136240 ⎘
Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
Sub-classes:Hydraulic Support with Quick Response Function for Coal Wall Spalling
#2COAL-BASED SOLID WASTE TRANSPORT AND FILLING INTEGRATED MACHINE MINING SYSTEM AND METHOD
#3Distributed coal cutting device for longwall face of coal mine
#4Hydraulic assembly for a mining system
#5Self-moving tunnel support canopy
#6Face equipment comprising hose levels placed between the face conveyor and the shield support frames
#7System and method for enabling machine movement
#8Control device for an extracting unit in the work face of a mine
#9Supply line
#10Coal face support in a mine
#11Valve for hydraulic props of shield-type support frames, and shield-type support frame
#12Method and device for pressure amplification in cylinders, in particular hydraulic rams
#13Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine
#14Control mechanism for the extension units in the longwall face of a mine
#15Individual controller for shield support frames
#16Similar simulation experimental device of hydraulic energy-absorbing roadway support