Coal mining technical method for filling gangue by using ground directional drilling

Abstract

The invention discloses a coal mining technical method for filling gangue by using ground directional drilling. The method comprises the following steps: crushing gangue after ore separation, feeding into a ball mill, rolling into gangue powder, and according to the design, geology and mining technical conditions of a coal mining working face and the like, utilizing a conveying system consisting of a grouting pump, an air pump and the like, taking L-shaped ground drilling holes and the like as channels, and filling the processed gangue into a 'separation layer' and a goaf so as to achieve the purposes of filling while mining and zero emission of the gangue and a technical method for green mining. The gangue is utilized, so that zero emission of solid waste of a mine can be realized, and the working and living environments of a mining area are effectively improved; the goaf is filled with the gangue, the strength of the mining area is improved, risks such as collapse are reduced, and safe and efficient mining is facilitated; and the gangue is filled into the separation layer, so that ground subsidence reduction can be realized, and the goal of 'three-under mining' is achieved.

Description

technical field [0001] The invention relates to the field of coal mining and processing, in particular to a technical method for gangue filling mining by using directional drilling on the ground. 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 the primary energy production and consumption structure in my country, 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 commodity energy is Provided by coal. Coal accounts for 94.3% of the proven energy. In the next 50 to 6...

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 technology 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.