Backfill shield for mine on sloping seam - is slid horizontally by rams in horizontal skid acting on hinge bracket

摘要

the backfill shield is for use in a mine with hydraulic working frames partic. with sloping seams. The individual shields swing vertically about points on the horizontal skid. These shields (1), which hinge on pins (6) in brackets (13) also slide in a horizontal plane under the action of hydraulic rams (14) mounted in the horizontal skid (14), typically for the width of a backfill area. Further rams (8) acting between frame (4) and shield can be provided to swing the latter, their stroke matching the sliding movement of the brackets and the swinging movement of the shields.