李瑾,李明培

• 1:中煤科工集团西安研究院有限公司
• 2:陕西投资集团创新技术研究院有限公司

摘要(Abstract)：

为研究陕北侏罗纪煤田榆神矿区凉水井煤矿基岩顶面古河道控水规律,从地质及水文地质条件分析,并结合采动覆岩破坏,研究了4~(-2)煤上覆岩层空间分布特征、导水裂隙带发育、基岩顶面古河道及其控水规律。结果表明,4~(-2)煤为典型浅埋薄基岩煤层,基岩和沙层东薄西厚,土层基本全区分布,局部有条带状缺失。根据基岩顶面形态、土层缺失区,研究圈定了基岩顶面古河道,划分为有沙层充填的古河道和无沙层充填的古河道;工作面跨古河道开采"前-中-后",涌水量表现出"稳定-突增-稳定"的规律,有沙层充填的古河道区涌水量增大幅度明显高于无沙层充填的古河道区。古河道控水规律研究为榆神矿区浅埋薄基岩煤层开采矿井涌水危险性评价提供一种新思路,可为古河道发育区矿井防治水工作提供一定地质依据。

关键词(KeyWords)： 古河道;控水规律;导水裂隙带;凉水井煤矿

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李瑾,李明培

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