Longwall mining system and archshield for mining tar sands, oil

Details Longwall mining system and archshield for mining tar sands, oil Longwall mining system and archshield for mining tar sands, oil

1974-09-26

1976-05-25

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

61 45D, 299 11, E21C 2724, E21C 2902

Patent

active

039588300

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 separated from the mining equipment 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: 2300028 (1942-10-01), Wilcox
patent: 3280570 (1966-10-01), Pollard

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