| 摘要 |
<p>First and second sets of roof supports, a mining conveyor and a cutter associated with the mining conveyor are provided. Roof supports of the second set are intermingled with supports of the first set, and the two sets have different roof supporting canopy formations. Intermingling the two sets and controlling the advancement of roof supports of the first set separately from roof supports of the second set, enables both the cutting of material from the mine face and the stowing of packing material in an area behind the roof supports to be carried out simultaneously, and without interruption.</p> |
