Five-drill air inlet and outlet type coal mining machine

Abstract

The invention relates to a five-drill air inlet and outlet type coal mining machine, applicable to mining of a coal bed with pitch of 0-25 degrees, thin and extremely thin coal beds containing gas and a liberation coal bed. The five-drill air inlet and outlet type coal mining machine mainly comprises a hydraulic motor, a bracket, a thrust cylinder, a transmission case and a spiral bit. Five drills are transversely arranged, thus mining efficiency of the coal mining machine is improved; and three intermediate drills are arranged in advance, and mining energy consumption is reduced by utilizing a crisp pressing effect of the coal bed. A machine set is provided with a blast fan and an induced-draft fan to realize ventilation of a working surface, and gas concentration is diluted, thus the machine set can mine a high-gas coal bed. A transmission drill rod and a ventilation drill rod convey coal at the same time, thus coal conveying efficiency of the coal mining machine is greatly improved. The transmission case adopts a bevel gear driving manner, a transmission case body is of a sectional type structure, volume of the transmission case is reduced, and coal passing efficiency of the transmission case is improved, thus the drills are avoided from being blocked and turning. The machine set can realize ventilation of a mining working surface, efficient mining of high-gas thin and extremely thin coal beds is realized, and the machine set has high working stability, reasonable structural arrangement, strong component interchangeability and easiness in maintenance.

Description

Technical field [0001] The invention relates to a five-bit inlet and outlet air-drilling coal shearer, which is especially suitable for coal seam inclination Mining of thin and extremely thin coal seams and high gas coal seams of liberation coal seams. Background technique [0002] my country is the world's largest producer and consumer of coal. With economic growth, the demand for coal is increasing. Thin and ultra-thin coal seams are widely distributed and have large reserves. The proven reserves account for as much as 20% of the total coal reserves, but the mining volume only accounts for about 8% of the total output, which is much lower than the proportion of its reserves. All coal mining enterprises are facing the problem of mining thin and ultra-thin coal seams, especially the declining reserves of medium-thick coal seams. The development of mining technology for thin and ultra-thin coal seams is extremely important, and its mining is an overall problem to be solved urgent...

AI Technical Summary

Problems solved by technology

Due to the difficulty of mining thin and extremely thin coal seams, my country introduced a three-bit shearer from Ukraine at the end of the last century. Compared with plows and drum shearers, it has significant advantages in mining thin and extremely thin coal seams: The extremely thin coal seam has been effectively mined, and the unmanned working face mining has been realized, the working environment of the workers has been improved, and the labor intensity of the workers has been reduced; however, the three-bit drilling shearer has low cutting efficiency and low coal transportation efficiency. , Low adaptability to gas-containing coal seam mining and time-consuming drill pipe connection; the transmission box of the three-bit drilling shearer is large in size and low in coal passing efficiency, which makes the drill bit stalled, which in turn leads to the deviation of the drilling tool and limits coal mining. Drilling depth of the machine

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