钱营孜煤矿新副井筒地面预注浆工艺设计与施工应用  

Design and application of ground pregrouting technology for new auxiliary shaft in Qianyingzi Coal Mine

作　　者：郁志利 孙忠远 YU zhili;SUN zhongyuan(Qianyingzi Coal Mine,Wanbei Coal Power Group Co.,LTD.,Suzhou234000,China)

机构地区：[1]皖北煤电集团有限责任公司规划发展部,安徽宿州234000

出　　处：《煤矿现代化》2024年第1期93-97,共5页Coal Mine Modernization

摘　　要：为实现井筒安全快速掘砌,采用“上冻下注”方法施工,提出了井筒地面预注浆采用“内圈直孔+外圈S孔+分支孔”的施工方案。先直孔段地面预注浆结束后,而后井盘空间留给冻结及井筒掘砌施工,以期对富水基岩裂隙含水层进行注浆封堵,最终在井筒周边形成不透水的注浆帷幕。结果表明全井筒剩余涌水量5.443 m^(3)/h,满足设计要求注浆后井筒剩余涌水量≤6 m^(3)/h的条件,确保井筒快速施工及安全性。In order to realize the safe and fast digging of the wellbore,the construction method of"freezing up and injecting down"is adopted,and the construction plan of"inner circle straight hole+outer circle S hole+branch hole"is proposed in this paper for the pregrouting of the wellbore surface.After the ground pre-grouting of the straight hole section,the well pan space is left for freezing and wellbore boring construction,with a view to grouting and sealing the water-rich bedrock fracture aquifer and finally forming an impermeable grouting curtain around the wellbore.The results show that the whole wellbore remaining surge water 5.443m^(3)/h,to meet the design requirements after grouting wellbore remaining surge water≤6m^(3)/h conditions to ensure rapid construction and safety of the wellbore.

关 键 词：地面预注浆 立井井筒 施工工艺 直孔+S孔 

分 类 号：TD745[矿业工程—矿井通风与安全]