Down-hole coal excavation apparatus

Abstract

A coal excavation device for thin and super thin coal bed includes coal excavation device, protective hydraulic bracket and scraper blade transmission machine. An electric liquid control system is included in a single bracket on the protective hydraulic bracket. The control system includes a bracket controller, electric liquid valve set, pressure sensor of hydraulic piston, routing sensor of moving hydraulic jack, routing sensor of balance jack, routing sensor of side push jack, hydraulic piston sensor and signal cables connected to related input port. Hydraulic cylinder and jack cylinders are connected to the valve set. Bracket controller is connected to the valve set. A left roller rail is extended to the bottom of the left slot. There is cable slot on the chute moving bracket with a cable hook to the slot right wall. The moving bracket is connected to the cable slot.

Description

technical field [0001] The present invention relates to coal mining equipment. Background technique [0002] Thin and extremely thin coal seams are widely distributed in my country and have abundant reserves. At present, the proven recoverable reserves of thin coal seams are about 6.15 billion tons, accounting for about 20% of the total recoverable reserves. According to statistics, the national key state-owned thin coal seam reserves are 2.529 billion tons. Due to the lack of mining equipment with good adaptability and high production efficiency, thin coal seam mining has low yield per unit area, high production cost, and poor economic benefits, so many coal enterprises give up thin coal seam mining, resulting in a serious waste of coal resources. With the continuous increase of mining efforts, the reserves of thick and medium-thick coal seams are decreasing day by day, and thin and extremely thin coal seams will surely become the main coal mining seams. Therefore, in or...

AI Technical Summary

Problems solved by technology

Limited by the space of the working face, the thin coal seam has problems such as deep coal seam burial, complex geological conditions, many faults, high mine pressure, low per unit yield, high roadway consumption rate, tight replacement, and poor working conditions for workers. Thin coal seam mining has always been a key issue in coal mining. Commonly used underground coal mining equipment includes: coal shearer, scraper conveyor, electro-hydraulic control thin coal seam cover type hydraulic support; common coal shearer is drum shearer, and coal shearer includes: drum, Motor, shearer hydraulic system, shearer spray dust suppression system, left roller, right gear; scraper conveyor commonly used in mining coal mines, including head power unit, tail power unit, multiple chutes, racks, scrapers , head pushing frame, tail pushing frame, sprocket, scraper, scraper chain, head transition slot, tail transition slot, head power device is equipped with reducer, connecting cover and motor; the chute includes the left slot side, right chute side, chute bottom plate, chute pushing frame on the right side of the right chute side; multiple chutes are distributed front and rear; the upper end of the left chute side is the left roller track of the coal mining machine; This kind of scraper conveyor is only suitable for the mining of thick and medium-thick coal seams; in underground operations, the chute needs to be moved frequently. During this process, the bolts connecting the chute and the chute are easy to loose and must be tightened in time. Doing this work underground is very intensive and dangerous, which also leads to a decrease in the service life of the chute; because the head power unit is fixedly connected to the front of the chute, the front of the chute can only be placed in the tunnel. When the shearer is working, the coal seam at the front of the chute cannot be excavated, and the coal mining rate is low; the electro-hydraulic control thin coal seam cover type hydraulic support includes a base, a hydraulic column, a front connecting rod, a rear connecting rod, a top beam, and a side guard , cover beam, pushing hydraulic jack, balance jack, side pushing jack, spray system inside the bracket installed in the inner wall of the top beam, electro-hydraulic control system; hydraulic column, front connecting rod, rear connecting rod and pushing hydraulic jack are respectively installed on On the base, the piston rod of the hydraulic column is connected to the top beam and hinged with it, the front connecting rod and the rear connecting rod are hinged to the cover beam, the front connecting rod, the rear connecting rod, and the rear connecting rod are hinged to the base, and the rear part of the top beam Hinged with the cover beam, the side push jack is installed on the top beam, the piston rod of the side push jack is fixedly connected with the side guard plate, the balance jack is installed on the cover beam, and the top beam is hinged on the piston rod of the balance jack; the lifting, lowering, A series of actions such as pushing and moving are controlled by the hydraulic system, so a number of hydraulic control valves and control valves are installed on the bracket.

The control valve is controlled by the worker pushing and pulling the handle, so the work of moving the frame is manually operated, the degree of automation is low, and the efficiency of coal discharge is low

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