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神东矿区西部井田含煤地层延安组普遍为下白垩统志丹群所覆盖,人们还未充分认识志丹群在矿区中的水文地质意义和矿井充水特征.文章以神东矿区寸草塔矿为例,研究了志丹群地下水富存规律、补径排特点、突水特征和保水开采条件.研究表明寸草塔矿志丹群平均厚度58.4m,弱~中等富水,大气降水补给为主,径流与排泄受地形地貌控制,井田存在潜在志丹群突水危险;加强志丹群地下水赋存规律探查,充分利用下伏于志丹群的、平均厚度70.7 m的中侏罗统直罗组隔水屏障,是寸草塔矿实现志丹群保水开采的重要前提.
The Yan’an Formation in the coal field in the west coalfield of Shendong Mining Area is generally covered by the Lower Cretaceous Zhidan Group, and the hydrogeological significance and mine water filling characteristics of the Zhidan Group in the mining area have not yet been fully recognized. The study shows that the Zhudan group has the characteristics of richness of groundwater, the characteristics of the padding, the features of water inrush and the condition of water retention and mining.The study shows that the average thickness of the Zhidan group is 58.4m in Wechatan Mining Group, with a weak to moderate water content and an atmospheric precipitation recharge The runoff and excretion are controlled by topography. There is a danger of potential Zhidan Group inrush in the mine field. The investigation of groundwater occurrence in Zhidan Group is strengthened to make full use of the Middle Jurassic Zhiluo group water barrier, inch straw tower mining Zhidan important premise.