Control of coal face supports such as hydraulic props uses a hand-held radio controller linked to control elements on the face supports so that their functioning and condition can be interrogated and they can be lowered remotely

摘要

Support control is carried out remotely using a remote control device (37) that can receive reports on the condition of props (1-18) that are supporting the coal face. The functioning or operating condition of the supports is indicated via a display on the hand held controller (37). Face control (33) and prop control (34) elements are connected by radio etc. to the controller. The controller has button control keys that can for example command one of the props to be lowered etc.