Mining or in situ disintegration of hard material – Processes – Breaking down by direct contact with fluid
Patent
1978-03-28
1980-01-01
Purser, Ernest R.
Mining or in situ disintegration of hard material
Processes
Breaking down by direct contact with fluid
299 34, 299 81, E21C 2734, E21C 2560
Patent
active
041813634
ABSTRACT:
A mining method for cutting away hard mineral materials of a mining face, comprises, undercutting the mineral material by directing a liquid jet into the running face to form a mineral slab which overlies the undercutting and breaking the bond of the slab from the main face by striking it with a wedge-shaped impact tool in the undercut area and conveying away the broken-off material. The apparatus for carrying out the mining operation comprises a machine which is adapted to run along the mining face alongside a conveyor for conveying away the material. The machine includes an operating mechanism for moving a breaking head at each end inwardly into the mine face and along the mine face. The breaking head carries a percussion wedge member which may be driven into the mine face. In addition, it carries a nozzle assembly for directing a liquid jet at high pressure against the mining face so as to undercut an area thereof and to leave a slab overlying the undercut area which may be broken away by the wedge-shape percussion member.
REFERENCES:
patent: 1637531 (1927-08-01), Morgan
patent: 3151912 (1964-10-01), Herrmann
patent: 3542142 (1970-11-01), Hasiba et al.
patent: 3758160 (1973-09-01), Hilton
patent: 3924698 (1975-12-01), Juvkam-Wold
Goris Heinrich
Gunther Roland
Ogorek Kurt
Schwarting Karl-Heinz
Witulski Wilfried
Gutehoffnungshutte Sterkrade A.G.
Purser Ernest R.
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