| 摘要 |
An insertion tool for inserting a multi-strand twisted cable into a blind mine tunnel roof bore hole includes a drive mechanism on one end thereof for fitting into a conventional bolting machine, and a socket on the opposite end thereof for receiving therein the bare end of a multi-strand twisted cable. The insertion tool socket is formed in the reverse pattern of the circumferential configuration of a conventional seven-strand twisted steel cable, having six essentially semi-cylindrical elongate and parallel arcuate channels formed therein in a spiral identical to that of the outside surfaces of respective cable strands of the twisted cable. The insertion tool is used by inserting, with a slight twisting action in the direction of the cable strand spiral, the bare end of the multi-strand steel twisted cable into the insertion tool socket mechanism. The opposite end of the insertion tool is then fitted into a conventional bolting machine boom arm for driving the multi-strand cable, via the insertion tool, into the bore hole in the mine tunnel roof in a manner similar to that in which the bolting machine would insert a conventional headed mine roof anchor bolt or multi-strand cable.
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