ROOF SUPPORT SYSTEM FOR A MINE AND THE METHOD AND TOOLING FOR PROVIDING THE SAME

摘要

AN IMPROVED ROOF SUPPORT SYSTEM FOR A MINE AND A METHOD AND TOOLING FOR PROVIDING THE SAME An improved roof support system for a mine or the like is of the type which includes a pair of plates secured to the roof of the mine at opposite sides thereof adjacent opposing ribs of the mine and a horizontal, transverse reinforcing member extending between the pair of plates. The improvement includes the reinforcing member having a first rod with a first end thereof secured to a first of the plates and a second end extending toward the second plate. The second plate includes a vertical portion with a transversely extending opening therethrough. The reinforcing member also includes a second rod in the form of a bolt which has a bolt head located against the vertical portion of the second plate with the threaded second end thereof extending through the opening toward the first plate. The second end of the first rod includes a sleeve mounted thereon having a threaded bore therethrough for receipt of the threaded end of the bolt. The bolt and the first rod are coupled together by insertion of the threaded end of the bolt into the threaded bore to form the reinforcing member. The reinforcing member is capable of producing tension between the first and second plate which tension may be varied by rotation of the bolt head of the bolt relative to the first rod. The invention also includes the method of supporting the roof of a mine and a tool for providing the same.