Mining or in situ disintegration of hard material – Processes – With material-handling
Patent
1975-12-01
1977-05-24
Purser, Ernest R.
Mining or in situ disintegration of hard material
Processes
With material-handling
371425, 175 88, 175 91, 175173, 299 7, E21C 4100
Patent
active
040251195
ABSTRACT:
A method of strip mining in which a plurality of vertical shafts of square cross section are formed closely adjacent to one another with each shaft extending through overburden and a layer of valuable material such as coal. As spoil is removed in forming one shaft it is conveyed to a previously formed shaft and deposited therein. The apparatus includes a casing of square cross section, a cylindrical auger casing within the square casing, an auger rotatable in the auger casing and a square cutter at the lower end of the square casing. The latter is slidably mounted on a vertical track and is power driven vertically to force the cutter into the earth formation being worked. The auger is rotated under power to cut into the earth formation and remove spoil and coal therefrom. The upper end portions of both casings are formed with two sets of aligned discharge ports. A movable closure is provided for each set and a rake for each set. A conveyer for spoil has one end connected to the outer port of one set while a conveyer for coal has one end connected to the outer port of the other set. When one set is closed, the rake associated therewith is in an inoperative position. When a set of ports is open, the rake associated therewith extends into the uppermost convolution of the auger.
REFERENCES:
patent: 536340 (1895-03-01), Hanneborg
patent: 796477 (1905-08-01), Wallace
patent: 1814093 (1931-07-01), Rhodes
patent: 2561343 (1951-07-01), Crossley
patent: 3951459 (1976-04-01), Honeycutt
Purser Ernest R.
Robertson John A.
LandOfFree
Method and apparatus for strip mining does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for strip mining, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for strip mining will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-531781