某尾矿库排洪隧洞及竖井跑浑的治理方法  

Mudflow Treatment Method for Flood Discharge Tunnel and Shaft of a Tailings Reservoir

作　　者：周瑜 ZHOU Yu(Sichuan Academy of Safety Science and Technology)

机构地区：[1]四川省安全科学技术研究院,四川省成都市610000

出　　处：《现代矿业》2023年第2期244-246,共3页Modern Mining

摘　　要：某山谷型尾矿库排洪系统采用溢洪塔-竖井-排洪隧洞的排洪方式,在运行过程中排洪支洞及竖井出现喷水跑浑现象。经现场勘查,结合尾矿库工程地质条件和建设情况分析,总结出跑浑原因是隧洞围岩较破碎、裂隙发育,衬砌壁后未进行回填灌浆存在空鼓,从而使库底经岩体裂隙与隧洞衬砌壁后空隙形成贯通通道。通过采取紧急停排,并在溢洪塔周边抛洒山皮土覆盖堵漏进行应急处置,然后对排洪隧洞及竖井壁后进行灌浆回填。经过应急处置和永久治理后,该尾矿库排洪系统跑浑现象消失,排尾恢复正常。The flood discharge system of a valley tailings reservoir adopts the flood discharge method of spillway tower-shaft-flood discharge tunnel.During the operation,the flood discharge branch tunnel and shaft appear water spray and mudflow phenomenon.Through field investigation,combined with the analysis of engineering geological conditions and construction of tailings reservoir,it is concluded that the reason of mudflow is that the surrounding rock of tunnel is broken and the fissures are developed,and there is a hollowing out after the lining wall is not backfilled and grouted,so that the bottom of the reservoir is connected with the gap behind the tunnel lining wall through the rock mass fissures.The emergency treatment is carried out by taking emergency stop and discharge,and throwing mountain soil covering and plugging around the spillway tower,and then grouting backfill is carried out behind the flood discharge tunnel and shaft wall.After emergency disposal and permanent treatment,the mudflow phenomenon of the tailings pond flood discharge system disappeared and the tail discharge returned to normal.

关 键 词：尾矿库 排洪隧洞 跑浑 灌浆回填 

分 类 号：TD926.4[矿业工程—选矿]