Mining or in situ disintegration of hard material – Hard material disintegrating machines – Sidewall-working
Patent
1980-01-14
1981-11-03
Pate, III, William F.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Sidewall-working
E21C 2910
Patent
active
042982316
ABSTRACT:
The invention is concerned with underground mining equipment, primarily but not exclusively for the mining of coal by the system known as the "long wall system". Where a coal cutting machine is driven along the wall face by the use of a haulage chain anchored at opposite ends of the face, to avoid the problems associated with the establishment of slack chain behind the machine, take-up means is provided at at least the end of the working from which the machine undergoes a working traverse to remove material from the face. Control means is provided to render said take-up means operative, to take up the slack produced in the chain, during such a working traverse of the cutting machine, and to render the take-up means inoperative, to provide a substantially fixed anchorage on a return traverse of the machine. Preferably such take-up means is provided at both ends of the working.
REFERENCES:
patent: 3594043 (1971-07-01), Weber et al.
patent: 3790210 (1974-02-01), Georg
patent: 4037876 (1977-07-01), Georg
patent: 4190295 (1980-02-01), Boast
Goff James R.
Spence Adam M.
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