高频大地电磁法在煤矿采空区勘探中的应用  

Application of High-Frequency Magnetotelluric Method in Exploration of Coal Mine Goaf

作　　者：唐春城 王中乐 

机构地区：[1]中南大学地球科学与信息物理学院,湖南 长沙

出　　处：《地球科学前沿（汉斯）》2023年第4期329-335,共7页Advances in Geosciences

摘　　要：为查明湖南株洲市某煤矿诱发水害事故的隐蔽致灾因素,采用高频大地电磁系统对测区进行了采空区探测。共布置了2.4 km总长的6条测线,设置了126个测点,采集了10~398 kHz的大地电磁信号,查明了测区范围内地下介质电阻率分布情况,并根据反演视电阻率剖面图推测出含水区域的空间位置。推测结果已知水体和已有地质资料相吻合,为测区的安全防范和治理提供了可靠的物探资料和强有力的依据。研究表明,高频大地电磁系统能在复杂地形条件下准确地定位煤矿采空区、确定采空区的边界和埋深,浅部勘探效果好,在煤矿采空区勘探领域的应用前景广阔。In order to identify the hidden disaster-causing factors of induced water hazards in a coal mine in Zhuzhou, Hunan Province, China, the high-frequency magnetotelluric system was used to explore the goaf area. A total of 6 measurement lines with a total length of 2.4 km were arranged, and 126 measurement points were set up to collect the ground electromagnetic signals ranging from 10 to 398 kHz. The distribution of underground medium resistivity in the measurement area was determined, and the spatial location of the water-containing area was inferred based on the inverted resistivity profile. The inferred results were consistent with the known water bodies and existing geological data, providing reliable geophysical data and strong evidence for the safety prevention and control of the measurement area. The study shows that the high-frequency magnetotelluric system can accurately locate the coal mine goaf, determine the boundary and burial depth of the goaf, and has good shallow exploration effect under complex terrain conditions. Therefore, it has broad application prospects in the exploration of coal mine goaf.

关 键 词：电磁法 高频大地电磁法 采空区 

分 类 号：TD7[矿业工程—矿井通风与安全]