Process for positioning strengthening rods in mine levels and public works
AssigneesS.A.E.I. Celite, Societe d'Etude et de Construction de Machines pour Toutes Industries SECOMA
InventorsAlain Benichou, Raymond J. Perraud
Life of this patent
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Abstract
Strengthening rods are positioned in mine levels and public works by introducing into a long bore made in a wall or other surface to be strengthened, a thermosetting resinous composition and a metal rod of substantially the same length as the bore, and rotating the rod at a rotation speed which causes it to heat up by friction with the composition to the hardening temperature of the composition so as to cause the rod to be sealed in the bore by the hardening of the composition.
Claims13
A process for positioning a strengthening rod in mine levels and public works and the like, which process comprises
- storing a previously mixed thermosetting resinous composition which includes a resin, an inhibitor, a catalyst and an abrasive filler in an amount sufficient to cause generation of substantial heat upon rotation of a metal rod at about 800 rpm in contact therewith, said composition not being hardenable at room temperature;
- introducing into a long bore made in a wall or other surface to be strengthened, said previously mixed thermosetting resinous composition not hardenable at room temperature, and an unpreheated metal rod of substantially the same length as said bore;
- and
- rotating said rod at a rotation speed of at least 800 rpm and sufficiently great to cause it and said composition to heat up by friction between the rotating rod and the composition, particularly said abrasive filler, to the hardening temperature of said composition so as to initiate hardening of said thermosetting resinous composition and cause said rod to be sealed in said bore by the hardening of said thermosetting resinous composition as a result of heat generated substantially solely by rotation of said unpreheated rod.
Dependencies are inferred from the claim text.