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Construction method for additionally forming perimeter auxiliary holes in peripheries of perimeter holes of vertical shaft

A construction method and peripheral eye technology, applied in blasting and other directions, can solve problems such as the small support range of umbrella drills, and achieve the effects of reducing construction costs, improving quality, and good economic benefits

Inactive Publication Date: 2016-06-15
CHINA RAILWAY 18TH BUREAU GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcoming of the small support range of the umbrella drill in the existing shaft construction and excavation, and propose a construction method that effectively solves over-excavation and under-excavation. The method is simple in process, easy to operate, and economical and efficient

Method used

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  • Construction method for additionally forming perimeter auxiliary holes in peripheries of perimeter holes of vertical shaft
  • Construction method for additionally forming perimeter auxiliary holes in peripheries of perimeter holes of vertical shaft
  • Construction method for additionally forming perimeter auxiliary holes in peripheries of perimeter holes of vertical shaft

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Embodiment Construction

[0018] Such as Figure 1-2 As shown, a construction method for adding peripheral auxiliary holes outside the peripheral holes of the shaft, the specific implementation process is as follows: ①Use 6 hand-held YT-28 pneumatic drills to drill peripheral auxiliary holes after drilling the peripheral holes, the hole depth is 1500mm, It is required that the positioning radius is accurate, the eye positions are staggered from each other, the distance between the eyes is uniform, the inclination angle of the peripheral eyes is basically the same, and the peripheral auxiliary eyes should be vertical, see the attached picture. ② The peripheral eye and peripheral auxiliary eye are charged at the same time according to the drilling and blasting design parameters. and trimming.

[0019] A construction method for adding peripheral auxiliary holes on the periphery of shaft peripheral holes is carried out in accordance with the following steps: ① After the peripheral holes are drilled by the...

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Abstract

Provided is a construction method for additionally forming perimeter auxiliary holes in peripheries of perimeter holes of a vertical shaft. The construction method for additionally forming the perimeter auxiliary holes in the peripheries of the perimeter holes of the vertical shaft comprises the following steps that 1, the perimeter auxiliary holes are drilled after the perimeter holes are drilled through an umbrella driller, and the depth of the holes is 1500 mm; 2, the perimeter auxiliary holes and the perimeter holes are charged with powder at the same time, and the segment numbers of detonators of the perimeter holes and the perimeter auxiliary holes are 7 and 9 correspondingly; and 3, the perimeter auxiliary holes detonate after the perimeter holes detonate. The perimeter auxiliary holes are drilled through six YT-28 air drillers after the perimeter holes are drilled through the umbrella driller, and the drilling time is not prolonged. The problem that a shaft wall is excavated excessively or insufficiently is solved effectively, the phenomenon of insufficient detonation after the perimeter holes detonate is avoided, and the gangue drainage, net hanging and anchor spraying time is shortened. The expenses of wind, water, electricity, labor, concrete spraying and other materials are saved. The quality of preliminary bracing is improved, and the construction safety of large section height is ensured. The detonation efficiency is improved, the construction progress is accelerated, and the good technical and economic effects are obtained.

Description

technical field [0001] The invention relates to a construction technique for effectively improving the quality of shaft excavation sub-projects, specifically, a construction method for full-section primary smooth blasting in which auxiliary holes are added outside the peripheral holes of the shaft. Background technique [0002] In the comprehensive mechanized construction of deep shafts, umbrella drills are used for excavation and medium and deep hole blasting. Each deep shaft is equipped with only one expensive umbrella drill. However, the geological conditions of deep shafts are complex. In areas with weak rock formations, the concrete lining must be thickened, or even reinforced concrete should be designed, which directly leads to the increase of the uncultivated diameter of the excavation. The excavation site needs to be re-drilled and blasted, which wastes materials and man-hours. Over-excavation sites require more ballast and more concrete to be filled, and the constru...

Claims

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Application Information

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IPC IPC(8): F42D3/04F42D1/00
CPCF42D3/04F42D1/00
Inventor 张馨陈历珊张湘平
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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