Ground drilling sectional type grouting device

Abstract

The invention discloses a ground drilling sectional type grouting device. The ground drilling sectional type grouting device comprises a slurry tank, a grouting main pipe, a reaming assembly, a liquidinjection pipe, a low-pressure grouting pipe, an upper supporting and blocking assembly and a lower supporting and blocking assembly, wherein the slurry tank supplies slurry to the grouting main pipeand the low-pressure grouting pipe, the grouting main pipe is rotationally arranged in a centralizing sleeve, and the upper supporting and blocking assembly and the lower supporting and blocking assembly are arranged on the outer circumference of the centralizing sleeve; the reaming assembly is further arranged on the grouting main pipe, and the reaming assembly can be driven to rotate for reaming by driving the grouting main pipe to rotate; after reaming, liquid is injected into the upper supporting and blocking assembly and the lower supporting and blocking assembly through the liquid injection pipe so that the upper supporting and blocking assembly and the lower supporting and blocking assembly can expand and be correspondingly embedded into reamed holes, and the low-pressure groutingpipe can inject slurry into the space between the upper supporting and blocking assembly and the lower supporting and blocking assembly so as to form a sealed hole; and then the grouting main pipe injects slurry into the bottom of the sealed hole, and sectional type grouting is achieved.

Description

technical field [0001] The invention belongs to the technical field of segmental grouting, and in particular relates to segmental grouting equipment for ground drilling. Background technique [0002] At present, in the process of mining coal mines, it is often necessary to drill holes. The formation of holes can be used in many aspects, such as using drill holes for anchoring when performing support, or using drill holes for gas drainage. However, at present, due to the loose and broken coal body or the dynamic change of the crack structure around the borehole, the hole collapse is easy to occur when the hole is formed, which endangers the life safety of the staff. [0003] In order to reduce the occurrence of this kind of situation, the coal body can be reinforced first. Generally speaking, drilling and grouting is the best way of reinforcement. However, direct grouting will cause the grout to rise up, and the grouting pressure is not enough to form Effective grout layer, ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the process of mining coal mines, it is often necessary to drill holes. The formation of holes can be used in many aspects, such as using drill holes for anchoring when performing support, or using drill holes for gas drainage. However, at present, due to the loose and broken coal body or the dynamic change of the crack structure around the borehole, it is easy to collapse the hole when the hole is formed, which endangers the life safety of the staff.

[0003] In order to reduce the occurrence of this kind of situation, the coal body can be reinforced first. Generally speaking, drilling and grouting is the best way of reinforcement. However, direct grouting will cause the grout to rise up, and the grouting pressure is not enough to form Effective grout layer, if the existing bladder is used to seal the hole and then grouted, because the bladder cannot be in close contact with the hole wall, the high-pressure slurry will flow out from the gap between the bladder and the hole wall, thereby Does not form a good seal

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