A New Method of Grouting Bolts for Roof Support

CIM Bulletin, 1972

N. M. RAJU, Scientist, B. P. VERMA, Scientist, DR. B. SINGH, Assistant Director, and DR. K. N. SINHA, Director, Central Mining Research Station, Dhanbad, Bihar, India

The paper describes a new method of grouting bolts developed at the Central Mining Research Station at Dhanbad in India. This method makes use of wire-mesh sleeve instead of the expensive metal tube to insert the cement mortar into the drill hole. The field trials confirmed that the method is cheap and an effective system of support.
Keywords: Anchorage, bolts, mesh, mortar, strata, Bolts, Cement, Cost, Costs, Drill, Drills, Mine, Mines, Strength