Support unit

摘要

In a support unit for underground longwall-face workings which consists of a floor-bar construction, a vertically adjustable roof-support construction supported via at least one prop, an advancing device and a control device, where the allocated section of a transport and/or haulage means laid at the coal face is connected in its front protective space forming the main transport zone either to the advancing device or to the floor-bar construction and its position in both cases can be adjusted and locked in accordance with the respective level by the connection to the control device, a secondary transport zone for the allocated section of a transport and/or haulage means laid in this zone is created in the protective space lying towards the goaf side by the floor-bar construction in this area having at least one sliding and/or rolling track for the goaf-side section or a revolving winning machine, movable in the longitudinal direction of the face, so that, while saving considerable drive energy and cutting down on expenditure, avoiding machine stables for the plough, eliminating reversal at the plough with the disadvantages of the high switching frequencies and the dissipation of kinetic energy, omitting the trouble-prone bottom strand in the conveyors, and eliminating the difficult-of-access plough-chain guides susceptible to briquetting, the integration of novel ... by intermediate drives in ... Original abstract incomplete.