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Segmented curtain grouting method for fault working face with too large inclination angle of shaft

A curtain grouting and construction method technology, which is applied in wellbore/well components, earthwork drilling, sealing/packing, etc., can solve the problems of large amount of drilling engineering, many grouting holes and poor grouting effect, etc. Achieve good injectability, improve drilling efficiency, and shorten well construction period.

Active Publication Date: 2019-01-15
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] Purpose of the invention: In order to overcome the technical problems of many grouting holes in faults with excessively large dip angles in the prior art, a large amount of pore-making engineering, and poor grouting effects, the present invention provides a shaft shaft that passes through faults with high dip angles efficiently and safely curtain grouting method

Method used

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  • Segmented curtain grouting method for fault working face with too large inclination angle of shaft
  • Segmented curtain grouting method for fault working face with too large inclination angle of shaft
  • Segmented curtain grouting method for fault working face with too large inclination angle of shaft

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] A segmented curtain grouting construction method for a working face on a fault with an excessively large dip angle in a vertical shaft shaft. The excavation face of the vertical shaft shaft is constructed in segments in terms of depth. The distance between the bottom surfaces of each segment is 20-40 m. On the bottom surface of each section, after the construction of the previous shallow section is completed, the next deep section will be constructed; during the construction of each section, the shaft shaft will be excavated first, and when the bottom surface of the current section is reached, the shaft will be excavated. The wall and the grouting cushion are poured, and then the construction is drilled and grouted to complete the construction of the current section. For each segment, it is necessary to pour a concrete grout-proof cushion on the excavation face ...

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Abstract

The invention discloses a segmented curtain grouting method for a fault working face with a too large inclination angle of a shaft. The driving working face of the shaft is casted with a concrete grouting stop cushion, an initial drilling stage of construction is started in the grouting stop cushion along the concentric circumference of the shaft, an orifice pipe is mounted in a boring orifice position, construction drilling is continued via the orifice pipe till a grouting depth position, a flange is installed in the orifice pipe, and connected with a high-pressure grouting hose and a grouting device, the orifice pipe is sealed and fixed in a gravity grouting manner, and space between the orifice pipe and a boring is filled tightly by a cement slurry. A segmented boring grouting manner isused to avoid construction of multiple grouting holes in a narrow space of the shaft, the number of grouting holes is reduced much, the drilling efficiency is improved, and shaft construction periodis shortened; and grouting is carried out in a cyclic manner by alternation among penetration, soil compaction and cleavage, the water blocking performance of grouting is improved, fragmented surrounding rocks are more reliable, and it is ensured that the shaft penetrates the fault efficiently and safely.

Description

technical field [0001] The invention relates to the technical field of mine shaft excavation, in particular to a segmented curtain grouting construction method for a fault working face with an excessively large inclination angle of a shaft shaft. Background technique [0002] With the rapid development of the national economy, the demand for mineral resources is increasing day by day. The construction of deep mines and other underground projects is extending and shifting to complex and changeable geological conditions, and project construction is moving to difficult areas. In particular, most of the mine fields in my country encountered problems such as many aquifers, large water content, and large water inflow during the shaft construction period, which seriously affected the construction speed and quality of the shaft engineering, and even accidents where the mine was submerged by sudden water gushing occurred. Major economic losses and casualties. Therefore, properly hand...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13
CPCE21B33/13
Inventor 孟庆彬韩立军王从凯钱唯李兴权刘克响
Owner CHINA UNIV OF MINING & TECH
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