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Strip mine area topsoil reconstruction mode and application

A technology for topsoil and mining areas, applied in application, planting substrates, agricultural machinery and tools, etc., can solve the problems of poor water holding capacity of topsoil, achieve the effects of accelerating vegetation recovery, low transportation costs, and reducing deep water leakage

Active Publication Date: 2022-06-24
陕西省生物农业研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing technology uses sandstone as the anti-seepage layer to reduce the deep infiltration of water, but the water holding capacity of the surface soil is still poor. In the initial stage of vegetation restoration, the water in the deeper layer is difficult to be absorbed and utilized by plants.

Method used

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  • Strip mine area topsoil reconstruction mode and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The collected arsenic sandstone was air-dried, pulverized and passed through a 2 mm sieve, and then the bulk density was 1.40 g / cm. 3 , filling the pi sandstone into 100 cm 3 The ring knife is used to measure field water holding capacity, saturated water content and saturated hydraulic conductivity.

Embodiment 2

[0031] The collected sandy loess, aeolian sandy soil and arsenic sandstone were air-dried, crushed and passed through a 2 mm sieve. figure 1 In the middle 2 treatment method, the three materials were packed into a transparent glass soil column (100 cm high, 25.5 cm inner diameter), and the packing density was 1.50 g / cm 3 (Sand loess), 1.40 g / cm 3 (Pi sandstone), 1.60 g / cm 3 (wind sand) and 1.65 g / cm 3 (Compacted pi sandstone), placed the soil column under the canopy, irrigated the soil column with 40 cm of water, and measured the evaporation and water storage capacity of the soil by weighing method from June to August 2019.

Embodiment 3

[0035] The collected sandy loess, aeolian sandy soil and arsenic sandstone were air-dried, crushed and passed through a 2 mm sieve. figure 1 In the middle 2 treatment, the three materials were packed into a black PVC soil column (height 110 cm, inner diameter 28.3 cm), and the packing density was 1.50 g / cm 3 (Sand loess), 1.40 g / cm 3 (Pi sandstone), 1.60 g / cm 3 (wind sand) and 1.65 g / cm 3 (compact arsenic sandstone), place the soil column under the canopy, and plant alfalfa in the soil column from July to November 2019, and mow the alfalfa in September, October and November, respectively, and then dry it. Weighing, after the last mowing, the soil column is cut open, the root system is washed, dried and weighed.

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Abstract

The invention discloses a strip mine area topsoil reconstruction mode and application, and the strip mine area topsoil reconstruction mode combines local natural materials of sandy loess, aeolian sandy soil and arsenic sandstone in Shanxi, Shaanxi and Mongolia strip mine areas to construct a layered soil body according to the national land reclamation technology standard. The reconstructed soil body with the soft sandstone interlayer thickness of 20 cm is screened out by comparing the soil moisture of the reconstructed soil body with different soft sandstone interlayer thicknesses and the alfalfa growth condition through an indoor test, a soil column test and a field test, the water storage capacity of the soil body is increased, plant growth is promoted, and the reconstructed soil body can serve as an optimal mode for reconstructing the surface soil body of the mining area in the area. According to the reconstruction mode, the water retention effect of the soil body is remarkably improved, water evaporation of the soil body is reduced, the problems of deep seepage of water of the coarse soil in the mining area and water shortage of a plough layer are effectively solved, rainfall is intercepted to the maximum extent, vegetation growth is promoted, vegetation recovery of the area is facilitated, local materials are used, cost is low, practicability is high, and the method is suitable for popularization.

Description

technical field [0001] The invention belongs to the technical field of land reclamation, and in particular relates to a surface soil reconstruction mode and application in an open-pit mining area. Background technique [0002] The mining of open-pit coal mines in the Shanxi-Shaanxi-Mongolia energy area has brought serious ecological and environmental problems, such as complete destruction of surface vegetation, permanent changes in surface topography, reconstruction of surface and deep soil bodies, and serious systematic damage to surface and underground hydrological systems. The dumps formed by the accumulation of exfoliated materials in the open-pit mining area are the main landform forms after mining. Under the action of strong winds and heavy rains, soil erosion is prone to occur, which aggravates the already fragile ecological environment. Land reclamation is the primary task of vegetation restoration in mining areas, and the reconstruction of topsoil determines the suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02A01G24/46
CPCA01B79/02A01G24/46
Inventor 贾俊超张兴昌李朝栋李文孝梁建强常长越卢雨欣
Owner 陕西省生物农业研究所
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