摘要
为解决银星一号煤矿14采区18_(下)煤工作面采掘活动面临的宝塔山弱胶结砂岩水害问题,综合采用室内试验、井下放水试验和理论计算的方法,研究宝塔山砂岩弱胶结特征,查明含水层水文地质特征,评价含水层疏降的可行性。结果表明:宝塔山弱胶结砂岩多为泥质胶结,孔隙性较好;矿物成分主要为石英、长石、黏土矿物、白云母、方解石和其他矿物;可以承受较大的抗压强度,但抗剪强度较小;渗透系数随着粒径增大而增大,且具有较好的给水度、容水度和持水度;通过放水试验获取的宝塔山砂岩含水层渗透系数和钻孔单位涌水量与以往相比差异不大,影响半径较大;通过井下放水试验得出的疏降可行性判别标准为405 m/(m^(3)·min),说明宝塔山砂岩含水层水可疏性较好。
In order to solve the water damage problem of weakly cemented Baotashan Sandstone faced by the mining and excavation activities of the 18_(lower) coal working face in the 14th mining area of Yinxing No.1 Coal Mine,by comprehensively adopting the methods of indoor tests,downhole water release tests and theoretical calculations,the weak cementation characteristics of Baotashan Sandstone are studied,the hydrogeological characteristics of the aquifers are identified,and the dewatering feasibility of aquifers is evaluated.The results indicate that the weakly cemented sandstones in Baotashan are mostly argillaceous cementation with relatively good porosity;The main mineral components are quartz,feldspar,clay minerals,muscovite,calcite,and other minerals;Can withstand relatively large compressive strength but relatively small shear strength;The permeability coefficient increases with the increase of particle size and has relatively good water supply degree,water capacity degree,and water retention degree;The permeability coefficient and borehole unit water inflow of Baotashan Sandstone aquifers obtained through water release tests are not significantly different from before,and the impact radius is relatively large;The feasibility discrimination criterion for dewatering obtained through downhole water release tests is 405 m/(m^(3)·min),indicating that the water in Baotashan Sandstone aquifers has relatively good dewatering properties.
作者
王宸
李彦俊
田宽
Wang Chen;Li Yanjun;Tian Kuan(Ningxia Yinxing Coal Industry Co.,Ltd.,Yinchuan 750000,China)
出处
《山东煤炭科技》
2025年第6期147-152,共6页
Shandong Coal Science and Technology
基金
国家自然科学基金面上项目(52274243)。
关键词
银星一号
弱胶结
宝塔山砂岩
水文地质特征
放水试验
Yinxing No.1 Coal Mine
weak cementation
Baotashan Sandstone
hydrogeological characteristics
water release test
