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我矿提升井保护岩柱的掘除是该竖井延深关键工程,由于采取了保险盘、反井掘进和导爆管非电起爆系统等技术措施,加快了工程进度,保证了安全施工。一、工程概况这个竖井井筒净直径5.0米,毛直径5.8米;净断面19.64米~2,毛断面26.42米~2。一期工程该竖井于一九七○年掘砌到-214.37米,并交付使用。二期工程于一九八○年七月末延深至-460.49米。井筒延深长度为246.12米。
Excavation of mine pillar to protect rock pillar is a key project of deep shaft dewatering in this mine. Due to the adoption of technical measures such as fuse plate, anti-well excavation and non-detonating system for detonating pipe, the progress of the project is accelerated and the safe construction is ensured. First, the project profile The shaft of the shaft diameter of 5.0 meters in net, 5.8 meters gross diameter; net section of 19.64 m ~ 2, 26.42 m ~ 2 gross section. In the first phase, the shaft was built up to -214.37 meters in 1970 and delivered for use. The second phase of project was extended to -460.49 meters at the end of July 1980. Wellbore extension length of 246.12 meters.