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Coal mining subsidence area filling reclamation method based on coal gangue

A coal mining subsidence area, coal gangue technology, applied in the direction of land preparation methods, applications, agricultural machinery and tools, etc., can solve the problems that do not take into account the influence of soil cultivation properties such as soil water retention, fertility and air permeability, etc., to achieve physiological Good ecological characteristics, good water and fertilizer retention and air permeability, good for growth

Inactive Publication Date: 2015-12-23
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology does not take into account the impact of different particle sizes of coal gangue filling matrix on soil cultivation properties such as water retention, fertility and air permeability of the reclaimed soil.

Method used

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  • Coal mining subsidence area filling reclamation method based on coal gangue
  • Coal mining subsidence area filling reclamation method based on coal gangue
  • Coal mining subsidence area filling reclamation method based on coal gangue

Examples

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Effect test

Embodiment 1

[0018] 1. Test method

[0019] In this example, Huainan Chuangda’s “Coal Gangue Filling and Reclamation Demonstration Base” is used as the experimental area, and the physical and chemical properties of the soil and the changes in the physiological and ecological indicators of corn in the experimental area are used to explore the impact of different particle sizes of coal gangue as a filling matrix. Experimental area reconstruction of soil physical and chemical properties and its influence on the physiological and ecological characteristics of maize. The experimental area is located in the Panji mining area of ​​Huainan City, with a total area of ​​2000m 2 , of which 300m 2 As a filling reclamation test area under the condition of "unsorted coal gangue filling with different soil thicknesses", the average separation is 10×10m 2 The test field is marked as No. Ⅰ, Ⅱ, and Ⅲ according to the thickness of the overlying topsoil of 70cm, 50cm and 30cm; 900m 2 As the filling and rec...

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Abstract

The invention discloses a coal mining subsidence area filling reclamation method based on coal gangue. According to the method, the coal gangue is taken as a filling substrate to fill a coal mining subsidence area, and then the filling substrate is covered with soil, wherein the coal gangue with the particle size smaller than 80 mm accounts for more than 40% of the filling substrate. The coal mining subsidence area filling reclamation method based on the coal gangue utilizes the coal gangue with different particle size ratios as the filling substrate, so that the filling substrate has better water and fertilizer retention capability and air permeability than the coal gangue in a natural state, especially the coal gangue containing 70%-95% of the coal gangue with the particle size smaller than 80 mm accounting for 70%-95% is taken as the filling substrate, accordingly, physio-ecological characteristics of crops cultivated by reconstructed soil are good, and the reconstructed soil obtained with the filling method is more favorable for growth of the crops.

Description

technical field [0001] The invention relates to a method for filling and reclamation of a coal mining subsidence area, in particular to a method for filling and reclamation of a coal mining subsidence area based on coal gangue. Background technique [0002] my country is a country with a large coal industry, and the large-scale mining and utilization of coal resources has caused a large loss of land resources. In recent years, the use of coal mine waste such as coal gangue to fill and reclaim coal mining subsidence areas can alleviate the environmental problems of a large amount of coal mine waste accumulation and land occupation, and is an effective way to restore cultivated land in mining areas. However, the prior art does not take into account the influence of different particle sizes of coal gangue filling matrix on soil cultivation properties such as water and fertilizer retention and air permeability of the reclaimed soil. Contents of the invention [0003] The purp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00
Inventor 徐良骥黄璨朱小美李青青宫传刚严家平
Owner ANHUI UNIV OF SCI & TECH
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