The under working face equipment of a self-supporting structure is a special collecting scraper conveyor. It is installed and moves on the footwall of an opening and its front part passes over on a undercarriage over the end part of the belt conveyor connected to it. The force necessary for this traverse is produced by the straight hydraulic motors on the travelling part of the equipment.
In case the electrical equipment is installed on the positioning plates of the under working equipment there is no necessity to install the suspension railway for its operation. The under working is equipped with grips and stretching straight hydraulic motors for the carrying ropes of the belt conveyors.
Anchorage of the working face KPD-F 02 conveyor enables mechanical connection between the self-supporting collecting scraper conveyor and the main drive unit of the face conveyor, which enables to move PZF simultaneously with the working face conveyor without interrupting the working face extraction.
The PZF under working face equipment is adjusted for protected cable lines alongside the collecting scraper conveyor as far as the working face.
| Haulage: | 700 - 1 000 t/h (according to the type) |
| Max. travel length of self-supporting part: | 12 m |
| Total output of motors: | 75 - 200 kW |
| Width of the used scrapper conveyer: | 700 - 800 mm (according to the type) |
