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为研究疏水降压孔长时间疏排水作用对碳酸盐岩含水层的影响,以太原古交矿区马兰煤矿主斜井奥陶系碳酸盐岩含水层为研究对象,对比分析主斜井底2次施工疏水孔揭露含水层水文地质情况。结果表明,疏水孔附近地下水水力交换加快,使碳酸盐岩溶解速度增加,地下水沿钻孔周边裂隙、节理发育带不断侵蚀溶解,形成蓄水空间,造成含水层位抬升,局部水位较原来有所升高。疏水孔裸孔段的水位抬升,使原来相对弱含水地层富水性质发生变化。
In order to study the effect of drainage and drainage on the aquifer of carbonate rock aquifers for a long time, aiming at the Ordovician carbonate aquifer of the main inclined shaft of Malan Coal Mine in Gujiao Mining Area, Taiyuan, China, Construction of hydrophobic holes to expose aquifer hydrogeology. The results show that the hydraulic exchange of groundwater near the hydrophobic hole is accelerated, the dissolution rate of carbonate rock is increased, underground water fissures around the borehole, and the zone of jointing and development continuously dissolves and dissolves to form a water storage space, causing the aquifer level to rise. Increased. Water holes in the open hole in the hydrophobic hole are uplifted, so that the water-rich nature of the original relatively weak aquifer is changed.