Coal gangue and soil layer combination based multilayer structure filling reclamation method

A multi-layer structure, coal gangue technology, applied in land preparation methods, applications, agricultural machinery and implements, etc., can solve the problems of waste of land resources, easy pollution, low crop yield, etc., to improve air permeability, save manpower and material resources, guarantee effect of plant growth

Active Publication Date: 2012-11-28
ANHUI UNIV OF SCI & TECH
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Problems solved by technology

[0002] For coal mining areas, due to the mining of coal, large-scale subsidence areas will appear on the surface. Coal gangue piled up on the surface all the year round to form coal gangue hills of different sizes. Coal gangue hills are prone to spontaneous combustion, pollute the environment after being leached by rainwater, and occupy land resources at the same time
The existing coal gangue filling reclamation generally adopts the method of directly filling the subsidence area with coal gangue and then covering the topsoil. Although a certain reclamation effect has been achieved, the soil water and fertilizer retention performance of the reclamation land is poor, and the yield of cultivated crops is low, so it cannot be maximized. Restoring the land use value of the subsidence area to a certain extent

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  • Coal gangue and soil layer combination based multilayer structure filling reclamation method

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] figure 1 It is a schematic diagram of the filling structure using the multi-layer structure filling and reclamation method based on the combination of coal gangue and soil layers of the present invention. The filling and reclamation method based on the multi-layer structure combining coal gangue and soil layer includes the following implementation steps.

[0021] 1. Find out and sort out the situation of the area to be reclaimed

[0022] Measure and calculate the earthwork (area), average depth, and maximum depth of the area to be reclaimed, grasp the topographical characteristics of the a...

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Abstract

The invention relates to a coal gangue and soil layer combination based multilayer structure filling reclamation method, comprising the following implementation steps of: a, measuring and calculating the area, the average depth and the maximum depth of a to-be-reclaimed area, on the basis, further estimating the filling elevation and the filling thickness of the to-be-reclaimed area and calculating the porosities of two to-be-filled coal gangues with different particle sizes; b, filling the coal gangue with the larger diameter in the two to-be-filled coal gangues into the bottommost layer of the to-be-reclaimed area; c, covering a clay layer on the first coal gangue layer and rolling to be level; d, covering the coal gangue with the smaller diameter in the two to-be-filled coal gangues on the clay layer, and tamping in layers; and e, covering surface soil on the second coal gangue layer and rolling to be level. By using the method provided by the invention, not only can the reclamation of a coal gangue filling sinking area be realized, but also the problem of poor water retention, soil moisture conservation and fertilizer conservation performances can be solved and the economic benefits of land products can be restored to the maximum extent.

Description

technical field [0001] The invention relates to a reclamation method, in particular to a multi-layer structure filling reclamation method based on the combination of coal gangue and soil layers. Background technique [0002] For coal mining areas, due to the mining of coal, large-scale subsidence areas will appear on the surface. Coal gangue piles up on the surface all the year round to form coal gangue hills of different sizes. Coal gangue hills are prone to spontaneous combustion, pollute the environment after being leached by rainwater, and occupy land resources at the same time. The existing coal gangue filling reclamation generally adopts the method of directly filling the subsidence area with coal gangue and then covering the topsoil. Although a certain reclamation effect has been achieved, the soil water and fertilizer retention performance of the reclamation land is poor, and the yield of cultivated crops is low, so it cannot be maximized. Restore the land use value...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00
Inventor 徐良骥严家平许善文刘凡黄璨
Owner ANHUI UNIV OF SCI & TECH
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