在多煤层开采矿区，上部煤层开采后形成采空区积水。在近距离煤层开采时，上部采空积水区易对下部煤层开采形成威胁。某资源整合矿井3号煤层已开采，而9号煤层存在小煤窑，开采范围不清。为保证9号与15号煤安全掘进，结合某矿的水文地质概况和开采条件，在15号煤运输巷向9号煤暗斜井方向布置15°、45°和60°三个探测角度对揭煤区域采用矿井瞬变电磁法进行探测。勘探发现，三个探测方向上均出现较大范围低阻异常区，尤其在45°和60°探测方向上异常较为突出，且在60°探测方向上9号煤暗斜井穿过异常区，由此推断9号煤暗斜井见煤点附近存在大范围采空区且富水性较强。根据探测确定的积水异常区域，布置了探放水钻孔进行提前疏放水，累计放水13.2万m3。%In multi-seam coal mining areas, after the mining of upper coal seams, can often form gob area ponding. If the interval is too close, the ponding will threaten the mining of lower coal seams. The coal No.3 of a resource integration mine has been mined out, while the coal No.9 has existed small private coalmines with ill-defined mining extent. To ensure safe driving in coal No.9 and coal No.15, ac⁃cording to the mine’s hydrogeological general situation and mining condition, have laid out 15 °, 45 ° and 60 ° three prospecting direc⁃tion TEM lines for coal uncovering area from coal No.15 gangway toward coal No.9 inclined winze. The prospecting has found that all three directions existed rather large low-resistivity anomalies, especially 45 ° and 60 ° directions more outstanding. Furthermore, on 60 ° direction the coal No.9 inclined winze is cut through the abnormal area. Thereafter, coal intersecting point near the coal No.9 in⁃clined winze has large extent gob area with stronger water yield property. Based on prospecting determined ponding anomalous area, laid out exploration and drainage boreholes for advanced drainage, the accumulative drained water is 132 thousand m3.
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