呼和乌素矿地处乌兰木伦河和呼和乌素沟交汇处，该流域上部煤层存在露天开采回填区和井工开采老空区，含水层、回填富水区以及采空积水区与河流水力联系复杂，对下部煤层开采产生较大影响。为查明含水层、回填区以及采空区富水情况及水力联系，充分综合利用钻探精准获取局部水文地质参数、化探分析水源及水力联系、物探规模化快捷探测等技术优势，进行了有针对性的点(钻探)-线(化探)-面(物探)一体化水文地质勘查技术研究。不仅查明了研究区目标含水层富水性特征，更精细甄别出河流与目标含水层之间的水力联系，并对研究区进行了涌水量分区预测。研究结果表明：通过钻探及抽水试验发现目标含水层单位涌水量呈指数数量级变化，近乌兰木伦河露采回填区的钻孔单位涌水量远大于井采区；经过水化学特征分析发现乌兰木伦河和呼和乌素沟水质类型明显不同，乌兰木伦河附近钻孔水样属于第四系冲积层水，呼和乌素沟附近钻孔水样属于砂岩含水层水，露采回填区积水与乌兰木伦河流存在明显的补给关系；瞬变电磁法探测结果显示井采区内从西往东远离河流区域视电阻率值逐步增大，且整体阻值比露采区域要高，说明井采采空区富水性较弱(或不含水)，受河流影响较小，露采回填区域从西向东在靠近河流交汇区域，视电阻率值整体降低，低阻异常强度、范围均较大，说明露采回填区域富水性强或较强，受河流补给较明显。此外，根据瞬变电磁法和抽水试验结果初步尝试建立了视电阻率与单位涌水量之间的函数关系式，并绘制区域单点单位涌水量平面图，为区域水文地质参数的获取提供依据，降低勘查成本。

The Huhewusu Mine is located at the intersection of Ulan Moron River and Huhewusu Ditch. There are open-pit mining backfill areas and underground mining old goafs in the upper coal seams of the basin. Aquifers, backfilled water-rich areas, and water-collected areas have complex hydraulic links with rivers, which have a greater impact on lower coal seam mining. In order to find out the aquifer, backfill area, and goaf area rich in water and hydraulic connections, it made full use of the technical advantages of drilling to accurately obtain local hydrogeological parameters, geochemical analysis of water sources and hydraulic connections, and large-scale and fast detection of geophysical prospecting totarget point (drilling)-line (chemical prospecting)-surface (physical prospecting) integrated hydrogeological investigation.Not only the water-rich characteristics of the target aquifer in the study area were ascertained, the hydraulic connection between the river and the target aquifer was more finely screened out, and the water inflow area prediction was carried out in the study area.The results show that the unit water inflow of the target aquifer has changed by experimental orders of magnitude, and the unit water inflow of the boreholes near the Ulan Moron River open-pit backfill area was much larger than that in the underground mining area through drilling and pumping tests;It was found that the water quality types of the Ulan Moron River and Huhewusu ditch were obviously different after analyzing the hydrochemical characteristics. The borehole water samples near the Ulan Moron River belonged to the Quaternary alluvial water, and the borehole water samples near the Huhewusu Ditch belonged to sandstone aquifer water. There was an obvious replenishment relationship between the accumulated water in the open-pit backfill area and the Ulan Moron River;The results of transient electromagnetic detection showed that the apparent resistivity value gradually increased in the underground mining area from west to east far away from the river, and the overall resistance value was higher than that of the open-pit mining area, indicating that the water content of the underground mining goaf was weak (or not water content), and less affected by the river. The apparent resistivity value was reduced overall in the open-pit mining backfill area which was close to the river confluence from west to east, the abnormal intensity and range of low resistance were relatively large, indicating that the open-pit mining backfill area had strong or strong water richness and more obvious replenishment by the river.In addition, based on the transient electromagnetic method and pumping test results, a preliminary attempt was made to establish the functional relationship between apparent resistivity and unit water inflow, and to draw a regional single-point unit water inflow plan to provide a basis for obtaining regional hydrogeological parameters and reduce exploration costs.