Method of mining bedded mineral deposits with hydraulic...

E - Fixed Constructions – 21 – C

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262/6

E21C 41/06 (1980.01)

Patent

CA 1086784

ABSTRACT OF THE DISCLOSURE The present invention provides a method of mining bedded mineral deposits with hydraulic excavation, including dividing a bed being mined into long pillars extending along the strike by means of dividing accumulating parallel and ventilating entries as well as rise workings for slurry flowing-down material lifting and gang ways on the raise, running extraction workings in each said pillar and interconnecting them with air holes, providing boundary workings, parallel to said extraction workings and connecting them therewith with cut breakthroughs, with the distance between adjacent cut breakthroughs being set within the width of a single stoping washing, expanding said cut break- throughs down to the seam floor, by providing the abovesaid workings in the long pillar being mined along the strike two- bench mining bends (short pillars) defining short working faces, setting a hydromonitor in an invariable position in said extrac- tion working and performing with its aid hydraulic extraction of the mineral in each stopping washing in both adjacent benches, in the direction of the gravity flow of the slurry along the working commencing with the expanding of the cut breakthrough in the lower bench down to the seam floor, whereby the main stream of the slurry is removed from the stopping washings via said boundary workings omitting the extraction ones.

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