Efficient mining method for long-wall type thin coal seam and medium-thickness coal seam

Abstract

The invention discloses an efficient mining method for a long-wall type thin coal seam and a medium-thickness coal seam, and relates to the technical field of coal mining. The method comprises the following steps that a coal mining working face is arranged; coal breaking is carried out through a continuous coal mining machine, wherein a roller of the continuous coal mining machine is lifted, and is cut into a coal body, the roller is from top to bottom until reaching a bottom plate, a top plate and the bottom plate are flat to complete one-knife cutting of coal, then the roller is lifted again, and cutting is circularly and repeatedly carried out cutting until the roller reaches the end part of another roadway to complete one-cycle cutting of the working surface; the coal is loaded by means of the continuous coal mining machine; the coal is conveyed; supporting is carried out, wherein a shield type self-moving hydraulic support is used for working face supporting, and when the shield type self-moving hydraulic support is propelled and moved in the roadway direction, the top plate is supported by two hydraulic supports in one supporting unit, and another hydraulic support descends and moves forward; and a goaf is treated. According to the method, gangue is not cut in the 0.8-1.5 m coal seam, the coal cutting speed reaches 10-20 m / min or above, the requirement for the thickness of the coal seam is met, and efficient mining and high-speed propelling are guaranteed.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a high-efficiency mining method for long-wall thin coal seams and medium-thick coal seams. Background technique [0002] According to the latest edition (2016 edition) of the "Coal Mine Safety Regulations" appendix to the explanation of the main terms, the coal seam with a thickness of less than 1.3m in underground mining is a thin coal seam, and the coal seam with a thickness of 1.3 to 3.5m is a medium-thick coal seam. In the actual coal production process, the thin and medium-thick coal seams of about 0.8-1.5m are limited by the mining space, and it is impossible to arrange high-power fully mechanized mining equipment, resulting in poor mining efficiency and low coal output, which cannot meet the requirements of high production and high efficiency. , and the working space is narrow, seriously affecting the physical and mental health of workers. If the power of fully mechan...

AI Technical Summary

Problems solved by technology

In the actual coal production process, the thin and medium-thick coal seams of about 0.8-1.5m are limited by the mining space, and it is impossible to arrange high-power fully mechanized mining equipment, resulting in poor mining efficiency and low coal output, which cannot meet the requirements of high production and high efficiency. , and the working space is narrow, seriously affecting the physical and mental health of workers

If the power of fully mechanized mining equipment is increased, according to the size of related equipment at home and abroad, if the requirement of not cutting gangue in 0.8-1.5m coal seams is fully met, the installed power of the drum shearer is generally 200-300kW, and the hourly coal-cutting capacity is only 300kW ~400t, unable to achieve good economic benefits

[0003] The drum shearer is limited by the fuselage structure, and it is difficult to realize the coordination and unification of short fuselage and high power, which makes it impossible to achieve high-yield production in 0.8-1.5m coal seams, especially for coal seams below 1.0m. A shearer that can achieve high productivity and high efficiency without cutting the roof or floor

[0004] For another plow mining method suitable for thin and medium-thick coal seam mining, although its minimum mining height can reach below 1.0m, it has high requirements for geological conditions and has not achieved good application results so far.

Images