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Ecological restoration method for coal gangue dump

A technology of ecological restoration and coal gangue, applied in botany equipment and methods, earthwork drilling, gardening, etc., can solve the problems of low economic benefit and high input cost, and achieve the effects of reducing pollution, reducing damage, and promoting growth

Active Publication Date: 2013-07-03
ELION ECOLOGICAL RESTORATION +1
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AI Technical Summary

Problems solved by technology

There are many literatures on phytoremediation of coal gangue hills, but they have not been considered from the comprehensive perspectives of greening, governance, economic benefits, and prevention of coal gangue spontaneous combustion. Generally speaking, the input cost is high and the economic benefits are low, so it is not suitable for many areas.

Method used

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  • Ecological restoration method for coal gangue dump
  • Ecological restoration method for coal gangue dump

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Embodiment Construction

[0015] Coal gangue hill ecological restoration method of the present invention:

[0016] a. Arranging the coal gangue hill 1 into a gentle slope form with an inclination angle less than 30°, as attached figure 1 As shown, when finishing the gentle slope, excavate from top to bottom according to the mountain body layer by layer to set up a ring-shaped plant ditch 3 with a width of 30-60 cm and a depth of 40-50 cm, and the distance between the ring-shaped plant ditch 3 is 2-6 m; Dig downward at intervals to set up longitudinal drainage ditches 2 with a width of 40-80cm and a depth of 30-40cm. figure 2 shown;

[0017] b. Lay and tamp a clay layer on the cleaned coal gangue hill, including the bottom and both sides of the ring-shaped plant ditch 3 and the longitudinal drainage ditch 2. The thickness of the clay layer is 20-30cm;

[0018] c. Lay a mixture of dewatered activated sludge and gangue with a mass ratio of 1:4 on the clay layer outside the annular plant ditch 3 and the...

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Abstract

The invention relates to an ecological restoration method for a coal gangue dump; according to the method, during the arrangement of a coal gangue dump and the arrangement of the dump body, annular plant ditches and longitudinal drainage ditches are disposed from top to bottom; clay is added onto gangue and is tamped; a mixture of dehydrated sludge and gangue is added onto the clay between ditches, and sedum alfredii hance are planted; a mixed substrate of gangue dump surface soil, fermented pig manure, and vermiculite is added into the plant ditches; and prostrate spurge, crape myrtle, and cucurbita pepo are planted orderly and repeatedly in the mixed substrate. The method effectively reduces the spontaneous combustion probability of coal gangue, shortens the restoration period, makes use of dehydrated activated sludge, changes wastes into valuables, and obtain certain economic benefits, environmental benefits, and social benefits.

Description

technical field [0001] The invention relates to an ecological restoration method for coal gangue hills, and is especially suitable for plant greening of coal gangue hills with high temperature, high acidity, pollution by various heavy metals, drought and barrenness. Background technique [0002] Coal, as a primary energy source, accounts for about 74% of my country's energy composition. Coal gangue is the gangue excluded in the coal mining process and coal washing process, accounting for 15%-20% of raw coal production. There are 1,500 coal gangue hills in key coal mines in my country. There are many seats, with a stacking capacity of more than 4 billion tons, covering an area of ​​13,300 hectares. At present, coal gangue is being discharged at an annual rate of 1.5×10 9 The speed of the ton increases, and the new area covers an area of ​​about 3 to 4 million square meters. The pollution of coal gangue seriously damages the ecological system of the mining area, affects the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/32A01G1/00
Inventor 熊集兵郭广礼岳敏查剑锋
Owner ELION ECOLOGICAL RESTORATION
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