Coal mining method and coal mining apparatus implementing same

Abstract

The invention relates to a coal mining method and a coal mining apparatus. The coal mining method comprises the following steps of: directly inserting a wedge-shaped body into a coal layer on the coal layer parallel to a goaf surface; continuously advancing the wedge-shaped body forwards; continuously cracking and collapsing coal bodies outside the wedge-shaped body and facing the direction of the goaf surface; continuously clearing a top plate, a bottom plate and dropped coals after the coal bodies are collapsed in the front; and continuously conveying the collapsed coal bodies and the cleared dropped coals by a conveyor to complete a continuous coal mining process. The apparatus implementing the coal mining method comprises a coal mining head and an auxiliary mechanism, wherein the coal mining head comprises the wedge-shaped body, a support and a plough-shaped plate; the wedge-shaped body and the plough-shaped plate are arranged on the support; the top plate and the bottom plate at the front end of the plough-shaped plate are respectively fixed with a top plate clearing mechanism and a bottom plate clearing mechanism; and the wedge-shaped body is arranged at the front end of the coal mining head. Compared with the prior art, the coal mining method and a coal mining apparatus have the advantages of high production efficiency, low energy loss and high block rate.

Description

technical field [0001] The invention relates to a mining method and equipment for coal, in particular to a mining method and equipment for mining coal by using a wedge. Background technique [0002] At present, the commonly used coal mining methods include mechanical coal mining, or using water and blasting coal mining, among which mechanical coal mining is widely used. Among the above coal mining methods, the efficiency of mechanical coal mining is relatively high. The existing mechanical coal mining equipment is generally a drum shearer and a coal plow. Among them, the drum shearer has high productivity, low lump coal rate, and large dust. The coal plow has a high block rate and less dust, but the production efficiency is low. [0003] Due to the natural conditions for the formation of coal seams, generally the upper part of the coal seam is covered with a rock-soil layer of a certain thickness. Stress, so the coal seam has a large apparent strength and is not easily bro...

AI Technical Summary

Problems solved by technology

This method improves the lump coal rate and production efficiency, but because the holes are prefabricated on the coal seam and then pried out, the cleaning mechanism of the top and bottom plate of the equipment cannot effectively avoid the area where the in-situ stress of the coal seam has not been completely eliminated, and there will still be a large amount of energy. In addition, this method prefabricates the hole first, and then pries it with a wedge-shaped body. The hole making and prying are separated, which makes the coal mining process and the structure of the coal mining equipment complicated, and the structural size of the coal mining equipment increases, which inevitably increases the prefabricated hole When the prefabricated holes are large, there will be ground pressure stress, which will increase the energy loss; at the same time, because the impact of ground pressure stress on coal mining efficiency and effect is not considered, three optimal drilling numbers are recommended, which also increases The energy consumption of coal mining, all the prefabricated holes are mined coal, which reduces the lump content rate and the quality of raw coal

[0006] In summary, the existing coal mining methods and equipment have defects such as low efficiency, high power consumption, and low block rate.

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