Coal mining machine and coal seam mining method for lump coal mining

Abstract

The invention discloses a coal mining machine for lump coal mining and a coal mining method. The coal mining machine comprises a body and a cutting part arranged on the body, wherein the number n of helical blades arranged on a drum of the cutting part is more than D / P, the helical angles of the helical blades are 5-30 degrees, and D and P refer to the width and pitch of the helical blades, respectively; the number m of cutting picks arranged on each helical blade is determined by the hardness coefficient f of a mined coal seam; when the hardness coefficient f of the mined coal seam is 2.5-3.5, m is equal to 7-10; when the hardness coefficient f of the mined coal seam is more than 3.5, m is equal to 9-17; the mining method comprises the following steps of 1, setting mining process parameters, namely setting the rotating speed of the drum, traction speed, cutting thickness, the rotating direction of the drum and cutting depth; and 2, mining the coal seam in a unidirectional coal cutting manner. The coal mining machine disclosed by the invention is reasonable in structural design, the method is simple, convenient in implementation and good in using effect, and the lump coal yield of a fully mechanized mining face can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of coal seam mining, and in particular relates to a coal mining machine for lump coal mining and a coal seam mining method. Background technique [0002] Because the production of lump coal is affected by many factors such as the strength of the coal seam itself, geological conditions, coal mining technology, and reloading process, the output only accounts for about 10% to 30% of the total output of raw coal. In the process of coal transportation, due to the difference in the drop of the transfer point and the way of coal falling, the lump coals collide with each other when they fall, causing serious loss of lump coal, and the lump coal rate drops by more than 20% to 30% during the transportation process. Therefore, under the mining process conditions of the existing fully mechanized mining face, the coal body is excessively crushed, and the production lump coal rate of the whole mine is low. According to s...

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Problems solved by technology

However, most of the above-mentioned methods for increasing the lump coal rate are in the theoretical research stage, and the operability is poor, and the effect of increasing the lump coal rate in the fully mechanized mining face is not good.

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