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修筑防洪沟位于山麓或山前平原地区的金属矿和煤矿,在其矿区范围内,多无大的地表水系成为矿井充水的主要水源。山地矿井的大气降水常常以山洪或潜流的形式泄入矿区补给含水层,或者从开采造成的陷落区或裂隙进入矿井。如果井口位置选择不当,位于最高洪水位以下,则有山洪直接灌入井口
Construction of flood control ditch located in the foothills or piedmont plain metal mines and coal mines, in the mining area, the more non-major surface water system to become the main source of water for the mine. Atmospheric precipitation in mountain mines often escapes into the recharge aquifer in the form of flash floods or undercurrent, or into the mine from subsided areas or fractures caused by mining. If the location of the wellhead is improperly selected and is below the highest flood level, flash floods directly into the wellhead