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Device and method for repairing ground cracks of coal mining loess subsidence area

A technology for surface cracks and subsidence areas, applied in soil protection, construction, infrastructure engineering, etc., can solve the problems of environmental impact and high cost, achieve good effects, ensure restoration effects, and prevent soil loss.

Inactive Publication Date: 2017-02-01
陕西省地质环境监测总站
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] 3) Fluid grouting is used, and the injected cement, lime or chemical materials will have a certain impact on the environment, and the cost is high

Method used

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  • Device and method for repairing ground cracks of coal mining loess subsidence area
  • Device and method for repairing ground cracks of coal mining loess subsidence area
  • Device and method for repairing ground cracks of coal mining loess subsidence area

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Experimental program
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Effect test

Embodiment

[0070] Loess Plateau 1 Coal Mining 2 -2 No. 2 coal, one of the No. 2203 working faces was mined with a large number of surface cracks, which were repaired using the following steps:

[0071] Step 1: Observing the depth of all the surface cracks formed in the No. 2203 coal mining face, the depth of the surface cracks is 0.1 meters to 2.8 meters.

[0072] Step 2: Divide the surface cracks into two categories, one is the boundary crack 3, the coal mining face 1 two lanes, the cutting hole and the harvest line are vertically projected to the ground fissures beyond the ground, there are 11 cracks, and the remaining cracks For non-boundary cracks 2, there are 38;

[0073] Step 3: Use different grouting methods for non-boundary crack 2 and boundary crack 3.

[0074] For non-boundary crack 2, use the following steps for grouting:

[0075] First, the non-boundary crack 2 is filled with sand, and the sand is taken from the local material, the particle size is 0.05-0.25mm, the clay co...

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Abstract

The invention relates to a device and a method for repairing ground cracks of a coal mining loess subsidence area. The method comprises the steps of during repairing, firstly, detecting the depth of all the ground cracks formed on a coal mining working surface and judging the type; filling the ground cracks with a filler, and arranging grouting pipes and electrodes at the ground cracks; adding a microorganism bacterial liquid into the grouting pipes, and introducing a direct current between the grouting pipes and the electrodes; adding a nutrient solution into the grouting pipes; when the ground cracks are filled with mixed size of the microorganism bacterial liquid and the nutrient solution, stopping grouting; and after the injected mixed size is solidified, planting plants on the ground. According to the invention, the method is simple and easy to implement, the method is more environment-friendly through microorganism grouting, the distribution of microorganism products can be made more uniform through electric traction, as a renewable matter, microorganisms can be continuously utilized on a large scale, different prevention methods are utilized for cracks in different coal mining positions, and the limitation of one method is avoided.

Description

[0001] 【Technical field】 [0002] The invention relates to the fields of engineering geology, environmental engineering and mining engineering, and in particular relates to a device and method for repairing surface cracks in coal mining loess subsidence areas. [0003] 【Background technique】 [0004] There are abundant coal resources buried under the Loess Plateau in my country, but the coal seam is shallow and the ecological environment is fragile. Coal mining will cause a large number of ground fissures. Ground fissures need to be treated to achieve waterproofing, prevent wind leakage, and improve the ecological environment. At present, most of the coal mining ground fissures are treated by backfilling or grouting methods. [0005] At present, the following main problems exist in the treatment of ground fissures in coal mining loess subsidence areas: [0006] 1) Use soil backfill in situ due to the low cementation of the backfill, the soil after backfill is still loose, espe...

Claims

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Application Information

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IPC IPC(8): E02D3/12E02D3/11E02D15/02
CPCE02D3/11E02D3/12E02D15/02E02D2250/003
Inventor 范立民
Owner 陕西省地质环境监测总站
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