Method for treating coal gangue heaps

Abstract

The invention discloses a method for treating coal gangue heaps. The method for treating the coal gangue heaps includes the following steps that S1, a coal mine goaf stability zone is selected as a coal gangue treatment site; S2, 0.5 m-1.0 m of surface soil is stripped to be stacked near a goaf; S3, concrete is sprayed on the pit bottom and side of the goaf, shotcrete adopts P.C42.5 grade composite cement, and the quality ratio is 18%-25%; sand adopts medium sand, and the quality ratio is 30%-55%; gravel is hard and durable, the maximum particle size is less than 10 mm, and the quality ratio is 30%-45%; and S4, coal gangue is placed in the treated goaf, and the coal gangue backfill reaches 1.5m-1m below the ground treatment elevation. The method for treating the coal gangue heaps can solvethe problem that a large amount of coal gangue accumulates and occupies land to lead geological disasters; the coal gangue can be effectively avoided to pollute soil, the governance time is short, and the cost is low; and the method for treating the coal gangue heaps is suitable for popularization and application in the coal mine goaf, at the same time, coal gangue transportation is avoided, a lot of costs are saved, and at the same time, the spontaneous combustion of the coal gangue is avoided.

Description

technical field [0001] The invention relates to the technical field of coal mine geological environment control and land reclamation, in particular to a method for processing coal gangue piles. Background technique [0002] In the process of coal mining, when coal is developed, a large amount of coal gangue is incidentally produced, and it also leads to the collapse of the coal mining area, causing serious geological disasters. First of all, coal gangue is piled on the surface of the industrial plaza, occupying a large area of ​​land, which will not only generate dust, but also cause spontaneous combustion, seriously affecting the safety of the industrial plaza. Secondly, coal mining will lead to ground subsidence, which has brought great harm to the local government and nearby residents. In view of such defects, it is necessary for us to design a method for dealing with coal gangue piles. Contents of the invention [0003] The purpose of the present invention is to provi...

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Problems solved by technology

[0003] The object of the present invention is to provide a method for processing coal gangue piles, which can solve the problems of a large amount of coal gangue accumulating land and causing geological disasters; can effectively avoid coal gangue polluting the soil, and has short treatment time and low cost; suitable for use in coal mines Promote the application of gobs, while avoiding the transportation of coal gangue, saving a lot of costs, and avoiding the spontaneous combustion of coal gangue

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