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A method for ecological restoration of quarries in mining areas

A technology of ecological restoration and quarry, applied in the direction of land preparation, agriculture, application, etc., can solve problems such as erosion, biodiversity attenuation, and affecting vegetation growth, and achieve the goal of improving the ecological environment, changing the aggregate structure, and stabilizing the greening effect Effect

Active Publication Date: 2021-11-30
NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For these reasons, the backfilled foreign soil is easily polluted (and exhibits periodic erosion), which further leads to the inhibition of organic matter decomposition and nitrogen mineralization in the mining area, resulting in the decline of biodiversity and seriously affecting the growth of vegetation.

Method used

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  • A method for ecological restoration of quarries in mining areas
  • A method for ecological restoration of quarries in mining areas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Level the quarry, and crush the abandoned ore to obtain mineral powder, and soak the obtained mineral powder in an aqueous solution of sulfuric acid with a concentration of 12% (the mass ratio of mineral powder is 1:2) for 30 hours, Obtain pretreated mineral powder;

[0057] Mix the pretreated mineral powder, water, and agglomerating agent in a mass ratio of 10:8:5, and then shear at a speed of 12,000 rpm for 1 hour to obtain a slurry; the agglomerating agent is alkali A mixed solution of formula aluminum chloride and polyferric sulfate;

[0058] After laying activated carbon layer, slurry and isolation layer composed of coal gangue and fly ash in the quarry after leveling, compaction is carried out while spraying water. The thickness ratio of activated carbon layer, slurry and isolation layer is is 1:2:1; wherein, in the isolation layer, the mass ratio of coal gangue and fly ash is 5:1;

[0059] Arbor tree trunk (length is 0.5-1 meter) is laid in the quarry after com...

Embodiment 2

[0063] The quarry is leveled, and the waste ore is crushed, and the obtained ore powder is soaked in an aqueous solution of sulfuric acid with a concentration of 20% (the mass ratio of the ore powder is 1:1.5) for 50 hours to obtain a pretreated ore pink;

[0064] After mixing the pretreated mineral powder, water, and agglomerating agent in a mass ratio of 5:5:4, shear at a speed of 15,000 rpm for 1 hour to obtain a slurry; in weight percentage, The agglomerating agent includes: 15% of basic aluminum chloride, 8% of polyferric sulfate, 20% of zinc chloride, 15% of active silicon dioxide, 10% of sodium carbonate and the balance of water.

[0065] After laying activated carbon layer, slurry and isolation layer composed of coal gangue and fly ash in the quarry after leveling, compaction is carried out while spraying water. The thickness ratio of activated carbon layer, slurry and isolation layer is is 1:3:0.5; wherein, in the isolation layer, the mass ratio of coal gangue and fl...

Embodiment 3

[0071] The quarry is leveled, and the waste ore is crushed, and the obtained ore powder is soaked in an aqueous solution of sulfuric acid with a concentration of 40% (the mass ratio of the ore powder is 1:1.5) for 50 hours to obtain a pretreated ore pink;

[0072] After mixing the pretreated mineral powder, water, and agglomerating agent in a mass ratio of 10:9:7, shear at a speed of 15,000 rpm for 1 hour to obtain a slurry; in weight percentage, The agglomerating agent includes: 10% of basic aluminum chloride, 10% of polyferric sulfate, 15% of zinc chloride, 15% of active silicon dioxide, 10% of sodium carbonate and the rest of water.

[0073] After laying activated carbon layer, slurry and isolation layer composed of coal gangue and fly ash in the quarry after leveling, compaction is carried out while spraying water. The thickness ratio of activated carbon layer, slurry and isolation layer is is 1:2:0.5; wherein, in the isolation layer, the mass ratio of coal gangue and fly...

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Abstract

The invention provides a method for ecological restoration of a quarry in a mining area, which belongs to the field of ecological restoration. In the method, the quarry is leveled, and the discarded ore is crushed to obtain mineral powder, and the obtained mineral powder is used The aqueous solution is soaked to obtain pretreated mineral powder; water and agglomerating agent are added to the pretreated mineral powder and then sheared to obtain a slurry; the activated carbon layer, slurry and After the isolation layer composed of coal gangue and fly ash, compaction is carried out while spraying water; followed by operations such as backfilling with foreign soil and planting crops. This method is a systematic and targeted restoration method, using multiple measures at the same time. It integrates the effects of reuse, restoration, weakening the toxicity of the mining area, enriching the nutrition of the mining area, and increasing the diversity of the mining area. The abandoned mining area can be converted into a usable land, and the erosion of the added guest soil can be avoided to ensure the normal growth of the planted crops.

Description

technical field [0001] The invention relates to the field of ecological restoration, in particular to a method for ecological restoration of a quarry in a mining area. Background technique [0002] my country is rich in mineral resources, and there are more than 100 kinds of minerals that have been proven so far, of which nearly 20 kinds of metal minerals have the highest reserves in the world. With the development of national economic construction and mining technology, the amount of mining is still increasing. [0003] Mineral resources and their development and utilization provide human beings with various materials and energy, but they also destroy land resources and pollute the environment. Especially in some industrial and mining areas of our country, due to the failure to consider the protection of land resources and the maintenance of ecological balance in the development of mineral resources, the land ecosystem has been severely damaged, which has greatly affected ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01B79/02
CPCA01B79/02
Inventor 冯起刘蔚郭瑞贾冰陈丽娟郭小燕杨林山
Owner NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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