Technology and equipment for separating coal and gangue and refilling gangue

Abstract

Disclosed in the present invention are a method and an equipment for separating coal and gangue and refilling gangue. The method comprises the following steps: cutting an upper coal layer by a coal mining machine (5) and conveying the coal to a well by a scraper conveyor (1), a transfer conveyor (2) and a belt conveyor; cutting a middle gangue layer by the coal mining machine (5) and reversely running the scraper conveyor (1) to convey the gangue to a gangue back-conveying transfer conveyor (3), conveying the gangue by the gangue back-conveying transfer conveyor to a gangue throwing scraper conveyor (4) which is suspended on the rear part of a hydraulic bracket (6) and provided with an open middle slot plate and throwing the gangue into a gob; and cutting a lower coal layer by using the coal mining machine and conveying the coal to the well by using the scraper conveyor (1), the transfer conveyor (2) and the belt conveyor. The method can realize the separation of coal and the gangue, and the gangue is refilled into the gob, so that mixed mining and conveying for the coal and the gangue are avoided, the cost is saved and the environment is protected.

Description

technical field [0001] The invention relates to a technical equipment for separating coal and gangue when a shearer cuts coal, and backfilling the gangue into a goaf. Background technique [0002] Coal is a major energy source and plays a pivotal role in the national economy. Over the past 60 years, China's coal industry has made important contributions to the development of the national economy. Coal accounts for about 76% and 69% of my country's primary energy production and consumption structure respectively, which strongly supports the development of the national economy and society. Coal provides 78% of power generation energy; secondly, coal is one of the main chemical raw materials in China, providing 70% of chemical raw materials; thirdly, coal is an important material for agricultural production and urban people's life, and 60% of civilian commercial energy is Provided by coal. In the proven energy, coal accounted for 94.3%. In the next 50 to 60 years, with the ...

AI Technical Summary

Problems solved by technology

[0003] my country is the largest coal-producing country in the world, and 25% of the coal seam contains gangue. Because the gangue is sandwiched in the middle of the coal seam, the traditional coal mining process can only extract coal and gangue together. As a result, the coal is mixed with gangue. A large amount of gangue, resulting in a significant decline in coal quality

At the same time, a large amount of gangue is transported from underground to the ground, which also wastes a lot of manpower and material resources.

In addition, after a large amount of gangue is trampled out, it not only enlarges the goaf space, but also intensifies the subsidence of the ground surface. Moreover, the gangue is mined and stored on the ground and occupies a large amount of land. After a long storage time, the sulfur in the gangue burns and produces a large amount of sulfur dioxide, which seriously pollutes the environment.

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