POWERED SUPPORT WITH ELEMENTS OF SIMULTANEOUS CONTROLLED DISCHARGE OF SELF-FALLING COAL FROM INTERLAYER THICKNESS Russian patent published in 2002 - IPC

FIELD: mining industry, supports of breakage faces intended for extraction of coal from thick strata when underground deposit is developed. SUBSTANCE: power support includes cutter-loader, face flight conveyer, sectional powered support. Each section of this support comprises floor hinged to frame, bases of hydraulic props and capping, hydraulic displacement jack hinged to floor and put on base, gear for discharge of self-falling coal from interlayer thickness, plate gate, hydraulic plant and vibrator. Chute to discharge self-falling coal from interlayer thickness with cross- section expanding towards unloading side and made fast to bearing beams of floor with bottom resting against base is mounted in cutaway of floor of each section of powered support. Chute bottom is coated with anti-friction material and plunger feeder in the form of inflexible plate which working surface is equipped with wedge knurls securing minimal resistance to movement of inflexible plate towards goaf and maximal friction and adhesion of its working surface while displaced towards coal discharge is installed on bottom. Plunger feeder is fitted with hydraulic cylinders anchored on bottom frame for reciprocating motion of inflexible plate. Power spaces of forward stroke and backward stroke of hydraulic cylinder are linked by pipe-lines to desk controlling operation of hydraulic cylinders with hydraulic pump with controllable productivity common for groups of plunger feeders. Half-group of hydraulic cylinders is connected in antiphase to another half-group. Discharge end of plunger feeder is located above face flight conveyer. Gangway to attend to units of powered support is installed above discharge end of plunger feeder and cutaway of floor in section for discharge of coal is shut by uncontrollable chain gate. EFFECT: reduced loss of coal in process of excavation, decreased ash content (clogging with enclosing rock) thanks to formation of common flow of coal above support with controllable, metered discharge. 3 cl, 10 dwg