High-frequency communication from a moving mine hoistingvessel
Abstract
The operational work of a modern coal mine depends to a large extent on a properly and quickly functioning production communication system. The existing mechanical and electrical systems at the mine — shaft signaling between the receiving platforms and the machine room — although reliable in operation, cannot fully satisfy all the requirements of the hoisting operation. Thus, for example, in any accident involving the jamming of a cage in the shaft, when it becomes necessary to signal directly from the cage, an imperfect and inconvenient traction signal has to be used. It is even less convenient to use such signaling during work in the shaft (inspection and repair of guides, shaft lining, cable laying, etc.) associated with frequent stops and movements of the hoisting vessel (cage or skip) for short distances.
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