Overlying Rock Isolation Grouting Filling Method for Coal Gangue Underground Emission Reduction

Abstract

The invention relates to an isolation grouting filling method for overlying rocks for coal gangue emission reduction underground, and is applicable to the field of coal mining gangue emission reduction. According to the information of the coal mining face, determine the key layer of grouting filling, from the construction of directional drilling in the underground roadway to the inside of the key layer of grouting filling, and construct multiple branch holes downward in the main hole of the directional drilling; through the establishment of grouting in the underground The filling system is to crush and grind the mine excavation gangue and selected gangue to make filling slurry, and use directional drilling to fill the cracks below the key layer, effectively support the key layer, and control the movement of the rock layer and surface subsidence. In the method, the coal gangue produced in the mine is directly made into filling slurry underground, and then filled into the mining cracks of overburden rock, so as to realize harmless disposal.

Description

technical field [0001] The invention relates to a coal mine gangue underground emission reduction method, which is particularly suitable for a method for overlying rock isolation grouting and filling for coal mine gangue underground emission reduction. Background technique [0002] Coal gangue is an important part of coal-based bulk solid waste. It has the characteristics of large amount and wide area. Traditional ground stacking has led to a series of problems such as land occupation and pollution, which has a serious impact on the environment of mining areas. The harmless disposal of coal gangue has become a key issue related to the sustainable development of mining areas. After the coal gangue is made into a suitable slurry, it can be filled into the mining fissures of the overlying rock by using the grouting filling technology, which can not only achieve the purpose of reducing gangue emission, but also achieve multiple purposes such as rock formation control and surface...

AI Technical Summary

Problems solved by technology

[0003] Patent ZL2012101649299 discloses the "Coal Mining Method for Mining Overlying Rock Partition Isolation and Grouting Filling", which is to inject grout into the mining cracks in the overlying rock layer above the coal seam through ground drilling, so as to realize waste disposal, support the key layer of overlying rock, and prevent The purpose of ground subsidence; the grouting filling disclosed by this method is implemented through the ground drilling and filling system, and the source of coal gangue discharge is formed during underground excavation and coal mining. Using this method, the gangue must be lifted to Grouting filling treatment on the ground cannot achieve the purpose of processing coal gangue from the source; and the grouting drilling construction of this method needs to occupy a certain construction site, which is affected by ground buildings and structures, and the location of the grouting drilling Often can not be set in the ideal position, or even construction drilling

In summary, the existing overlying rock isolation grouting filling technology can not be applied to the underground treatment of mine coal gangue. Therefore, there is an urgent need for a new overlying rock isolation grouting filling method for coal gangue underground emission reduction to realize mine The purpose of in-situ harmless treatment of coal gangue underground during the mining process

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