Grouting curtain drilling structure and construction process thereof

A technology of grouting curtain and grouting hole, which is applied in earthwork drilling, wellbore/well components, mining equipment, etc., and can solve the problems of grouting effect and grouting quality discount, increased drilling workload, and increased investment , to reduce the drilling workload, increase the slurry diffusion radius, and reduce investment costs

Active Publication Date: 2017-03-29
NORTH CHINA ENG INVESTIGATION INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the deepening of mining level, mine water damage has gradually become the primary factor affecting its safe mining. In order to prevent conflicts between mine mining and groundwater resource protection, mine curtain grouting is often used to achieve the purpose of water blocking. According to the current domestic implementation Judging from the curtain grouting of several large-water mines, the investment amount is huge, all about hundreds of millions of yuan, mainly because the mine curtain grouting mostly adopts the straight hole drilling method, and the slurry diffusion radius is limited to a certain extent (only about 8m ), in order to ensure that the slurry diffusion radius in each hole can be overlapped t...

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  • Grouting curtain drilling structure and construction process thereof
  • Grouting curtain drilling structure and construction process thereof

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Effect test

Embodiment 1

[0022] Embodiment 1: The grouting curtain drilling structure includes several straight grouting holes 1 arranged along the curtain line, and several straight grouting holes 1 are also provided around the height direction in the straight grouting holes 1. The grouting hole 1 is connected to the branch grouting hole 2 extending radially to the surroundings. After grouting, the direction along the curtain line can increase the high-angle water-conducting crack exposure rate or expose any angle of water-conducting crack. The direction of the branch grouting holes 2 is basically along the vertical plane of the curtain line or located in the vertical plane of the curtain line. The vertical surface of the curtain line is a plane. The branch grouting hole 2 is a downward sloping type. A row of branch grouting holes (2) located on the same side in the straight grouting hole 1 have the same inclination and spacing, forming a fishbone shape. Between two adjacent straight grouting holes...

Embodiment 2

[0024] In a certain iron ore mining area, the strata in the mining area are basically limestone strata, and the water permeability is extremely uneven. Firstly, straight grouting holes are constructed. The distance between the two straight grouting holes is 30m. The slope η was measured to be 4‰ and 3‰ respectively. After coring the straight grouting hole, it was found that the fracture angle was basically greater than 80°, which was a high-angle fracture. Through the direct grouting hole pressure water test, the average water permeability of about 0-200m is 3Lu, and the average water permeability of about 200-400m is 6.3Lu. In order to ensure the grouting effect, the distance D of branch grouting holes is set to 25m for 0-200m. 200-400m is 15m. Through the construction of the branch grouting hole, the final parameters are that the diameter of the branch grouting hole φ2 is 120mm, the radius of curvature R of the branch grouting hole is 3-4.5m, and the deflection angle θ1 of t...

Embodiment 3

[0028] In a roadway of a copper mine, the stratum in the mining area is dominated by granodiorite porphyry, with limestone in the middle, of which the limestone has a relatively high water permeability. First, direct grouting holes are constructed. The hole diameter φ1 is 155mm, and the deflection rate η of the straight grouting hole is measured to be 5‰ and 6.3‰ respectively. After coring the straight grouting hole, it is found that the cracks are irregular and chaotic. Through the direct grouting hole pressure water test, the average water permeability of granodiorite porphyry is 4.7 Lu, and the average water permeability of limestone is 10.4 Lu. In order to ensure the grouting effect, the distance D of branch grouting holes is set as granodiorite porphyry The lot is 20m and the limestone section is 15m. Through the construction of the branch grouting hole, the final parameters are that the diameter of the branch grouting hole φ2 is 120mm, the radius of curvature R of the br...

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Abstract

The invention provides a grouting curtain drilling structure and a construction process thereof, and relates to the technical field of mine curtain grouting. The grouting curtain drilling structure comprises a plurality of straight grouting holes formed along a curtain line. A plurality of branched grouting holes communicating with the straight grouting holes are further formed in the peripheries, in the height direction, in the straight grouting holes, and the directions of the branched grouting holes radiate and extend towards the peripheries. After grouting, in the curtain line direction, the exposure rate of high-angle water guide cracks can be increased, or water guide cracks in any angle can be exposed. The grouting curtain drilling structure and the construction process have the technical effects that compared with the prior art, the exposure rate of the high-angle water guide cracks can be greatly increased, or the water guide cracks in any angle can be exposed, and therefore the grout dispersion radius is increased, the grouting effect is guaranteed, the number of the straight holes and the drilling workload are greatly reduced, the cost of investment of the mine party is reduced, and great economic benefits and social benefits are achieved. Due to the fact that the distance between the straight holes is increased, it is possible that a tunnel inner curtain grouting manner is adopted for water plugging in mines in lofty mountains and steep hills.

Description

technical field [0001] The invention relates to the technical field of mine curtain grouting. Background technique [0002] With the deepening of mining level, mine water damage has gradually become the primary factor affecting its safe mining. In order to prevent conflicts between mine mining and groundwater resource protection, mine curtain grouting is often used to achieve the purpose of water blocking. According to the current domestic implementation Judging from the curtain grouting of several large-water mines, the investment amount is huge, all about hundreds of millions of yuan, mainly because the mine curtain grouting mostly adopts the straight hole drilling method, and the slurry diffusion radius is limited to a certain extent (only about 8m ), in order to ensure that the slurry diffusion radius in each hole can be overlapped to form a curtain body, the hole distance can only be shortened, thereby increasing the drilling workload and making the investment amount ri...

Claims

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Application Information

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IPC IPC(8): E21B33/13E21F16/00
CPCE21B33/13E21F16/00
Inventor 刘新社李淼清周高明袁胜超焦宝辉韩贵雷刘大金王勇程彪薛晓峰赵晓明史建松李东立李刚贾伟杰黄青柱王朝辉高学通章爱卫刘雷刘丹丹石佳宾邬立蒋兵辉毕海涛何经略田博冯建亮
Owner NORTH CHINA ENG INVESTIGATION INST
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