| 摘要 |
<p>This invention relates to an equipment for shortwall mining useful for extraction of pillars (2) in underground coal mines, which comprises a series of self-advancing powered supports (1) being placed along the pillars under extraction, the pillars being located within a panel (3) which is being surrounded by barrier pillars (4). An armoured face conveyor (5) is fixed to said barrier pillars. The said series of supports (1) has at its goaf end a self-advancing powered roof support (6) provided with attachments like side shield (7) with plate (8), hanging steel guards (9), side arms (10), front side hook (11) and back side hook (12). The side shield (7) is hung from the canopy end at the top of the support, and is supplemented with two or more guards (9) freely hung from the inner side of the side shield (7). Two or more smaller hydraulic rams (10) are horizontally fixed within the structure of end support (6) to support the side shield (7). The base frame of the end chock shield is provided with a plurality of hooks (11,12) at its front and rear side to facilitate pulling of the end support, and the armoured face conveyor (5) is provided with a shearer (15) having a cutter drum (16) coupled with a centrally located ranging arm (17). The outbye end of the said armoured face conveyor (5) has a drive head being curved by right angle being set upon a light duty chain conveyor (18) like a freely advancing bridge, which chain conveyor is connected to a belt conveyor (19) in the outbye of the panel (3). <IMAGE></p> |
