Detection and monitoring of water-filled voids using transient electromagnetic method:a case study in Shanxi,China
作者单位：Key Laboratory of Mineral ResourcesInstitute of Geology and GeophysicsChinese Academy of Sciences State Key Laboratory of Coal Resources & Safe MiningChina University of Mining & Technology(Beijing)
会议名称：《中国科学院地质与地球物理研究所2013年度（第13届）学术年会》
会议日期：2014年
学科分类：081801[工学-矿产普查与勘探] 081901[工学-采矿工程] 081802[工学-地球探测与信息技术] 0819[工学-矿业工程] 08[工学] 0818[工学-地质资源与地质工程]
基 金：supported by the National Natural Science Foundation of China(project No 41174090 41174108 and 41130419)
关 键 词：Transient electromagnetic method Mined-out void Building stability Monitoring
摘 要：Shanxi Province is a major coal base for the rapid development in China,but heavy production of coal resources has left abundant water-filled voids,creating significant geologic hazards around coal *** is necessary to quickly investigate the position and distribution of voids with effective geophysical *** feasibility of transient electromagnetic(TEM)method in detecting and monitoring water-filled voids is analyzed using 3D finite-element numerical simulation results as well as a case study in this *** case study was mainly to analyze and monitor the conditions around the site of a power transfer station under construction in the west of Shanxi province where many water-filled,minedout voids ***-loop TEM sounding was carried out three times from January 2010 to April 2011 around the building *** low resistivity abnormal area had been repeatedly located and the survey results showed that the area of voids increased with time,which indicated that the ground at the site was in an unstable and dangerous *** surveys provided more detailed geological information to the government for further safety arrangement and building re-design.