为了保证德盛煤业5号煤层的安全开采，通过分析德胜煤业5号煤层开采的地质和水文地质条件，认为5号煤层直接、间接含水层富水性弱，补给条件差，对矿井生产影响不大。通过在50206工作面进行顶板导水裂隙带发育高度研究，表明5号煤层开采后导水裂隙带发育高度已经超过其与2号煤层之间的间距，能够导通至第四系含水层，因此判断2号煤层开采后的采空区积水和地表大气降水均能够溃入井下，为矿井防治水工作的重点，必须加强对地裂缝的治理，减小大气降水和地表水顺导水裂隙带流入井下，保证矿井的安全生产。

 In order to ensure the safe mining of No.5 coal seam in Desheng Coal Industry, by analyzing the geological and hydrogeological conditions of No.5 coal seam mining in Desheng Coal Industry, it was considered that the direct and indirect aquifers of No.5 coal seam were weak in water abundance and poor in recharge conditions, which had little impact on mine production. Through the study on the development height of roof water conducting fracture zone in No.50206 Face, it was showed that the development height of water conducting fracture zone after No.5 coal seam mining had exceeded the distance between No.5 coal seam and No.2 coal seam, and could be connected to the quaternary aquifer. Therefore, it was determined that the goaf water and surface atmospheric precipitation after No.2 coal seam mining could burst into the underground, which was the key of mine water prevention and control work. It was necessary to strengthen the control of ground fissures, reduce the inflow of atmospheric precipitation and surface water along the water conducting fracture zone into the underground, and ensure the safe production of the mine.