Method and apparatus for utilizing the full capacity of a particular type of mine hoist for excavating deep shafts
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United States of America Patent
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Issued Date -
Nov 29, 2007
app pub date -
Feb 2, 2001
filing date -
Feb 3, 2000
priority date (Note) -
Abandoned
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Abstract
Disclosed is a device for excavating a mine shaft, comprising a pair of drums, each drum having a pair of regions. Each region is wound with one of a pair of hoist ropes. The device is provided with four refuse carriers, each of which is attached to one of the hoist ropes. Drive means is also provided for driving the drums to deliver two carriers at a time to a work site in the shaft.
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