覆岩结构下含水层开采疏放水效果评价研究  

Evaluation study on water drainage effect of aquifer mining under overburden structure

作　　者：吕兆海 潘长斌 杨皓博 高雅 林金川 靳华 李德彬 Lv Zhaohai;Pan Changbin;Yang Haobo;Gao Ya;Lin Jinchuan;Jin Hua;Li Debin(Ningxia Coal Industry Co., Ltd., China Energy Investment Corporation, Yinchuan, Ningxia 750011, China;Xiaozhuang Mining Co., Ltd., Shaanxi Binchang Mining Group Co., Ltd., Binzhou, Shaanxi 713500, China;Northwest Mine Hydrogeology Research Institute, Wuhai, Inner Mongolia 016000, China)

机构地区：[1]国家能源集团宁夏煤业有限责任公司,宁夏回族自治区银川市750011 [2]陕西彬长小庄矿业有限公司,陕西省彬州市713500 [3]西北矿井水文地质研究院,内蒙古自治区乌海市016000

出　　处：《中国煤炭》2020年第8期79-84,共6页China Coal

摘　　要：针对覆岩结构下煤层开采顶板水量变化情况,利用数值模拟方法对上覆含水层进行了有效探查和疏放研究。结果表明:覆岩组合特性控制着含水层释放过程,通过优化疏放水钻孔设计提高疏放水效果,实现工作面回采过程中矿井涌水量“削峰平谷”,以达到经济合理的目的,垂直或平行于地层走向并朝向地层标高降低方向的钻孔疏放水效果最佳。选择从钻孔疏放水原始数据、总量变化、钻场水量变化、疏放水量与水压相关性等方面的评价途径,对上覆含水层疏放效果进行分析研判,判断工作面受水害威胁程度降低至安全阈值范围,具备安全开采条件,为后续工作面顶板疏放水方案制定及效果评价提供参考。In view of the roof water change in coal mining under overburden structure,the effective exploration and drainage of overlying aquifer were studied by using numerical simulation method.The results showed that the combination characteristics of overburden controlled the release process of aquifer.The drainage effect could be improved by optimizing the design of drainage boreholes,realizing the smooth change of the mine water inflow in the mining process of working face,so as to achieve the economy and rationality.The best drainage effect of boreholes perpendicular to or parallel to the stratum strike and toward the direction of lowering the formation elevation was the best.The drainage effect of overlying aquifer was analyzed and judged from the aspects of original data,total amount change of borehole drainage,drilling field water quantity change,correlation between drainage water quantity and water pressure,etc.,and the threat degree of water disaster on working face was reduced to the safety threshold range and the working face had the conditions for safe mining,the results provided reference for the subsequent roof drainage scheme formulation and effect evaluation.

关 键 词：上覆含水层 数值模拟 覆岩组合特征 安全阈值 效果评价 

分 类 号：TD745.2[矿业工程—矿井通风与安全]