EXTRACTIVE INSTALLATION, IN PARTICULAR FOR MINING WORKS, AND METHOD FOR CONTROL OF EXTRACTIVE INSTALLATION

摘要

The invention relates to an extractive device, particularly for mining, comprising two drive stations (1, 4) and a drive chain (6) circulating between the sprockets (3, 5) thereof. In order to be able to detect a hanging chain or chain wear on a supply chain in a supply system (10) or a plane chain in a plane system, magnetic sensor units (20) are provided for detecting at least one chain state of the drive chain, wherein each sensor device (20) comprises a transmitter formed by a static or dynamic magnetic field generator and a detector field (22) provided with a plurality of magnetic field detectors (23) as a detector that are disposed to the side of a passage for the strand of the drive chain (6) to be scanned. The invention further relates to a method for controlling an extraction device for preventing hanging chains.