Longwall mining machine for the mining of thick mineral seams
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United States of America Patent
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Nov 28, 1989
Grant Date -
N/A
app pub date -
Oct 24, 1988
filing date -
Oct 29, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A drum cutter mining machine translatable along a longwall conveyor includes an auxiliary cutting drum for breaking up pieces of mineral carried by the longwall conveyor system. The auxiliary cutting drum is supported by a jib and an arm extension affixed in a fixed relationship with a support arm. The auxiliary cutting drum is positioned by the same actuator which pivotally positions the drum-cutter cutting drum at a desired cutting height at the mine roof and other times at the floor. Positioning of the cutting drum at the desired cutting height automatically positioned the auxiliary cutting drum.
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