Method for controlling settlement range of grouting filling earth surface

Abstract

The invention discloses a method for controlling a settlement range of a grouting filling earth surface. The method comprises the following steps that (1) geological data of a working face in a coal mining area are collected, and stratum lithology, structure and hydrogeology in the working face area are analyzed; (2) a drilling structure is designed according to analysis results; (3) before the working face of the coal mining area is mined, a plurality of boreholes are sequentially formed in the coal seam direction above a grouting filling control area of the working face of the coal mining area, and a ground movement settlement observation system is established on the boreholes; and (4) when coal mining is started at the working face in the coal mining area, grouting is started at the position 50-100 m away from the boreholes, and grouting is continued after the coal mining in the working face of the coal mining area is completed until the surface settlement is stable. According to the method, a qualitative change is made in the coal mining method, instead of waiting for comprehensive treatment of a subsidence area after coal mining, grouting and filling are carried out at the same time of coal mining to protect the land and other ground facilities and prevent earth surface settlement from forming damage.

Description

technical field [0001] The invention belongs to the technical field of grouting filling methods, and in particular relates to a method for controlling the surface subsidence range of grouting filling. Background technique [0002] The eastern region of China is represented by the Northeast region and the Huanghuaihai region. Most of the eastern mining areas are located in the plains, and the mining method is mainly the longwall caving method. When there are villages and other buildings (structures) on the surface that need to be protected, protective mining methods (such as strip mining, filling mining, etc.) need to be considered. etc.) to reduce the damage and deformation of the overlying rock in order to protect the surface buildings (structures). Swamp, serious loss of cultivated land. [0003] For the comprehensive management of the subsidence area formed by coal mining, the traditional method of filling the subsidence area of ​​coal mining is: 1) stripping the topsoi...

AI Technical Summary

Problems solved by technology

[0006] 2) After filling and reclamation in the coal mining subsidence area, the soil structure will be destroyed to a large extent, resulting in too barren soil after filling and reclamation

[0007] 3) Destruction of the water resource cycle

Surface subsidence and surface cracks caused by coal mining will cause groundwater leakage, resulting in the loss of water resources, causing serious adverse effects on residents' production and domestic water, and increasing water difficulties; Excessively long, causing great damage to the soil structure

[0008] 4) Reclamation time is difficult to grasp

When the start time of the reclamation work is too early, possible future situations will have a great impact on the reclamation work, causing all previous efforts to be in vain; when the start time of the reclamation work is too late, the reclamation work will The project will be difficult to proceed due to missing the best time for reclamation, which will cause the work to fail to keep up with the actual requirements

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