Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1978-06-20
1979-02-13
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
E21D 1544
Patent
active
041393252
ABSTRACT:
A mining installation comprises an armoured conveyor made up of a plurality of pans articulated together end-to-end, a plurality of hydraulically powered, self-advancing mine roof supports located side by side along the goaf side of the conveyor, each roof support being connected to a pan by one or more double-acting advancing rams, and each having a base means incorporating a pair of spaced, elongate base members seating on a mine fooor, each support further having a forward end intended to be located, in use, adjacent the goaf side of the conveyor and a rearward end intended to be remote from the conveyor, a rail located between the base members and attached at a forward end thereof to a pan of the conveyor, and a lifting jack carried by the base members at or near the front end thereof and operable on the rail to lift the front ends of the base members from the mine floor and in this condition be advanced towards the conveyor by operation of the one or more double-acting advancing rams.
REFERENCES:
patent: 3357742 (1967-12-01), Dommann et al.
patent: 3640581 (1972-02-01), Rassmann et al.
patent: 3915500 (1975-10-01), Schlusener et al.
Bower Lewis R.
Wake Malcolm
Fletcher Sutcliffe Wild Limited
Taylor Dennis L.
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