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瞬变电磁法(TEM)广泛的应用于煤矿富水区勘探.本文基于富水地层的电阻率相对不含水地层呈现低阻的地球物理前提,利用定源回线瞬变电磁法对鄂尔多斯盆地某煤矿进行富水区勘探.分别抽取了底板平面、地板平面上延50米和下延50米的视电阻率平面等值线图,进行断面图和平面图的共同解释,依据电阻率的高低分析富水异常区的分布规律.推测工区底板上覆地层的富水区面积小于下伏地层的富水区面积,富水区的走向大致呈南西、北南方向,随着层位深度的加大,富水区的连通性变好.推测勘探区的西北部有大片的富水区,在勘探区的西南部存在两处较小的富水区域.
Transient electromagnetic method (TEM) is widely used in the exploration of coal-rich water area.Based on the geophysical premise of resistivity of water-rich strata relative to non-water-bearing strata, Coal mine for exploration in the water-rich area.The contour maps of apparent resistivity of the floor plan, the floor plan and the floor plan of 50 m and 50 m respectively were extracted, and the cross-sectional and plan views were jointly interpreted. According to the analysis of the resistivity It is inferred that the area of water-rich area in the overburden in the work floor is less than the area of water-rich area in the underlying stratum, and the trend of water-rich area is roughly in the southwest and north-south directions. As the depth of the stratum increases, The connectivity of the water-rich area is better, suggesting that there are large areas of water rich in the northwestern part of the exploration area and two smaller water-rich areas in the southwestern part of the exploration area.