Ecological restoration method for quarry in mining area

A technology of ecological restoration and quarry, applied in the direction of soil preparation methods, applications, agricultural machinery and tools, etc., can solve the problems of organic matter decomposition and nitrogen mineralization process inhibition in mining areas, biodiversity attenuation, guest soil is easy to be polluted, etc. To achieve the effect of avoiding the erosion of guest soil, increasing the diversity of mining areas, and weakening the toxicity of mining areas

Active Publication Date: 2019-08-16
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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  • Ecological restoration method for quarry in mining area

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 an ecological restoration method for a quarry in a mining area, and belongs to the field of ecological restoration. The ecological restoration method for the quarry in the mining area comprises the following steps: leveling the quarry, crushing waste ores to obtain ore powder, and soaking the obtained ore powder with an aqueous solution containing sulfuric acid to obtain pretreated ore powder; adding water and an agglomerating agent into the pretreated ore powder, and shearing to obtain a slurry; laying an activated carbon layer, the slurry and an isolation layer composed of coal gangue and fly ash in the leveled quarry in sequence, and compacting while spraying water; and then carrying out operations such as borrowed soil backfilling, crop planting and the like. Themethod is a systematic and targeted restoration method, multiple measures are simultaneously taken, effects of recycling, restoring, weakening the toxicity of the mining area, enriching the nutritionof the mining area, increasing the diversity of objects in the mining area and the like are integrated, the abandoned mining area is converted into a usable area after long-term restoration, the added borrowed soil is prevented from being eroded, and normal growth of planted crops is guaranteed.

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 Applications(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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