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Method for improving compacted yellow clay structure of opencast dump by sandy soil

A soil dump and clay technology, which is applied in land preparation methods, applications, ploughs, etc., can solve problems such as aggravating the difficulty of vegetation reconstruction and poor ventilation, and achieve the effects of improving soil permeability, facilitating growth and development, and having a wide range of sources.

Inactive Publication Date: 2019-05-17
CHNA ENERGY INVESTMENT CORP LTD +3
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Problems solved by technology

In particular, the loess on the surface of the dump site is viscous and poorly ventilated. In addition, the soil is compacted due to mechanical rolling, which makes it more difficult to rebuild vegetation.

Method used

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  • Method for improving compacted yellow clay structure of opencast dump by sandy soil
  • Method for improving compacted yellow clay structure of opencast dump by sandy soil
  • Method for improving compacted yellow clay structure of opencast dump by sandy soil

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Embodiment Construction

[0015] Test materials: The sand and yellow clay for testing come from the Shenyan Xiwan Open-pit Mine in Shenmu County, Yulin City, Shaanxi Province. After passing through a 1mm sieve, the basic physical and chemical properties of the yellow clay are: the content of available phosphorus is 2.72mg / kg, and the content of available potassium is 86.74mg / kg, pH value is 7.55, EC value is 91μs / cm. The clay content of the yellow clay is 85%, the soil compactness of the yellow clay is 3500KPa, and the soil bulk density is 1.8g / cm 3 . The yellow clay is air-dried and finely ground through a 1mm sieve for later use. The sandy soil is aeolian sand, stripped from the surface of yellow clay, and the content of clay grains <0.002mm is no more than 10%. kg, the pH value is 7.48, and the EC value is 52.5 μs / cm. The basin used for the experiment is 20cm (bore diameter)×16cm (bottom diameter)×22cm (height). The tested maize seeds were Pinnuo 28 produced by the Seed Company of the Chinese Ac...

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Abstract

The invention provides a method for improving a compacted yellow clay structure of an opencast dump by sandy soil. The method comprises steps as follows: the sandy soil and yellow clay are mixed uniformly in a weight ratio of 1:1-3:1, and a soil matrix is obtained; the sandy soil is aeolian sand, and content of clay particles with size being 0.002 mm does not exceed 10%; content of the clay particles of the yellow clay is 80%-90%. According to the method, the sandy soil and the yellow clay are compounded in a certain proportion, so that soil permeability of the yellow clay is improved, soil compaction index is reduced, soil structure characters are improved, and growth and development of a root system are promoted.

Description

technical field [0001] The invention belongs to the technical field of soil improvement and relates to the improvement of yellow clay soil. Background technique [0002] The western part of my country is an arid and semi-arid water-deficient area, and the water resource share is only 3.9% of the whole country. Most of the soil fertility is relatively poor, the ecology is fragile, and the output of crops is low. For my country, a large agricultural country, improving the fertility of farmland soil and increasing water use efficiency will be the main problems that need to be solved urgently in the west. [0003] The surface soil of the western open-pit mine dump is barren, and the core soil layer is piled up immaturely, which leads to a series of serious ecological problems such as poor soil structure, reduced fertility and difficult vegetation reconstruction. The key to ecological restoration is to first build a good soil ecological environment, first build a good soil hierar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B7/00A01B79/00
Inventor 全文智雷志勇龚云丽刘慧辉
Owner CHNA ENERGY INVESTMENT CORP LTD
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