Composite improved matrix used for restoring ecology of gangue storage yard

Abstract

The invention relates to a composite improved matrix used for restoring ecology of a gangue storage yard, and concretely relates to a composite improved matrix material used for restoring ecology of the gangue storage yard, which belongs to the mining wasteland ecological restoration technical field. The composite improved matrix solves the problems of high extra soil cost, severe site conditions, difficult viability of plants, easy failure by using a conventional alkali neutralization method and fertilizing treatment, easy generation of severe environmental influence and ecological harm due to large stacking of industrial and agricultural solid wastes of gangue, residual sludge, fly ash, phosphogypsum, culture manure and the like. The composite improved matrix is composed of residual sludge, fly ash, phosphogypsum, culture manure, soil and mushroom dreg, and moss according to a certain proportion. The composite improved matrix has the advantages of simple production, wide raw material source and good resource effect of refuse, and has good environmental benefit, economic benefit and social benefit.

Description

technical field [0001] The invention relates to a composite improved matrix for ecological restoration of coal gangue storage yards, in particular to a composite improved matrix material for ecological restoration of coal gangue storage yards, and belongs to the technical field of ecological restoration of mine wastelands. Background technique [0002] China is the largest country in the world that uses coal as its main energy source. It is a basic feature of China's energy resources to have more coal and less oil. Coal mining is accompanied by a large amount of coal gangue. Generally, every 1 ton of coal mined is accompanied by about 10%-30% of coal gangue. Coal gangue has become one of the largest industrial wastes in my country. Limited to the current technical and economic level of our country, the utilization of coal gangue is mainly through backfilling, brick making, roadbed, etc., and the comprehensive utilization is less than 30%. At the same time, coal gangue is oft...

AI Technical Summary

Problems solved by technology

Limited to the current technical and economic level of our country, the utilization of coal gangue is mainly through backfilling, brick making, roadbed, etc., and the comprehensive utilization is less than 30%. At the same time, coal gangue is often rich in sulfur, iron, manganese, copper, zinc, arsenic, and mercury. Under the open-air stacking conditions, coal gangue and other associated minerals are prone to produce acidic mine wastewater, toxic gas, dust and other pollutants due to wind, moisture, oxygen and microbial action, which seriously pollute natural environments and ecosystems such as water bodies, soil and the atmosphere. Therefore, it is particularly important to carry out ecological restoration of coal gangue storage yards.

The ecological restoration of coal gangue storage yards generally has severe site conditions such as extreme lack of plant nutrition, high temperature, water shortage, acid damage, salt damage, and heavy metal stress, which make it difficult for vegetation to survive; the cost of guest soil is high, especially in the southwest karst area. It is more obvious; at the same time, the traditional alkali neutralization method and fertilization treatment are prone to failure; in addition, a large amount of industrial and agricultural solid waste such as surplus sludge, fly ash, phosphogypsum, and breeding manure are piled up in large quantities, which will also cause serious environmental problems and ecological hazards