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Method and apparatus for strengthening of the rock of a rock formation, in particular in mountain factory pits of the underground construction
Method and apparatus for strengthening of the rock of a rock formation, in particular in mountain factory pits of the underground construction
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机译：加强岩石地层的岩石的方法和设备，特别是在地下建筑的山区工厂坑中
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摘要
The stabilisation of weak rock formations, such as longwall coal faces in underground mines, is effected by inserting into a borehole drilled in the rock formation a reinforcing assembly in which a plurality of longitudinally extending annular segments are fixedly disposed in longitudinally staggered relationship about a coaxially arranged inner tube, feeding through the inner tube a bonding composition so as to cause it to flow back from the closed end of the borehole to the annular space at the mouth of the borehole, and allowing the bonding composition to harden so as to bond the reinforcing assembly to the rock formation.
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