| 摘要 |
The present invention relates to mining machinery and presents a new an improved machine, and components therefor, suitable for mining tar sands and other soft materials such as soft coal, oil shale and so forth. The machine can be used both above ground and below ground, and is particularly suitable for underground mining, to take advantages, for example, of the absence to exposure to inclement weather, excessive moisture, and for other reasons. Underground mining use of the machine is particularly suitable since the tar sands will not freeze up when the mining function is accomplished below-grade. The machine itself has a cutting face comprising a series of cutting heads that may be rotated in the same direction, revolve at the same speed, and inter-mesh so as to provide for an effective solid cutting surface. The machine is provided with air compressor means for blow cuttings rearwardly of the machine through a provided trough carried by such machine. The deck or primary plate of the machine can be adjusted for incline or decline so that a variety of mining functions can be accomplished as will hereinafter be explained. The track drives are provided with means for advancing the machine forwardly, rearwardly, turning the same about a vertical axis, or indeed turning the machine in any desired manner. This is accomplished by a pair of variable speed motors, with gear boxes, that are supplied for driving the respective track drives on opposite sides of the machine.
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