Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means
Patent
1978-11-13
1981-01-06
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Stepper-type advance-causing means
299 17, 299 34, 299 81, E21C 2718
Patent
active
042432685
ABSTRACT:
A mineral, e.g., coal, mining installation employs a winning machine, such as a plough, equipped with cutting means and which is moved back and forth along a mineral or coal face and along a scraper-chain conveyor as is known per se. Roof support units are arranged along the goaf side of the conveyor and employ roof bars projecting across the roof of the working towards the mineral face. Shifting rams are provided to alternately advance the conveyor and the roof support units as the winning work progresses. The roof bars of the units are pivotably connected to forwardly-projecting components which act as carriers for swinging nozzles emitting high-pressure water jets which impinge on the face to create a channel at the roof zone thereof. The position of the channel can be adjusted by pivoting the carriers with the aid of hydraulic devices. Further swinging nozzles are located at the floor region, conveniently in a frame supporting the conveyor, and these further nozzles emit further water jets which create a channel at the floor zone of the mineral face.
REFERENCES:
patent: 3306665 (1967-02-01), Lobbe
patent: 3887235 (1975-06-01), Koppers
Grisebach Hans-Th.
Lobbe Armin
Gewerkschaft Eisenhutte Westfalia
Purser Ernest R.
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