Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1977-07-28
1978-10-17
Shapiro, Jacob
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
E21D 1700
Patent
active
041201647
ABSTRACT:
A method and apparatus is provided for supporting an underground mine roadway or tunnel having a series of spaced rigid support members installed along the roadway or tunnel, the rigid support members being erected in turn adjacent to newly exposed mine or rock surface as the roadway or tunnel is extended. Deformable bags are arranged between the rigid support members and the adjacent mine or rock surface. In addition deformable limbs extend from the last installed support towards the next support to be erected, the bags and the containers being filled with flowable material including cement and a conveying medium.
REFERENCES:
patent: 3396545 (1968-08-01), Lamberton
Coal Industry (Patents) Limited
Shapiro Jacob
Wray James C.
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