Cartridge for rock-bolting

摘要: A frangible cartridge for anchoring a reinforcing element such as rock-bolt in borehole drilled rock strata, example an underground mine roof, contains separate constituents (A) aqueous liquid and alkali metal silicate (B) gelling agent the silicate, being capable of forming gel from when brought into contact therewith result caused to break mix together within so form grouting composition around element, hardened serving anchor borehole. In preferred embodiment, hydraulic substance cement is incorporated constituent by present contents are mixed element. The invention safer use, particularly coal mines, than conventional resinous cartridges.