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Fully mechanized mining face construction region deep hole staging pressurization grouting method

A fully mechanized mining face, staged technology, applied to mining equipment, earthwork drilling, wellbore lining, etc., can solve problems affecting work efficiency, insufficient, uneven slurry diffusion, etc., to ensure the grouting effect, increase the Diffusion radius, effect of improving grouting efficiency

Inactive Publication Date: 2020-05-15
SHANXI JINMEI GRP TECH RESEACH INST
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Problems solved by technology

[0003] In order to solve the problems that the direct grouting of the working face affects the work efficiency, and the grouting process is uneven and insufficient, the present invention proposes a step-by-step pressurized grouting method for deep holes in the structural area of ​​the fully mechanized mining face
It can well solve the problem of uneven grout diffusion, greatly improving the grouting efficiency and grouting effect

Method used

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  • Fully mechanized mining face construction region deep hole staging pressurization grouting method
  • Fully mechanized mining face construction region deep hole staging pressurization grouting method
  • Fully mechanized mining face construction region deep hole staging pressurization grouting method

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Embodiment Construction

[0023] Such as figure 1 As shown, a method of pressurized grouting in deep holes in the structural area of ​​a fully mechanized mining face in stages, including construction grouting drilling, pipe lowering, hole sealing, and grouting;

[0024] Specifically: construction grouting drilling, the construction area is 50-100m ahead of the working face, the hole diameter is 75mm, and the final hole position of the drilling passes through the abnormal area 5m. The above-mentioned abnormal areas are faults, subsidence columns, broken zones and other geological structural areas detected in advance.

[0025] Such as figure 2 As shown, the lower pipe uses PE pipe 5 and grouting steel pipe 2. The front end of PE pipe 5 is provided with grouting hole 6, and the rear end of PE pipe 5 is provided with counter-perforation 4; grouting steel pipe 2 and PE pipe with grouting hole The pipe 5 is connected, and the PE pipe 5 is located at the front end of the entire grouting pipeline; in the en...

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Abstract

The invention relates to a coal mining grouting technology, in particular to a fully mechanized mining face construction region deep hole staging pressurization grouting method. The fully mechanized mining face construction region deep hole staging pressurization grouting method comprises the steps of construction grouting drilling, pipe downward feeding, hole sealing and grouting. According to the fully mechanized mining face construction region deep hole staging pressurization grouting method, the staging pressurization grouting mode is adopted, and therefore the purpose that different grouting pressures and different grouting flow quantities are carried out in different stages can be achieved, fully diffusion of grout is ensured, the grouting effect of the abnormal region of a working face is guaranteed, the single grouted region is prevented from being repeatedly grouted, the grouting efficiency is improved, the grout diffusion radius is increased, and the grouting effect is ensured. Advanced grouting reinforcement is conducted in the abnormal region, and therefore the stability and the bearing capacity of a coal and rock mass in the abnormal region are improved, and the situation that the working face safely and efficiently passes through the abnormal region is ensured.

Description

technical field [0001] The invention relates to a coal mine mining grouting technology, in particular to a step-by-step pressurized grouting method for deep holes in a structural area of ​​a fully mechanized mining face. Background technique [0002] There are many geological structures such as faults, subsidence columns, and broken zones in the coal mine mining face. These geological structures are likely to cause the occurrence of slabs and roof caving in the working face. In order to solve this problem, direct grouting reinforcement on the working face is usually used to deal with it. However, in the field grouting process, a stop grouting pressure is often set, and after the grouting begins, the pump is turned on for grouting until the stop grouting pressure is reached, and the grouting is stopped. However, due to the different degrees of fracture development in coal and rock bodies, the diffusion time of grout in different sizes of fractures is also different. Only one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21B33/13
CPCE21B33/13E21D11/10
Inventor 陶广美王俊杰曹建波马赛张江利赵斌申进波王萌司朝陈志强丛日东原小路王朋卫马晋琴王莉
Owner SHANXI JINMEI GRP TECH RESEACH INST
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