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Artificial soil and method for land reclamation by aid of gold mine tailing slag backfill exploitation regions

An artificial soil and land reclamation technology, applied in the field of soil preparation methods, botanical equipment and methods, applications, etc., can solve problems affecting residents' lives, infiltration into the ground, air pollution, etc., and achieve excellent water and fertilizer retention performance, soil Effect of increased air permeability and increased organic matter content

Inactive Publication Date: 2019-03-08
杰瑞(莱州)矿山治理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main problems of tailings stockpiles are: on the one hand, a large number of tailings wastes occupy a large amount of land resources, reduce the farming and forestry land of the people, and affect the lives of local residents; on the other hand, some tailings contain heavy metal ions or other toxic substances. Harmful ions flow downstream with water or seep into the ground, causing environmental pollution; moreover, the tailings waste area is also a huge source of sand and dust, which brings serious environmental pollution to the surrounding air
For example, Baotou Steel and Anshan tailings pond tailings waste residue, high salinity, plants cannot survive, ecological restoration is difficult to succeed, bringing huge burdens to the local economy and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, the experimental area is 100 square meters, the thickness of the artificial soil is 50cm, 40% of tailings waste residue, 25% of acidic loam, 20% of organic decomposed matter, 10% of kaolin, 2% of organic fertilizer, 1% of micro-fertilizer, soil Blending agent 0.5%, positive polyacrylamide 0.5%, autogenous nitrogen-fixing bacteria 0.25%-1%, legume 0.75%; the stomatal conductance of the manufactured artificial soil is 47%, the pH is 6.3, and the bulk density is 0.70g / cm 3 , the organic matter content is 4.3%, the total nitrogen is 0.26%, the available nitrogen is 0.02%, the available potassium is 0.027%, and the available phosphorus is 0.005%. The leguminous plant alfalfa is sown in the artificial soil, the depth is 1cm, normal maintenance, and the alfalfa is counted after 60 days The growth status: the height is 17cm, the root length is 12cm, the density per square meter is 175 plants, the coverage rate is 92%, and the exposed rate of tailings waste is less ...

Embodiment 2

[0022] Embodiment 2, the experimental area is 100 square meters, the thickness of the artificial soil is 80cm, tailings waste slag 55%, acid loam 15%, organic decomposed matter 17%, kaolin 2%, organic fertilizer 3%, micro-fertilizer 2%, soil Blending agent 1%, positive polyacrylamide 2%, autogenous nitrogen-fixing bacteria 1%, leguminous plants 2%; stomatal conductance of artificial soil is 43%, pH is 5.7, bulk density is 0.79g / cm 3 , the organic matter content is 4.9%, the total nitrogen is 0.32%, the available nitrogen is 0.029%, the available potassium is 0.04%, and the available phosphorus is 0.0059%. The leguminous plants Robinia pseudoacacia and Amorpha fruticosa are sown in the artificial soil at a depth of 2cm. After normal maintenance, after 60 days Count the growth status of Robinia pseudoacacia and Amorpha fruticosa, wherein the average height of Robinia pseudoacacia is 25cm, the length of root system is 19cm, the average height of Amorpha fruticacia is 15cm, the len...

Embodiment 3

[0023] Embodiment 3, the experimental area is 100 square meters, the thickness of the artificial soil is 65cm, tailings waste slag 49%, acid loam 20.5%, organic decomposed matter 18%, kaolin 6%, organic fertilizer 2.5%, micro-fertilizer 1.5%, soil Blending agent 0.2%, positive polyacrylamide 0.75%, autogenous nitrogen-fixing bacteria 0.05%, leguminous plants 1.5%; stomatal conductance of artificial soil is 44%, pH is 6.9, bulk density is 0.74g / cm 3 , the organic matter content is 4.5%, the total nitrogen is 0.3%, the available nitrogen is 0.022%, the available potassium is 0.03%, and the available phosphorus is more than 0.0053%. Sow the leguminous plant Albizia juliensis in the artificial soil, the depth is 3cm, normal maintenance, after 60 days, count the albizia juniper Growth status: The height is 22cm, the root length is 17cm, the density per square meter is 99 plants, the coverage rate is 89%, and the exposed rate of tailings waste is less than 11%. Exposure rate increas...

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Abstract

The invention provides artificial soil and a method for land reclamation by the aid of gold mine tailing slag backfill exploitation regions. The method includes carrying out filling and compaction onthe tailing waste slag backfill exploitation regions; uniformly mixing various components of the optimally designed artificial soil with one another and ultimately covering tailing waste slag backfillsurfaces with the novel artificial soil with a certain thickness so as to effectively treat mine tailing. The artificial soil and the method have the advantages that the prepared artificial soil contains abundant nutrient components, the contents of organic matters can be increased, the gas permeability of the soil can be improved, and the artificial soil is excellent in water retention capacityand fertilizer preservation capability and suitable for growth of plants; organic thoroughly decomposed substances come from agricultural and forestry waste, are extensive in source and are easily available, accordingly, solid waste can be comprehensively utilized in a 'reduction, resource utilization and harmlessness' manner, and the artificial soil and the method conform to principles of circular economy; the land occupation problems of tailing ponds and the problems in the aspect of tasks of land reclamation of mined-out regions can be simultaneously solved by the aid of the artificial soiland the method, and the artificial soil and the method have large market spaces.

Description

technical field [0001] The invention relates to the technical field of mine treatment, in particular to an artificial soil and a reclamation method for land reclamation using gold ore tailings to backfill mining areas. Background technique [0002] With the rapid development of my country's economy and the rapid development of infrastructure, more and more stone ores are mined and used in all walks of life and production. Among them, the raw ore enters the concentrator after crushing, grinding and sorting operations, forming a large number of tailings; as of 2010, the total amount of tailings accumulated in the country was 11.00 billion tons, or about 7.33 billion cubic meters, and it increased by hundreds of millions of tons every year; at present, tailings have become the largest output and comprehensive utilization in my country's industrial production. The lowest rate of bulk solid waste. [0003] The main problems of tailings stockpiles are: on the one hand, a large numb...

Claims

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Application Information

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IPC IPC(8): A01B79/02A01G24/10A01G24/20A01G24/30A01G24/22E21F15/00E21C41/32
CPCA01B79/02A01G24/10A01G24/20A01G24/22A01G24/30E21C41/32E21F15/00
Inventor 任广滨杨建国刘璠张志毅
Owner 杰瑞(莱州)矿山治理有限公司
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