Closed shaft i.e. mine shaft, securing method, involves diagonally boring set of holes in vertical projection, and attaching and loading carrier, core rods and cement suspension or concrete into holes

摘要

The method involves diagonally boring a set of holes (6) in a vertical projection. A carrier (11), core rods (7) and a cement suspension or concrete are attached and loaded into the holes for forming a mine shaft (2). The carrier extends from the shaft, and a fixed rock (4) surrounds the shaft. The cement suspension or concrete is pressed into the holes at high pressure, and injected into bulk goods (1) and the fixed rock. Another set of holes are bored, and the core rods are inserted into the latter set of holes.