| 摘要 |
A bendable roof bolt is provided for use in a mine at locations where it is desired to utilize a roof bolt having an overall length greater than the available vertical working distance between a mine floor and mine roof. The bendable roof bolt is made from a rebar material and has a preselected length greater than the available vertical working distance between the mine floor and mine roof. The rebar has a uniform cross section over its entire length. Prior to inserting the bendable roof bolt in a bore hole drilled in the mine roof, the roof bolt is bent by suitable means at a predetermined location along the rebar preselected length to allow the end of the bendable roof bolt to be inserted in the bore hole. After the roof bolt is bent and the roof bolt end inserted in the bore hole, the roof bolt is rebent to partially straighten the roof bolt and allow the remainder of the roof bolt to be advanced in the bore hole.
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