Method of rock bolting, and a device, and a roof bolting...

Details Method of rock bolting, and a device, and a roof bolting... Method of rock bolting, and a device, and a roof bolting...

E - Fixed Constructions

21

D

61/47

E21D 20/02 (2006.01)

Patent

CA 1236987

Abstract: In roof bolting, when an anchor rod (24) is to be inserted in a borehole (26) in the rock, a cement grout is ejected as a jet from a nozzle (22) located at the mouth of the borehole to partially fill the hole before the rod is forced into the borehole. The jet of grout should have such a velocity that it reaches the bottom of the borehole. A grout pump (45, 60) forces the grout through a hose (28) to the nozzle (22).

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