| 摘要 |
A continuous mining linear advance system comprises a dual action drum cutter for removing coal from a face of the entry. The dual action drum cutter removes the coal from the face by shearing across the face in a direction transverse to the direction of advance and by cutting directly into the face in the direction of the advance. A conveyor system operatively associated with the dual action drum cutter carries away coal removed from the face of the entry in a continuous, non-interrupted manner. A number of self advancing roof supports positioned adjacent the dual action drum cutter support the roof in the immediate vicinity of the face. Roof bolting devices positioned behind the self advancing roof supports install roof bolts, and a pillar casting system positioned behind the roof bolting devices constructs a series of pillars which provide long term roof support. Each pillar is constructed from a quick-setting, concrete-like material and extends between the floor and the roof and is positioned about midway between the two opposed ribs of the entry. Isolation curtains positioned between consecutive pillars prevent air flowing down the intake side of the entry from short circuiting to the return side of the entry.
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