| 摘要 |
<p>A signal is generated which varies with the distance between a mining machine and a cable trolley coupled by a rope to a winch disposed toward the lower drift of an inclined mine seam. The cable trolley moves along the face of the mine seam to guide and loop a trailing cable and/or water hose extending onto the mining machine. The winch is controlled in response to the signal for exerting tension inversely proportional to the distance between the cable trolley and the mining machine. The winch is driven by an electric torque motor or a hydraulic motor. In a further embodiment, the signal which is generated to control the winch varies the pull by the trailing cable and/or water hose upon the mining machine. This signal is used for controlling the winch in the same manner, namely, inversely proportional to the distance between the cable trolley and the mining machine.</p> |
