青龙寺井田水文地质特征分析

青龙寺井田位于陕北侏罗纪煤田神府矿区新民开采区中部，地质构造简单，主要可采煤层为延安组3^-1和5^-2煤层。井田主要含水层为第四系冲积层孔隙潜水、侏罗系延安组裂隙承压水和烧变岩空洞裂隙潜水。含水层主要接受大气降雨的入渗补给，补给量较小，因而富水性较弱。分析认为：未来矿井开采时的主要充水通道为煤层采空区顶板冒落形成的导水裂隙带，充水强度与大气降雨关系密切，在暴雨或持续降雨、渗透条件较好时，充水量大，其余时段和层段的充水量较小；开采5^-2煤层时对顶板砂岩水应以疏放为主。

Hydrogeological Characteristic Analysis in Qinglongsi Minefield

The Qinglongsi minefield is situated in the middle part of Xinmin mine district, Shenmu-Fugu mining area of northern Shaanxi Jurassic coalfield. It is simple geological structured with main mineable coal seams of Nos.3-1 and 5-2. Main aquifers in the minefield have Quaternary alluvium pore-space phreatic water, Jurassic Yanan Formation fissure confined water and burnt rock cavity fissure phreatic water. Aquifers are mainly recharged by small amount of infiltrated atmospheric precipitation, thus weaker water yield property. Analysis considered that： in future coal mining, the main water filling channel is water conducted fissure zone caused by coal roof caving, water filling intensity has close relation with atmospheric precipitation, large water filling amount during torrential and durative rain with good filtration conditions, on the contrary, smaller water filling amount. To the roof sandstone water, main measure should be adopted is drainage during the mining of No.5-2 coal seam.