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Matrix material and restoration method for ecological restoration of gangue dump of mining area

A technology of ecological restoration and matrix materials, which is applied in the field of ecological restoration projects and the field of matrix materials for ecological restoration of gangue hills in mining areas. It can solve the problems of easy collapse and landslides, damage to limited soil resources, and increased construction costs, and achieve resistance to rainfall erosion and wind erosion. The effect of solving environmental pollution problems and reducing restoration costs

Inactive Publication Date: 2016-10-12
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing ecological restoration of gangue hills in mining areas is mainly covered with foreign soil. The formed soil layer has low nutrient content, poor moisture retention performance, poor soil stability, and it is difficult for plants to be quickly established. It is easy to collapse and landslide under rainfall conditions. The mature soil of the local cultivated land not only caused the destruction of limited soil resources, but also greatly increased the construction cost

Method used

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  • Matrix material and restoration method for ecological restoration of gangue dump of mining area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of matrix raw materials:

[0029] Loam soil: Select the local surface soil, air-dry, crush, and pass through a 5mm sieve. The sand content in the soil is 3%, and the water content is 12%;

[0030] Mineral mixture: apatite, orthoclase, and medical stone are crushed, passed through a 5mm sieve, and the mass ratio of each component is apatite: orthoclase: medical stone = 2:3:1;

[0031] Expanded vermiculite: bulk density about 0.2g / cm 3 , water absorption is about 3 times, and the particle size of vermiculite is less than 3mm;

[0032] The plant fiber is made of corn and wheat straw as the main raw materials. The length after crushing is 3cm, and the ratio of corn and wheat straw is 2:8. The straw mixture is naturally fermented and decomposed for 30 days to form a plant fiber matrix;

[0033] Water retaining agent: the composition is potassium polyacrylate-polyacrylamide copolymer, the absorption rate of 0.9% saline solution is 50-100, the particle size i...

Embodiment 2

[0047] (1) The preparation of matrix raw materials is the same as in Example 1.

[0048] (2) The raw materials of the root induction layer are by mass fraction: loam 30, coal gangue after acidification 40, mineral mixture 10, plant fiber 12, and the rest are the same as in Example 1;

[0049] Mix and stir evenly, spray on the exposed rock surface with a sprayer, with a thickness of 10cm.

[0050] (3) The raw material of seed germination layer is by mass fraction: loam 75, expanded vermiculite 10, all the other are with embodiment 1;

[0051] Mix and stir evenly, and spray it on the surface of the root induction layer by a sprayer, with a thickness of 3cm. The time difference between the seed germination layer and the spraying time of the root induction layer is 18 hours, and finally carry out regular water conservation and management for 3 months.

[0052] After 6 months, the vegetation coverage reached more than 93%, and after 3 years of implementation, the vegetation covera...

Embodiment 3

[0054] (1) Preparation of matrix raw materials: apatite: orthoclase: medical stone = 1.5:2:1; the rest are the same as in Example 1.

[0055] (2) The raw materials of the root induction layer are calculated by mass fraction: 35% of loam soil, 35% of acidified coal gangue, and others are the same as in Example 1.

[0056] Mix and stir evenly, and spray it on the exposed rock surface with a sprayer, with a thickness of 12cm.

[0057] (3) The raw materials of the seed germination layer are calculated by mass fraction: loam 72, expanded vermiculite 13, and others are the same as in Example 1.

[0058] Mix and stir evenly, and spray it on the surface of the root induction layer by a sprayer, with a thickness of 2cm. The time difference between the seed germination layer and the spraying time of the root induction layer is 18 hours, and finally carry out regular water conservation and management for 3 months.

[0059] After 6 months, the vegetation coverage reached more than 92%, a...

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Abstract

The invention provides a matrix material and restoration method for ecological restoration of a gangue dump of a mining area. The matrix material consists of two parts, i.e., a seed germination layer and a root inducing layer and is mainly prepared from loam, acidified coal gangue, inorganic nonmetallic minerals, plant fibers, a water retention agent, an agglomerating agent, a disinfectant, a compound fertilizer, a seed mixture and the like. The matrix material has the characteristics of water retention, fertilizer retention, good stability, erosion resistance, easiness in plant establishment and the like; and by using wastes such as the coal gangue as main matrix materials, the consumption of imported soil can be effectively lowered, the soil environment of abandoned mines is improved, the environmental pollution is reduced, and the ecological restoration cost is reduced.

Description

technical field [0001] The invention relates to an ecological restoration project, in particular to a matrix material for ecological restoration of gangue hills in mining areas and an ecological restoration method. Background technique [0002] Along with coal mining construction, a large number of exposed gangue slopes are formed, which are prone to geological disasters such as landslides, collapses, and debris flows, and ecological governance is urgently needed. There is no soil for the normal growth and development of plants on the surface of the gangue hill slope, and the water and nutrients necessary for the growth and development of vegetation cannot be supplied normally. The key to the ecological restoration of the gangue hill slope is to create soil conditions on the slope surface, which can stably and continuously support plants. Growth provides nutrient and water security. [0003] Existing ecological restoration of gangue hills in mining areas is mainly covered w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02A01G9/10
CPCA01B79/02A01G24/00
Inventor 陈璋王继荣刘勇
Owner SHANXI UNIV
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