The main components of the roof support system are the different types of shields used in longwall mining operations to guard personnel and machines from a collapsing roof. The combination of Shearer, Armoured Face Conveyor and Roof Support Shields is commonly used in longwall mining operations. The shields close the gap which is generated by the extraction cycles of the Shearer. After the Shearer passes a shield or group of shields, the gap is closed by moving the shields towards the coal face using hydraulic force. It is possible also to move each shield separately. [1, P. 1409]
This document contains OPC UA type definitions for the Roof Support System.