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Ecological restoration method of subsidence area of coal mine

A technology for ecological restoration and subsidence areas, applied in the direction of soil preparation methods, applications, agricultural machinery and tools, etc., can solve the problems of undeveloped coal mine subsidence areas, and achieve the effects of improving soil environmental quality, increasing fertility, restoring and increasing productivity

Inactive Publication Date: 2017-05-31
高庆洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, my country's coal mine subsidence area is still in the basic undeveloped stage.

Method used

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Examples

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Effect test

example 1

[0029] A method for ecological restoration in a geological subsidence area, comprising the steps of:

[0030] Step 1: Fill the subsidence area with coal gangue as backfill, wherein the coal gangue with a particle size greater than 15 mm is filled in the lower layer of the subsidence area, and the coal gangue with a particle size of less than 3 mm is filled in the space near the ground in the subsidence area, and then filled with Bulldozers bulldozed and road rollers compacted to obtain a well-sealed coal gangue layer;

[0031] Step 2: laying a covering layer with a thickness of 0.5m above the gangue layer, wherein the covering layer includes 30wt% sludge, 50wt% coal gangue and 20wt% fly ash;

[0032] Step 3: On the covering soil layer, lay a topsoil layer with a thickness of 0.3m, wherein the topsoil layer includes 40wt% loess, 30wt% fly ash, 28.8wt% sludge, 0.3wt% urea-formaldehyde , 0.5wt% microbial fertilizer and 0.4wt% polyacrylamide, wherein the microbial fertilizer incl...

example 2

[0036] A method for ecological restoration in a geological subsidence area, comprising the steps of:

[0037] Step 1: Fill the subsidence area with coal gangue as backfill, wherein the coal gangue with a particle size greater than 15 mm is filled in the lower layer of the subsidence area, and the coal gangue with a particle size of less than 3 mm is filled in the space near the ground in the subsidence area, and then filled with Bulldozers bulldozed and road rollers compacted to obtain a well-sealed coal gangue layer;

[0038] Step 2: laying a covering layer with a thickness of 1m above the gangue layer, wherein the covering layer includes 60wt% sludge, 30wt% coal gangue and 10wt% fly ash;

[0039]Step 3: laying a topsoil layer with a thickness of 0.5m on the covering soil layer, wherein the topsoil layer includes 60wt% loess, 15wt% fly ash, 23.1wt% sludge, 0.5wt% urea-formaldehyde , 0.8wt% microbial fertilizer and 0.6wt% polyacrylamide, wherein the microbial fertilizer inclu...

example 3

[0043] A method for ecological restoration in a geological subsidence area, comprising the steps of:

[0044] Step 1: Fill the subsidence area with coal gangue as backfill, wherein the coal gangue with a particle size greater than 15 mm is filled in the lower layer of the subsidence area, and the coal gangue with a particle size of less than 3 mm is filled in the space near the ground in the subsidence area, and then filled with Bulldozers bulldozed and road rollers compacted to obtain a well-sealed coal gangue layer;

[0045] Step 2: laying a 0.8m-thick covering soil layer above the coal gangue layer, wherein the covering soil layer includes 40wt% sludge, 50wt% coal gangue and 10wt% fly ash;

[0046] Step 3: On the covering soil layer, lay a topsoil layer with a thickness of 0.4m, wherein the topsoil layer includes 50wt% loess, 20wt% fly ash, 28.5wt% sludge, 0.4wt% urea-formaldehyde , 0.6wt% microbial fertilizer and 0.5wt% polyacrylamide, wherein the microbial fertilizer inc...

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Abstract

The invention discloses an ecological restoration method of a geologic subsidence area. The method comprises the following steps: step I: filling the subsidence area with gangue as a backfill material, bulldozing with a bulldozer, and compacting by a road roller to form a gangue layer; step II: laying a 0.5-1 m thick covering soil layer above the gangue layer; step III: laying a 0.3-0.5 m thick surface soil layer on the covering soil layer; and step IV: planting Chinese pines, populus davidiana dode and leguminous trees on the surface soil layer in an inter-row mixing manner at a mixing ratio of (0.5-1.5):(1-3):(2-8), wherein the covering soil layer comprises 30-60wt% of sludge, 30-50wt% of gangue and 10-30wt% of pulverized fuel ash; and the surface soil layer comprises 40-60wt% of loess, 15-30wt% of pulverized fuel ash, 20-30wt% of sludge, 0.3-0.5wt% of ureaformaldehyde, 0.5-0.8wt% of bacterial manure and 0.4-0.6wt% of polyacrylamide.

Description

technical field [0001] The invention relates to a method for ecological restoration of a geological subsidence area. More specifically, the present invention relates to a method with excellent restoration function for the ecological environment of geological subsidence areas, especially coal mine subsidence areas. Background technique [0002] Geological subsidence refers to a geological phenomenon in which the top of surface rocks and caves in the body collapse downwards under the action of man-made or natural geological factors, forming collapse pits, collapse holes, and collapse troughs. Among them, especially the land and ecological environment damage caused by mining, the amount is large and wide, and the situation is becoming more and more severe. The impact of coal mining on the natural environment is mainly manifested in the damage to water resources and surface structures, resulting in surface subsidence and changes in groundwater levels within a certain range. Th...

Claims

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Application Information

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IPC IPC(8): A01B79/02
CPCA01B79/02
Inventor 高庆洋
Owner 高庆洋
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