Device for mining of thick strata of useful minerals

Details Device for mining of thick strata of useful minerals Device for mining of thick strata of useful minerals

1979-03-20

1980-12-23

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

299 32, 299 33, E21C 2734

Patent

active

042406668

ABSTRACT:
A device for mining thick coal strata comprising a plough pressed in the ion of the floor by a ram, whereas in the vicinity of the roof the plough is pressed by a unit fixed to a canopy of the lining. The unit is provided with guides on which the plough is supported through a slide. A lever of a distributor is deflected by the plough and causes the unit to extend by an amount equal to the web of the plough.

REFERENCES:
patent: 3419312 (1968-12-01), Dommann
patent: 3847438 (1974-11-01), Huttenbrauck et al.

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