Grouting curtain drilling structure

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...

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 to form a curtain body, the hole distance can only be shortened, thereby increasing the drilling workload and making the investment amount rise linearly

Such a short-hole construction can only be used for mines with small surface fluctuations. For mines located in high mountains, it will be impossible to use curtain grouting straight hole construction technology to block water.

In addition, the method of straight hole drilling in the mine curtain grouting process is only effective for low-angle water-conducting fissures and some staggered water-conducting fissures. In mines with high-angle water-conducting fissures, the traditional curtain grouting method is still used. The grouting effect and grouting quality will be greatly reduced

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