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甘肃酒钢集团镜铁山黑沟矿2#溜井设计井筒直径5.5m,深度498m,目前实际井筒深度474m(海拔+3874～+3400m),属于国内少有的高海拔、高深度溜井之一。自2007年9月25日至2009年1月8日,2#溜井曾先后在井深180～240m之间堵塞达七次之多,不仅对生产影响极大,同时也给矿山的安全生产构成严重威胁。为了保证生产顺畅,适度消除安全隐患,减少溜井井筒堵塞几率,对2#溜井井筒刷大至直径7.0m。为保证施工人员自身作业安全,刷大后的井筒井壁进
The 2 # chute of Jingtishan Heigou Mine in Gansu Jiugang Group is designed to have a wellbore diameter of 5.5m and a depth of 498m. At present, the actual wellbore depth is 474m (+3874 to +3400m above sea level) and belongs to one of the rare high-altitude and high-level slipways in China. From September 25, 2007 to January 8, 2009, No. 2 chute has successively blocked up to seven times between 180 and 240 m of well depth, which not only has a great impact on the production but also poses a serious safety risk to the mines Threats. In order to ensure smooth production, moderately eliminate potential safety hazards and reduce the probability of blockage of the slippery shaft, the shaft of the 2 # slippery shaft has a diameter of 7.0m. In order to ensure the safety of construction workers themselves, brush the shaft wall after the well into the well