Hydraulic striding frame borne mine pneumatic backfilling mechanism - has adjustable support units on support beams sliding on floor skids

摘要

Advancing units, with double-action cylinders, mounted on floor skids of individual support frames, bear support devices on the back filling side. They are used for pneumatic backfilling carried on hydraulic stricting support frames, in a mine. Each advancing unit (8-10) has a support beam (8), displaceably mounted in the floor skid (1) of the frame concerned. The support devices (12-26) are adjustable into a prescribed central setting on the beam, with centering cylinders (20) and can slide outwards from this on two sides, along the face. The duct and screen wall are precisely guided in the striding direction regardless of skids.