136221 ⎘
Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor; Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor Connecting devices between the head or foot of a prop and the cap or base of the roof support
Roof Support Unit for a Mining Machine
#2Advancing ram pin retention device
#3Advancing ram pin retention device
#4Prop head bearing device for shield supports
#5Prop head bearing