Method for mining of rock or ore according to the block caving p

Details Method for mining of rock or ore according to the block caving p Method for mining of rock or ore according to the block caving p

1975-08-18

1978-02-07

Purser, Ernest R.

Mining or in situ disintegration of hard material

Mine layouts

299 18, E21C 4100

Patent

active

040723526

ABSTRACT:
There is provided a method for extraction of rock or ore according to the block caving principle comprising driving, at several levels, principally straight, parallel and horizontal drifts into the lower part of a block, choosing the distance between the drifts at each level so that remaining supporting pillars will cover at least 40% of the block area, undercutting the block from the drifts in such a way that the drift openings toward the undercut area and the drift coverings will be arranged in steps, the drift openings being utilized as draw-points for the caving material and the number of drift levels being chosen with regard to desired horizontal distance along the direction of the drift between the draw-points at adjacent levels.

REFERENCES:
patent: 906765 (1908-12-01), Anderson
patent: 1502030 (1924-07-01), Goodney
patent: 1842664 (1932-01-01), Elsing
patent: 2298599 (1942-10-01), Smith
patent: 2536869 (1951-01-01), Bucky
patent: 3897107 (1975-07-01), Haglund

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