SECTION OF POWERED SUPPORT OF WORKING FACE OF THICK BED WITH FORCED COAL EXTRACTION Russian patent published in 2014 - IPC E21D23/00 

FIELD: mining.

SUBSTANCE: section of a powered support of a working face of a thick bed with forced coal extraction comprises a slab hingedly connected to a fence at its one side, a base hingedly connected to the fence at its other side, hydraulic props connected to the base and slab, advancing rams installed on the base. In the fence there is a rectangular opening that narrows in direction from the space behind the support to the working space of the support. At the same time the opening is closed with hydraulic jacks of cover control and is hingedly connected to the fence. In the cover in the space between hydraulic jacks of control there is a hole with the possibility of rotation in the vertical plane. Also in the cover there is a perforator, directed with an actuating element towards the opening. In the opening section there is a chute installed with vertically oriented boards and bottom. The chute is made of three metal sheets, installed in series along with the travel of transported material as overlapping each other. To the bottomhole edge of the first and second sheets there is a thick-walled scraper welded, which is oriented along the normal line to the plane of the following sheet. In the boards of the chute symmetrically to its axis, in parallel to the plane of the second sheet and below it there are slots, where fingers of the second sheet are inserted, being welded to it perpendicularly to the axis of the chute along the edges. At the bottom the second sheet is connected to the boards of the chute by means of a hydraulic jack of movement along the slots. At the same time the angle of inclination of the first sheet of the chute bottom to the horizon is more than in the second one, and in the second one - more than in the third one.

EFFECT: higher efficiency of using a powered support in development of thick coal beds with controlled extraction of under-roof layer due to expansion of its capabilities and area of application by using a charging chute and equipment of the support with an element for breaking of bulk pieces.

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