Closed isolation composition applied to treatment of gangue hill and implementation method thereof

Abstract

The invention provides a closed isolation composition applied to the treatment of a gangue hill and an implementation method thereof, and belongs to the technical field of environmental treatment andmine ecological restoration. The closed isolation composition comprises inorganic substances, a polymer, fiber, an additive and water, the weight ratio of the inorganic substances is 20-75%, the weight ratio of the polymer is 0.2-5%, the weight ratio of the fiber is 0.05-5%, the weight ratio of the additive is 0.05-2%, and the weight ratio of the water is 20-75%; the above materials are mixed according to a certain ratio to prepare a mixed slurry, the slurry is sprayed on the surface of the gangue hill for sealing of the gangue hill and isolation from a vegetation area to completely eliminatethe hazard of the gangue hill, and the disturbance influence of vegetation on the gangue hill is eliminated. The closed isolation layer has the advantages of airtightness, seepage resistance, heat insulation, firmness and durability, the used materials are all environmentally friendly, the construction is simple, the efficiency is high, and the cost is low.

Description

technical field [0001] The invention belongs to the technical fields of environmental management and mine ecological restoration, and in particular relates to a sealing and isolation composition applied to gangue hill management and an implementation method thereof. Background technique [0002] Coal gangue is one of the largest industrial solid wastes in China, with an annual output of hundreds of millions of tons. Due to the limitations of existing technical means, the current resource utilization rate is very low. Most of the waste coal gangue is piled on the ground to form Gangue hills. At present, more than 5 billion tons have been piled up, and the annual increase is hundreds of millions of tons. In Shanxi alone, there are thousands of waste rock dumps, and the largest pile of waste rock piles reaches tens of millions of tons. Because coal gangue contains sulfide, it is very easy to oxidize and spontaneously ignite, producing a large amount of toxic and harmful gases,...

AI Technical Summary

Problems solved by technology

[0004] One is that the problem of spontaneous combustion of gangue has not been solved, leading to the death of vegetation, and smoke, toxic gas H 2 S, SO 2 , CO enters the atmosphere in a large amount, and the treatment fails, which not only costs a lot of money, but also causes huge damage to the environment. Judging from the status quo of gangue hills in areas A, B, and demonstration areas of Guandi Mine of Xishan Coal and Electricity Group, the problem is quite serious. Although many remedial measures have been taken, such as grouting, colloid injection and other fire extinguishing measures, the fundamental problem has not been solved. question

[0005] The second is that although there is no spontaneous combustion, the vegetation is growing, especially when it is flourishing, because the roots of the vegetation grow to or close to the gangue area, and the high temperature in the gangue area leads to the death of the vegetation.

[0006] The third is that the existing technology does not really solve the problem of gangue sealing and isolation, let alone solve the problem of seeping gangue area under rainwater

[0016] 2. The above isolation materials have poor water resistance and cannot prevent rainwater from seeping down

But the reality is that the vegetation growth area not only cannot prevent rainwater from infiltrating, but the vegetation needs water and the soil has air permeability, otherwise, the vegetation cannot survive

Therefore, the vegetation growth area cannot not only play the role of "isolation" but also play the role of vegetation growth. It is not feasible in theory, and it has caused serious consequences in practice.

This approach to governance costs a lot of money