Vicinity control for underground prop structure

摘要

The vicinity control has a pre-control block and a main control block associated with each prop frame, with hydraulic control lines extending between the pre-control valves (4) of one prop frame and the main control valves (8) of the next prop frame. The pre-control block and the main control block are combined in a single module (1,..6,8,...11, 13, 14) within each prop frame, the line connections provided by bores (5,10) within the longitudinal elements with the pre-control valves at the front broad side and the main control valves at the rear broad side.