One-hole multi-purpose method for ground drilling to realize water damage prevention and surface subsidence control

A surface subsidence and ground technology, which is applied to earth-moving drilling, mining equipment, safety devices, etc., can solve the problems of difficult construction, affecting the effect of slurry diffusion and grouting, and large amount of grouting works, and achieves a simple and feasible operation method. , The effect of strong project practicability and low grouting cost
CN108999634BInactive Publication Date: 2019-07-05CHINA UNIV OF MINING & TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA UNIV OF MINING & TECH
Publication Date
2019-07-05
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a hole multi-functionalization method for realizing water damage prevention and surface settlement control through a surface borehole and belongs to the coal mine green miningtechnical field. According to a grouting filling method, a single ground grouting borehole is formed downward from the ground; overlying rock located at different horizons are grouted through the grouting borehole; grouting horizons in a curved sunk zone include a low-bed-separation horizon and a high-bed-separation horizon; overlying rock fractures in a fracture zone are grouted, so that a water-blocking layer can be formed to cut off a water bursting channel of underground bed separation water damage, and therefore, secondary roof water damage can be prevented; a larger proportion of grout is adopted as the filling material of the low-bed-separation horizon so as to form a high-volume-weight rock stratum filling body; and filling bodies formed by the low-bed-separation horizon and the high-bed-separation horizon in the curved sunk zone together act on the control of surface subsidence. According to the method of the invention, a multi-horizon grouting filling project is realized through the same grouting borehole, and therefore, the utilization rate of the borehole is high, cost is low, a filling rate is improved, the subsidence-reducing rate of the surface settlement is improved, and roof water damage prevention and control is achieved.
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Description

technical field

[0001] The invention relates to a one-hole multi-purpose method for realizing water damage prevention and surface subsidence control by ground drilling, and belongs to the technical field of coal mine green mining. Background technique

[0002] In recent years, with the gradual development of coal resources, the increase in the depth of coal seam mining, and the influence of factors such as repeated mining of coal seams and the complexity of the overlying strata structure, will lead to ground subsidence and "three under" coal pressure problems and coal seam Roof delamination water damage seriously affects the sustainable economic development of the mining area. The ground subsidence caused by mining is directly manifested as the destruction of fertile land, damage to ground buildings, and tens of billions of tons of buildings (structures) pressing coal. In addition, the delaminated water damage induced by mining is different from conventional water damage. I...

Claims

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