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高山矿务局为完成马格涅特矿下部水平矿体的采准工程,需要将开凿于f=11～13的岩石中的现有箕斗罐笼井延深160米。考虑到在这个水平早先从现有箕斗井掘进的一条水平巷道,设计要求从这条巷道往450米水平掘进超前天井,然后再用凿岩爆破法从下部出碴刷大天井进行竖井延深。作者建议用苏联建国60周年雅西诺瓦特斯克机械制造厂成批生产的2KB型天井钻机,钻凿直径为1.5米的超前天井。但是,这种钻机只能钻进100米深的天井。因此,这条天井必须分两次钻进,即从450米水平钻到530米水平,
In order to complete the quarrying of the lower level ore body at the Magninet mine, the Alpine Mining Bureau needed to extend the existing skilift cage in the rocks f = 11-13 to a depth of 160 meters. Considering the horizontal tunnel previously drilled from the existing skip well at this level, the design requires tunneling 450 meters from this tunnel to advance the advanced well, and then blasting the large shaft from the lower section with the rock-blasting method for shaft delamination . The authors suggest drilling a 2-kilometer-long wellhead drilled in batches at the Iasino-novaksk factory for the 60th anniversary of the founding of the Soviet Union, drilling an advanced 1.5-meter diameter patio. However, this rig can only drill into a 100-meter-deep patio. Therefore, this patio must be drilled twice, from 450 meters to 530 meters horizontal level,