矿井瞬变电磁法在老窑采空区边界探测中的应用  

Application of Mine TEM in Old Workings Gob Area Boundary Prospecting

作　　者：韦乖强 赵慧 Wei Guaiqiang;Zhao Hui(The Fifth Exploration Team,Shandong Bureau of Coal Geology,Jinan,Shandong 250100;Shandong Institute of Geological Sciences,Jinan,Shandong 250013)

机构地区：[1]山东省煤田地质局第五勘探队,济南250100 [2]山东省地质科学研究院,济南250013

出　　处：《中国煤炭地质》2021年第5期72-75,共4页Coal Geology of China

摘　　要：资源整合矿井因开采时间较长,废弃老窑及采空区多,存在老窑采空区资料不祥、采空区边界不清、积水情况不明等问题,严重威胁整合矿井采掘安全。贵州水城某资源整合矿井1202工作面,在其回风巷左侧位置存在采空区。为查明采空区的边界位置及富水性,采用瞬变电磁法在迎头左侧沿上倾30°平面及垂直平面分别设计了7个、9个不同探测角度。对比分析上倾30°平面和垂直方向视电阻率剖面图,两个方向探测的低阻异常位置非常吻合,据此推断拟采掘设计巷道约63m处为老窑采空区边界,且采空区富含水。Because of long-term exploitation,thus a lot of abandoned old workings and gob areas have been left behind.Issues of less old workings gob data,confused gob area boundary and ponding situation have seriously threatened mining safety.A gob area has been found in the working face No.1202 outtake left upper wall of a resources integration mine in the Shuicheng,Guizhou.To identify gob area boundary and water yield property,through TEM has designed 7 and 9 prospecting lines with different angles along front left updip 30°plane and vertical plane respectively.Comparatively analyzed resistivity sections of the two planes have found that the low-resistivity anomaly positions of the two are quite consistent.On this basis,intended driving designed roadway 63m ahead is the boundary of old workings gob area,and the gob area is rich in water.

关 键 词：资源整合矿井 矿井瞬变电磁法 老窑采空区 视电阻率 

分 类 号：P631.3[天文地球—地质矿产勘探]