井下瞬变电磁法在煤矿陷落柱探测中应用 .pdfVIP

学兔兔 第22卷9期 中 国 煤 炭 地 质 Vol-22 No．9 2010年9月 C0AL GEOLOGY OF CHINA Sep． 2010 doi：10．3969~．issn．1674-1803．2010．09．17 文章编号：1674—1803(2010)09—0072—04 井下瞬变电磁法在煤矿陷落柱探测中应用 刘向红 ．刘盛东 (1．宿州学院地球与工程学院，安徽 宿州 234000； 2．中国矿业大学深部岩土力学与地下工程国家重点实验室．江苏徐州 221116) 摘 要：潘三矿12318面在回采过程中发现一陷落柱，为查明其分布范围、赋水、导水情况，采用井下瞬变电磁法进行 探测。基于矿井内切眼、风巷、机巷的位置，采用U型观测系统布设了三条测线。将不同方向视电阻率断面图进行对 比，解释该陷落柱距风巷的垂赢距离在70m左右。依据视电阻率断面图高阻值在面内延伸的形态，确定了该陷落柱 的长轴方向及分布范围，并断定其无富水异常。经钻孔验证，与解释结果一致，表明瞬变电磁法应用于井下进行陷落 柱探测具有较高的准确性。 关键词：瞬变电磁法；陷落柱；U型观测系统；视电阻率断面图；潘三矿 中图分类号：P631_3 文献标识码：A Application of Underground TEM in Coalmine Subsided Column Detection Liu Xianghong ，Liu Shengdong。 f1．College of Geosciences and Engineering，Suzhou University，Suzhou，Anhui 234000；2．State Key Laboratory of Geomechanics and Deep Underground Engineering，CUMT，Xuzhou，Jiangsu 22 1 1 1 6) Abstract：A subsided column has found during winning in the No．12318 production face in Panji No．3 coalmine．To identify its distribution range，water beating and water conducting properties，the TEM was used in detection．According to open—off cut，air entry and conveyor roadway positions in the eoalmine，using U typed observing system laid out 3 lines．Contrast of different direction apparent resistivity sections has interpreted vertical distance between subsided column and air entry is about 70m．Based on apparent resistivity section high resistance value extending configuration in the plane，has determined the subsided COIUnln major axis direction and distribution range，and also concluded that no wate