STABILISING BOLT ADAPTOR, GROUTING INJECTION NUT, COMBINED GROUTING INJECTION NUT AND STABILISING BOLT AND METHOD FOR USING THEM

摘要

A stabilising bolt adaptor (10) for use with a drill head/grouting injection system, said adaptor having first (11) and second (13) ends and including: a drill engaging portion comprising a surface (12) engageable for rotational movement by a drill chuck (15); at least one inlet (14) for receiving at least one component of a grouting composition, wherein one of said inlets is located at said first end (11) of the adaptor (10) and is sealingly engageable with a grouting injection means (17) for injecting said at least one component of said grouting composition; a bolt connecting means (20) for connection with a hollow stabilising bolt (40) having a longitudinal bore (44) therethrough; the or each inlet (14) leading to a common conduit (28) extending to an outlet (30), said outlet (30) opening into the longitudinal bore (44) of the hollow stabilising bolt (40) when in use. The invention also relates to a grouting injection nut, a combination grouting injection nut and stabilising bolt, and a method for stabilising a formation comprising rock, coal, soil and/or concrete or the like, using the combination grouting injection nut and stabilising bolt.