苏联矿业地质力学研究所研制成一种新型地下导航仪,它解决了矿业勘察工作中最难以解决的问题,采用它就可避免在隧道挖掘工作中产生偏差。它可以确保借助复式炸药进行水平隧道或倾斜隧道挖掘工作的绝对精确度。当借助机械化的回采机构来开掘矿石或煤时,它也可用来控制矿内巷道的支撑,轨 The Soviet Union Institute of Mining Geomechanics developed into a new type of underground navigation system, it solves the mining survey of the most difficult to solve the problem, using it to avoid the work of the tunnel excavation deviation. It ensures absolute accuracy with horizontal explosives for horizontal or inclined tunnel excavation work. It can also be used to control the support of mine roadways when digging ore or coal with a mechanized recovery mechanism. Rails