Patent ID: 6509842
Filing Date: 2003-01-21
Classification: E21D

Abstract:
A longwall control system for controlling and remotely inspecting a longwall support comprising a plurality of hydraulically operated supports, the longwall control system comprising:a plurality of shield control devices respectively associated with the supports for rearranging the supports in the sense of robbing, advancing, and setting; detection devices for detecting inspection values associated with the operating parameters of the shield control devices; a hand-operated device comprising signaling devices; long-distance transmission devices for transmitting the detected inspection values from the detection devices to the hand-operated device, wherein the signaling devices provide signals representative of the inspection values transmitted to the hand-operated device; a control device for activating the shield control devices, wherein the control device is integrated into the hand-operated device and connects to the shield control devices via a control radio network for releasing functions and operating conditions respectively, wherein the control radio network and the long-distance transmission devices are interlocked so that the control radio network is disconnected by connecting the long-distance transmission devices, and the long-distance transmission devices are disconnected by connecting the control radio network.