the east side, the groundwaterpenetrates along the F18fault zone. The author also indentify the structural configuration and distribution of water channel in the fault fracture zone of detection area.During the study, the author used the method constructed from two-dimensional planeto three-dimensional space while analyzing the data of high-density resistivity method. Inother words, the author first analyzes the main line, combines with other line to make aoverall judgment, and then uses3D interpolation method for further research. Especiallythe use of3D interpolation method for slice extraction could make the electrical situationof studied area more intuitive. Sometimes it could even make up for the deficiencies oflines survey to avoid returning to field measurements and save a lot of time, human andmaterial resources. High-density electrical prospection and appropriate combination ofinterpolation method could achieve better results and play a positive role. It could obtainrich and high precision information from low cost, what’s more, the interpretation of theresults is more vivid and clear.