Apparatus for advancing a low-height drift through a subterranean structure
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United States of America Patent
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Jul 14, 1981
Grant Date -
N/A
app pub date -
Nov 2, 1979
filing date -
Nov 4, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for cutting a flat elongated channel, chamber or passage in subterranean strata, e.g. a crosscut between two mine galleries or shafts, which comprises upper and lower shoes or shields which can be spread apart by a fluid-cylinder system and to which a frame is connected by further fluid cylinders, this frame carrying an excavating worm whose flights are formed with picks for removing the face of the channel to be advanced. A conveyor extends past the frame or through the latter to carry rearwardly the detritus excavated by the worm.
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