石圪台煤矿第四系松散含水层保水采煤方案研究  

Research on water-preserved coal mining scheme for Quaternary loose aquifer in Shigetai Coal Mine

作　　者：张瑞昭 ZHANG Ruizhao(Shigetai Coal Mine,China Energy Shendong Coal Group Co.,Ltd.,Yulin,Shaanxi 719315,China)

机构地区：[1]国能神东煤炭集团有限责任公司石圪台煤矿,陕西省榆林市719315

出　　处：《中国煤炭》2023年第S02期215-225,共11页China Coal

摘　　要：通过分析石圪台煤矿水文地质特征、含隔水层分布特征及矿区充水因素,确定矿区北部富水区、柳条沟区域为保水目标层;利用经验公式对煤层导水裂缝带高度进行预测,分析了煤层上覆基岩、土层厚度、导水裂缝带高度与保护层厚度之间的关系,建立煤层采动水资源影响程度等值线图。结果表明:22^(上)、22、31号煤层开采均会对第四系松散含水层产生采动破坏,部分工作面采动裂隙将导通基岩,22^(上)煤层导通面积0.39 km^(2)、22号煤层导通面积4.72 km^(2)、31号煤层导通面积3.26 km^(2),导通区域涉及北部富水区和柳条沟区域。针对北部富水区和柳条沟区域不同煤层开采情况提出保水采煤分区方案及松散含水层破坏修复方案。By analyzing the hydrogeological characteristics,distribution characteristics of aquifers and water-resisting layers,and water filling factors in Shigetai Coal Mine,it was determined that the northern water rich area and Liutiaogou area in the mining area were the water-preserved target layer.Using empirical formulas to predict the height of coal seam water-flowing fractured zones,the relationships between the thickness of overlying bedrock and soil layer,height of water-flowing fractured zone,and thickness of protective layer were analyzed,and a contour map of the impact degree of coal seam mining on water resources was established.The results showed that the mining of upper No.22,No.22,and No.31 coal seams would cause mining damage to the Quaternary loose aquifer,and some mining fractures in the working face would lead to bedrock.The conductive area of the upper No.22,No.22,and No.31 coal seams was 0.39,4.72,and 3.26 km^(2),respectively,and the conductive area involved the northern water rich area and Liutiaogou area.In response to the different coal seam mining situations in the northern water rich area and Liutiaogou area,a zoning plan of water-preserved coal mining and a damage repair plan for loose aquifer were proposed.

关 键 词：松散含水层 保水目标 导水裂缝带 等值线图 保水采煤分区 

分 类 号：TD823.8[矿业工程—煤矿开采]