Frictional mining bolt

Details Frictional mining bolt Frictional mining bolt

2005-08-30

2005-08-30

Singh, Sunil (Department: 3673)

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

C411S045000, C411S069000, C411S070000

Reexamination Certificate

active

06935811

ABSTRACT:
A system for mine roof reinforcement includes a bearing plate and a tubular member with an inner surface, an outer surface, first and second free ends, and an enlarged portion disposed proximate one of the free ends. The system also includes a projectile and an insertion member for being received in the tubular member. In addition, a method for inserting a bolt in rock includes: forming a borehole in rock; placing a bearing plate with an opening therein against the rock so that the opening is aligned with the borehole; disposing a tubular member in the borehole and opening so that an enlarged end of the tubular member abuts the plate; and mechanically expanding the tubular member so that an outer wall thereof frictionally engages the rock.

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