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Method for utilizing mine coal gangues to control and fix sands

A technology of coal gangue and mines, which is applied in the field of sand control and sand fixation by using coal gangue from mines, can solve the problems of rapid expansion and severe development situation, and achieve the effects of low efficiency, long project utilization period and simple implementation technology

Inactive Publication Date: 2012-04-25
XIAN UNIV OF SCI & TECH
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Problems solved by technology

Second, the expansion speed is fast and the development situation is severe

Method used

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  • Method for utilizing mine coal gangues to control and fix sands
  • Method for utilizing mine coal gangues to control and fix sands
  • Method for utilizing mine coal gangues to control and fix sands

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with specific embodiments.

[0020] In the desert, coal gangue 10 is placed into a 2m----5m square grid, which can also be adjusted according to the wind direction and wind force. The density in the main wind direction is greater than that in the vertical direction; the greater the wind force, the greater the density. Then plant shrubs 20 ( figure 1 ). The height of the shrub 20 is lower than the height of the coal gangue wind barrier and close to the coal gangue wind barrier. In the grid surrounded by gangue wind barriers, due to the blocking of coal gangue wind barriers, according to the theory of wind and sand physics, the wind speed in the grid can be significantly reduced ( figure 2 ), and the windproof effect is better than ordinary grass grids, which is conducive to the safe survival of shrubs in winter. At the same time, the temperature in the desert area is high during the day and low at...

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Abstract

The invention discloses a method for utilizing mine coal gangues to control and fix sands. In the method, the coal gangues are placed in a grid shape to form a coal gangue windbreak, and shrubs are planted in grids. The placing density of the coal gangues is in direct proportion to the local wind power, and the placing density of the coal gangues in a prevailing wind direction is larger than the placing density vertical to the prevailing wind direction. An area of each grid is 2-5 square meters. The height of the shrubs is lower than the height of the coal gangue windbreak. By utilizing the mine solid waste coal gangues as materials, the method has the effects of, firstly, efficiently utilizing the mine solid waste coal gangues and solving the problems of large occupied land area of the coal gangues as well as spontaneous combustion and leaching pollution caused by the coal gangues; and secondly, solving the problems of low efficiency and easy damage of artificial grass planting gridsin the process of current sand control. The invention has the advantages of simple implementation technology and long engineering utilization period, can efficiently control mobile dunes and blowout pits, can be widely used for sand control and fixation engineering in China and is particularly suitable for desertification treatment in coal mining areas of Shanxi, Shaanxi and Inner Mongolia.

Description

technical field [0001] The invention relates to a method for controlling sand and fixing sand by using mine solid waste coal gangue. It can be widely used in sand control and sand fixation projects, and is especially suitable for desertification control in Shanxi, Shaanxi and Inner Mongolia coal mining areas in my country. It belongs to the waste resource utilization and ecological construction in the field of environmental protection. Background technique [0002] Coal gangue is solid waste discharged during the coal mining process and coal washing process. It is a black-gray rock with low carbon content and harder than coal that is associated with coal seams during the coal formation process. Including the excavation gangue during the roadway excavation, the gangue extracted from the roof, floor and interlayer during the mining process, and the gangue picked out during the coal washing process. Its main components are Al2O3 and SiO2, and it also contains varying amounts ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/00
CPCY02A40/22
Inventor 赵晓光贾锐鱼
Owner XIAN UNIV OF SCI & TECH
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