为了研究煤矿地下煤系地层与含水层之间的水力联系,以甘肃庆阳宁正矿区为例,根据主采煤层底板平均埋深在700~1000m之间、顶板洛河组地层为主要的含水层、地质构造发育程度中等的条件,在分析研究煤矿地质及物性特征的基础上,选用等值反磁通瞬变电磁勘探法替代常规瞬变电磁法,根据电性值差异推断出断裂或地质体边界构造,判断其相互间的水力联系,最终圈定煤系地层与洛河组含水层之间的含(导)水通道,并通过钻孔验证其有效性。

In order to clarify the hydraulic connection between the underground coal seam stratum and the aquifer of the coal mine, Ningzheng mining area in Qingyang, Gansu province is taken as an example, the average buried depth of the floor of the main coal seam is between 700 and 1000 m, the roof Luohe Formation is the main aquifer, and the development degree of geological structure is medium. On the basis of the analysis and study of coal mine geological and physical characteristics, anti magnetic flux transient electromagnetic exploration method is used instead of conventional transient electromagnetic method, to infer the fault or the geological boundary structure, judge the hydraulic connection between them, finally delineate between the coal strata and Luohe Aquifer containing (guide) water channel, and verify its effectiveness through drilling.