Resin anchored reinforced brittle structures

Abstract

Abstract Expansion shell rock bolts are more firmly anchored in rock drill holes by using an ambient-temperature-setting resin to flow around and anchor parts of the shell to each other and to the rock while protecting from moisture loss or oxidative change. The resin is supplied in a package having at least two compartments, each containing part only of a thixotropic resin systems; which is preferably over-catalyzed so that thorough mixing is not necessary. The packages have compartmental seals which are opened prior to insertion, with preferably some pre-mixing on discharge of the resin from the package as a bolt is placed into the hole in the rock. The package material is dead fold, and non-resilient so as to be compressed beyond the bolt. The shell is then expanded, with the thixotropic characteristics of the resin holding the resin in place around the expansion shell. The expansion of the shell gives immediate anchorage, and the later hardening of the resin gives a delayed but more permanent anchorage. The same package is useful in anchoring to masonry and concrete.

Inventors

• 👤 William Herbert Montgomery

Bibliographic Details