Mechanical coal mining method

Abstract

The invention discloses a mechanical coal mining method. The mechanical coal mining method comprises the following steps of arranging of a working face, underholing type coal mining, coal raking type coal mining and the like, wherein a coal mining and conveying integral machine is arranged at the working face and consists of a coal mining and conveying main machine and a cantilever structure bracket; the coal mining and conveying main machine is connected with the free end of the bracket; the free end of the bracket is provided with a composite movement track integrating the front and back movement and the lifting movement; the coal mining and conveying main machine is provided with an underholing type coal mining part and a coal raking type coal mining part; a coal groove is formed in the top end of the coal wall in an underholing type coal mining process; the coal mining and conveying main machine is pushed down by the bracket to move in a coal raking type coal mining process. The mechanical coal mining method has the beneficial effects that the coal mining is performed by the coal mining and conveying main machine which does composite movement integrating the swinging and lifting movement and the front and back movement; the recovery rate of a coal bed is high, the amount of gangue in a coal product is small, and the quality is high.

Description

technical field [0001] The invention relates to a coal seam mining technology, in particular to a mechanized coal mining method. Background technique [0002] my country is rich in coal resources, with a large amount of storage and a variety of occurrences. According to the division of coal seam thickness in my country, the thickness of 0.8-1.3m belongs to thin coal seam, and the thickness of less than 0.8m belongs to extremely thin coal seam. In my country's coal reserves, the recoverable reserves of thin coal seams are about 6 billion tons, accounting for about 20% of the country's total coal reserves. %. However, the output of thin coal seams only accounts for 10.4% of the total national coal output, and this proportion is still showing a gradual downward trend. The main reasons are the low degree of mechanization of coal mining and transportation, low yield and efficiency of the working face, high excavation rate, high mining cost, and high labor intensity. However, wi...

AI Technical Summary

Problems solved by technology

Although this machine can realize mechanized coal mining, when the coal seam becomes thicker, its mining efficiency is low; when the coal seam becomes thinner, the coal mining resistance is large, the advancement is difficult, the energy consumption is high, and the gangue content is large, and the quality of coal products is low.

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