摘要
为防止新桥硫铁矿东翼井下开采过程中出现岩溶水害事故,以及降落漏斗范围内产生的地表塌陷地质灾害,在露天转地下开采期间,对新桥矿东翼露天边坡外侧实施垂直封底帷幕注浆工程,为后续东翼井下安全开采提供保障。基于地面岩溶水文地质调查结果,揭示了矿区地下岩溶发育分布特征,从各次序钻孔单位注浆量、压水试验、帷幕外侧观测孔地下水位变化等多个方面,对帷幕的注浆止水效果进行了综合评价。结果表明:帷幕外侧观测孔地下水位普遍上升,阻水效果明显,帷幕内涌水量明显减小,表明帷幕对岩溶通道进行了有效封堵,止水效果显著。帷幕建成后,不仅有效保障了矿山开采的安全,节省了巨额的排水费用,还防范了矿区岩溶塌陷地质灾害现象。研究成果可为类似矿山帷幕防治水工程效果评价提供技术参考。
To prevent rockfall water disasters and surface subsidence geological hazards caused by underground mining in the east wing of the Xinqiao Sulfur-Iron Mine during the process of open-pit to underground mining,a vertical sealing curtain grouting project is implemented on the outer side of the east wing open-pit slope.This provided guarantees for the subsequent safe underground mining in the east wing.Based on the results of ground karst hydrogeological investigation,the distribution characteristics of karst development in the underground of the mining area were revealed.The grouting effect of the curtain is comprehensively evaluated from multiple aspects such as the grouting volume of each sequence of boreholes,water pressure tests,and changes in groundwater levels of observation holes outside the curtain.The results showed that the groundwater levels of the observation holes outside the curtain generally rose,the water-blocking effect was obvious,the water inflow in the curtain decreased significantly,indicating that the curtain effectively blocked the karst channels,and the water-blocking effect was remarkable.After the curtain was completed,it not only effectively ensured the safety of mining in the mine,saved a huge amount of drainage costs,but also prevented the occurrence of karst subsidence geological disasters in the mining area.The research results can provide technical references for the evaluation of water prevention and control curtain engineering effects in similar mines.
作者
陈彬
王义霞
左孔辉
CHEN Bin;WANG Yixia;ZUO Konghui(Tongling Chemical Industry Group Co.,Ltd.;TCIGCL Xinqiao Mining Co.,Ltd.;321 Geological Team,Anhui Bureau of Geology and Mineral Resources)
出处
《现代矿业》
2026年第2期213-218,共6页
Modern Mining
关键词
注浆帷幕
矿山防治水
岩溶发育
grouting curtain
groundwater flow control in mines
karst development
