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Improved substrate for ecological restoration of acid waste rock field in metal mines and its ecological restoration method

An ecological restoration and waste rock field technology, applied in planting substrates, botanical equipment and methods, excavation, etc., can solve the problems of increasing the cost of mine management, loss of cultivated land, huge soil demand, etc., to avoid secondary ecological damage, The effect of improving soil structure and improving construction efficiency

Active Publication Date: 2022-03-04
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the metal mine waste rock field mainly adopts the vegetation restoration method of foreign soil, and the demand for soil is huge; while the mining areas in my country are mostly distributed in deep mountain and rocky areas, especially many mines in the south have no soil to take, and some even purchase cultivated land from other places. , which not only causes the loss of cultivated land, but also greatly increases the cost of mine management

Method used

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  • Improved substrate for ecological restoration of acid waste rock field in metal mines and its ecological restoration method
  • Improved substrate for ecological restoration of acid waste rock field in metal mines and its ecological restoration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] In this embodiment, the ecological restoration of the experimental area A is carried out, and the relevant technical parameters are as follows:

[0078] (1) Slope division: the vertical spacing of ecological rod laying is 1.0m;

[0079] (2) Acidic improvement layer: the dosages of lime, rice husk and organic polymeric binder are 1.0 kg / m 2 、0.5kg / m 2 and 20g / m 2 , the thickness of the acidic modified layer is 1.0cm, and the rest is tailings;

[0080] (3) Improved base material layer: the proportions of tailings and mixed improved materials are 25% and 75% respectively, and the thickness of the improved base material layer is 6.0cm;

[0081] (4) Seed layer: polymer wood fiber 600g / m 2 and plant seeds 25g / m 2 , and its thickness is 0.6cm.

Embodiment 2

[0083] In this embodiment, the ecological restoration of the experimental area B is carried out, and the relevant technical parameters are as follows:

[0084](1) Slope division: the vertical spacing of ecological sticks is 1.0m;

[0085] (2) Acidic improvement layer: the dosages of lime, rice husk and organic polymeric binder are 1.5 kg / m 2 、0.5kg / m 2 and 20g / m 2 , the thickness of the acidic modified layer is 1.5cm, and the rest is tailings;

[0086] (3) Improved base material layer: the proportions of tailings and mixed improved materials are 50% and 50% respectively, and the thickness of the improved base material layer is 8cm;

[0087] (4) Plant seed layer: polymerized wood fiber 800g / m 2 and plant seeds 30g / m 2 , and its thickness is 0.8cm.

Embodiment 3

[0089] In this embodiment, the ecological restoration of the experimental area C is carried out, and the relevant technical parameters are as follows:

[0090] (1) Slope division: The vertical spacing of ecological sticks is 1.5m.

[0091] (2) Acidic improvement layer: the dosages of lime, rice husk and organic polymeric binder are 1.5 kg / m 2 、0.5kg / m 2 and 20g / m 2 , the thickness of the acidic modified layer is 1.5cm, and the rest is tailings;

[0092] (3) Improved base material layer: the proportions of tailings and mixed improved materials are 75% and 25% respectively, and the thickness of the improved base material layer is 8cm;

[0093] (4) Plant seed layer: polymerized wood fiber 1000g / m 2 and plant seeds 35g / m 2 , with a thickness of 1.0 cm.

[0094] The above-mentioned embodiment has been tracked and monitored for 5 consecutive years. In terms of ecological effects, the plant coverage rate has reached 100%, showing a three-dimensional protective structure of tree...

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Abstract

The invention discloses an improved matrix for ecological restoration of acidic waste rock fields in metal mines and an ecological restoration method thereof. The improved matrix is ​​composed of tailings, mixed improved materials, organic polymeric bonding agent and microbial bacterial agent, and the mixed improved materials include Rice husk, chicken manure, fermented sludge and bentonite; the ecological restoration method includes, after pretreatment on the slope, laying ecological sticks, two-way geogrid, acidic improvement layer, chain link fence, improved substrate layer, seed layer and maintenance layer. The improved substrate of the present invention has a wide range of sources and turns waste into treasure, improves the soil structure, has good air permeability and water holding capacity, and can realize the restoration of guest-free soil and vegetation in the acidic waste rock field of metal mines; the ecological restoration method has high construction efficiency, The cost of the ecological restoration project is low, the resource utilization of solid waste is realized, the environmental and social benefits are good, the process is simple, easy to implement, the effect is good, and it is suitable for large-scale application.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and relates to an ecological restoration of an acidic waste rock field in a metal mine, in particular to an improved substrate for the ecological restoration of an acidic waste rock field in a metal mine and an ecological restoration method thereof. Background technique [0002] Metal mines have a large proportion of sulfides in minerals, especially metal deposits such as copper, lead and zinc, accounting for about 75% of the total amount of various minerals. The metal grade is extremely low, and the mineral mining and stripping ratio is high, resulting in a large amount of solid waste; among them, every ton of ore mined produces an average of 1.25 tons of waste rock, and in recent years, about 130-140 million tons of waste rock have to be discharged per year; The average output of 1 ton of ore is about 0.92 tons of tailings, and the tailings will increase by about 110 million tons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/20E02D5/74E02D3/00A01G24/17A01G24/25A01G24/20A01G24/10A01G24/15A01G24/22A01G22/00
CPCE02D17/20E02D17/202E02D5/74E02D3/00E02D3/005A01G24/17A01G24/25A01G24/20A01G24/10A01G24/15A01G24/22A01G22/00
Inventor 王琼孙伟李昊杨越晴
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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