| 摘要 |
FIELD: mining. ^ SUBSTANCE: support section for extraction of pillars in reverse order at room-and-pillar development system of underground bed deposits of minerals and mineral products can be located in development mine roadway between two pillars, and can be moved to the other position and has support device adjustable as to height, intended for supporting the roof and pressed to the roof by means of support posts. Support device has two support beams located at some distance from each other, each of which rests by means of two support posts and one articulation linkage located between support posts on the support base. Between support beams there located is movable bedplate on which by means of drive levers there fixed in movable manner is at least one of support beams for adjusting the distance between support beams, and by means of which the support section can be transported on transport vehicle. ^ EFFECT: possibility of folding the support section as to height and width, excluding unintentional loosening of the roof layers, possibility of moving folded support sections through sections driven apart and installed with a brace. ^ 12 cl, 9 dwg |
