A kind of slot cutting mining lump coal machine

Abstract

The invention discloses a lump coal cutting mining machine. A first cutting part and a second cutting part are symmetrically arranged at the two ends of a machine body which is further provided with a third cutting part. Conical drums of the first cutting part and the second cutting part are driven by connecting rocker arms to conduct lifting height adjustment. A rear slot cutting drum of the third cutting part is connected to the middle of the machine body through a speed reduction arm, a cylindrical blade-free drum body of the rear slot cutting drum is spirally provided with cutting teeth, an inverted cone external expansion type end plate is arranged at the front end of the cylindrical blade-free drum body, and cutting teeth are arranged on the periphery of the inverted cone external expansion type end plate. According to the lump coal cutting mining machine, bidirectional full-seam mining can be achieved, coal seams are subjected to cutting at first and then subjected to coal dropping layer by layer in a fluctuation mode, the traveling speed is relatively high, the lump coal particle size, the lump coal rate and the mining efficiency can be effectively improved, power consumption, the damage quantity of the cutting teeth and the dust generating quantity are reduced, and low-power-consumption mining of hard coal seams can be achieved.

Description

technical field [0001] The invention relates to a slot cutting machine for mining lump coal, which belongs to mining machinery. Background technique [0002] At present, coal mining is generally carried out with a drum shearer. When working, the drum rotates and moves radially, the picks grind and crush the coal, and then the coal cut off by the picks is pushed along the axis of the drum to the scraper conveyor on the working face by the helical blades. The working principle of the pick drop coal is milling type blanking, the loss of the pick is large, the energy consumption is high, and the work efficiency is low; and the lump coal rate is low, and the coal dust is large, causing problems such as bad coal mining environment and potential safety hazards. And it is difficult to mine hard coal seams. The economic value of lump coal is more than twice that of crushed coal. The lump coal rate is also an important economic and technical indicator for coal mining enterprises, an...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of lump coal ratio and excessively hard coal seam, the common method at present is to release the vibrating gun first to destroy the coal seam bedding, reduce the strength of the coal seam, and then use the drum shearer to mine coal, although this can also pass through the hard coal seam. The increased lump coal will reduce the working efficiency of the shearer and affect the roof to a certain extent, which will increase the difficulty of roof safety maintenance and increase additional costs

In addition, there have been many ways and methods to adopt lump coal, all of which have certain limitations, and have failed to effectively improve the lump coal rate and lump coal particle size of coal mining.

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