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Reclamation and improvement method for waste coal gangue stacking area

A technology for stacking sites and coal gangue, which is applied in the field of reclamation and improvement, can solve problems such as soil pollution, and achieve the effect of promoting crop growth, high application value, and broad market prospects

Inactive Publication Date: 2018-03-02
INST OF AGRI ENVIRONMENT & RESOURCE SHANXI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a reclamation and improvement method for waste coal gangue stacking sites, so as to solve the soil pollution caused by coal gangue stacking and turn waste land into arable land

Method used

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  • Reclamation and improvement method for waste coal gangue stacking area
  • Reclamation and improvement method for waste coal gangue stacking area
  • Reclamation and improvement method for waste coal gangue stacking area

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The test site was selected as a coal mine gangue dump in Gujiao City, Shanxi Province. Since the gangue discharged during the coal mining process needs to be temporarily stacked, the mine built the dump in 2007, and it was abandoned in 2012. After the abandonment, it was not reclaimed and utilized. The stacking yard is in a relatively flat ditch, in an irregular rectangular shape, with a total area of ​​6745m2 2 . The local area is a hilly area of ​​the Loess Plateau, with an average annual rainfall of about 440 mm and no irrigation conditions.

[0030] The specific implementation steps are as follows:

[0031] (1) Site leveling: Clean up the abandoned coal gangue stacking site, remove and transport the coal gangue left on the surface, and then clean up weeds, gravel and other sundries to achieve preliminary leveling.

[0032] (2) Site survey: Use the total station (NTS-391R10) produced by the Southern Surveying and Mapping Group to survey the abandoned site, draw a ...

Embodiment 2

[0045] The test site was selected as a coal mine gangue dump in Datong City, Shanxi Province. Since the gangue discharged during the coal mining process needs to be temporarily piled up, the mine built the dump in 2012, and it was abandoned in 2015 due to environmental protection issues, and it was not reclaimed and utilized after it was abandoned. The stacking yard is in a relatively flat ditch, in an irregular rectangular shape, with a total area of ​​2070m 2 (45m×46m). The local area is a rocky mountainous area with an average annual rainfall of about 400 mm and no irrigation conditions.

[0046] The specific implementation steps are as follows:

[0047] (1) Site leveling: Clean up the abandoned coal gangue stacking site, remove and transport the coal gangue left on the surface, and then clean up weeds, gravel and other sundries to achieve preliminary leveling.

[0048] (2) Site survey: Use the total station (NTS-391R10) produced by the Southern Surveying and Mapping Gro...

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Abstract

Provided is a reclamation and improvement method for a waste coal gangue stacking site. The method includes the steps of conducting reconnaissance and measurement on the waste coal gangue stacking site after earth surface arrangement, drawing the topographic map of the site, dividing into grids to conduct grid-type sampling, drawing the pH value distribution map of surface soil according a test result, according to pH value distribution, applying lime in a grading and zoning mode to adjust the pH value of the soil to neutral, after applying a basic fertilizer and spraying composite microbial inoculants, sowing green manure crops, and after turned root returning application, conducting crop rotation on commercial crops and returning application on crop straw. The method provides an effective solution channel for the reclamation, restoration and improvement of Chinese resource-based region coal gangue waste sites, especially, the high-sulfur-bearing waste coal gangue stacking site.

Description

technical field [0001] The invention belongs to the technical field of land reclamation and ecological restoration, and relates to a method for reclamation of abandoned coal gangue storage sites, in particular to a reclamation and improvement method for abandoned coal gangue storage sites with high sulfur content. Background technique [0002] Coal gangue is solid waste generated during coal production and beneficiation, and its main component is SiO 2 and Al 2 o 3 , also contains varying amounts of Fe 2 o 3 , CaO, MgO, Na 2 O, K 2 O.P 2 o 5 , SO 3 As well as trace elements such as Fe, Mn, Cu, Zn, etc., it also contains a certain amount of humic acid. [0003] The emission of coal gangue is equivalent to 15-20% of coal production. my country discharges nearly 150-200 million tons of coal gangue every year. At present, it has accumulated more than 7 billion tons of coal gangue, covering an area of ​​about 70,000 hectares. It is the largest emission in my country. ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02C05G1/00B09C1/00B09C1/08B09C1/10G06F17/30
CPCA01B79/02B09C1/00B09C1/08B09C1/105B09C2101/00C05B13/02G06F16/248C05B17/00C05C3/00C05D1/00C05F3/00
Inventor 张强郜春花张能虎霍成祥耿侃
Owner INST OF AGRI ENVIRONMENT & RESOURCE SHANXI ACAD OF AGRI SCI
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