深凹露天矿边坡地下承压水泄压技术  

Pressure relief technology of underground confined water in slope of deep sunken open-pit mine

作　　者：李惠发 冯萍[1] LI Huifa;FENG Ping(West Open-pit Mine,Fushun Mining Group Co.,Ltd.,Fushun 113001,China)

机构地区：[1]抚顺矿业集团有限责任公司西露天矿,辽宁抚顺113001

出　　处：《露天采矿技术》2022年第4期74-77,共4页Opencast Mining Technology

基　　金：抚顺英才计划资助项目(FSYC202107008)。

摘　　要：露天采矿随着逐步的开采降深,边坡逐渐加高加陡,高应力累积及诱发的岩体损伤机理愈加复杂,形成深凹露天矿;受地区降水量及部分岩层遇水软化等特征的影响,极易导致高陡边坡内地下承压水富集,诱发滑坡安全隐患,对安全生产存在潜在威胁。针对这一现象,通过抽水试验和计算机模拟计算,确定承压水赋存岩层地质状态和边坡潜在失稳滑动面,根据岩层特性进行深凹露天矿边坡地下承压水泄压技术研究。结果显示,通过水平疏干孔穿透1层或多层含水岩层底板进行疏干的技术方法可将不同含水层中的地下承压水释放出来,显著效果。With the gradual mining depth reduction,the slope gradually increases in height and steepness,and the mechanism of high stress accumulation and induced rock damage becomes more complex,forming a deep concave open-pit mine.Under the influence of regional precipitation and softening of some rock strata in water,it is easy to lead to enrichment of lower confined water in high and steep slopes,which leads to landslide safety hazards and potential threats to production safety.In view of this phenomenon,through pumping test and computer simulation calculation,the article determines geological state of confined water strata and the potential instability sliding surface of slope.According to the characteristics of rock strata,we study the pressure relief technology of underground confined water in the slope of deep concave open-pit mine.The results show that the technical method of dredging through horizontal dredging holes through the floor of one or more layers of water-bearing strata can release the underground confined water in different aquifers,which has significant effect.

关 键 词：地下承压水 滑坡 边坡稳定 疏干排水 承压孔 

分 类 号：TD745[矿业工程—矿井通风与安全]