| 摘要 |
<p>A mine communication system comprises a control computer 10 for a plurality of mine roof supports 20, a plurality of control units 11 each associated with a respective roof support 20, the control units 11 being arranged so as to control and monitor the operations of the roof supports 20, at least one portable data unit 12 for use by an operator on the mine face, means for transmitting information from the support control computer 10 to the portable data unit 12 and means for transmitting information from the portable data unit 12 to the support control computer 10. <IMAGE></p> |
