Method for longwall mining with side-by-side arch sections

Details Method for longwall mining with side-by-side arch sections Method for longwall mining with side-by-side arch sections

1975-10-28

1976-09-14

Purser, Ernest R.

Mining or in situ disintegration of hard material

Processes

Stabilizing underground structure

E21C 4110

Patent

active

039803406

ABSTRACT:
In the underground mining of friable mineral deposits such as bituminous sands, method and apparatus are disclosed in which a working crosscut in the mineral deposit, is established, connecting two parallel operating tunnels, the front wall of the crosscut being unsupported and forming the mining wall, the roof and rear wall of the working crosscut being supported by a novel mining shield comprising a plurality of forwardly inclined, base supported arch members positioned in adjacent abutting relationship and each independently advanceable towards the mining wall. A conventional mining machine is employed under the mining shield in the working crosscut, operating across the full width of the mining wall. As the mining machine removes a cut, apparatus upon the mining machine advances individual mining arch sections forwardly into the mining face the depth of the cut, leaving the backs unsupported and free to collapse behind the advancing mining shield. The procedure continues until a blocked-out section of the mineral deposit is traversed. The mining operation being successively repeated in the collapsed mineral material until the mineral deposit is mined out.

REFERENCES:
patent: 2891778 (1959-06-01), Milik
patent: 3778108 (1973-12-01), Pennington et al.
patent: 3892442 (1975-07-01), Janssen

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