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Construction method for additionally forming periphery auxiliary holes in periphery of vertical shaft periphery hole

A construction method and auxiliary 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, ensuring flatness, and achieving good technical and economic effects.

Inactive Publication Date: 2015-05-13
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 periphery auxiliary holes in periphery of vertical shaft periphery hole
  • Construction method for additionally forming periphery auxiliary holes in periphery of vertical shaft periphery hole
  • Construction method for additionally forming periphery auxiliary holes in periphery of vertical shaft periphery hole

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Embodiment Construction

[0019] 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. ② The peripheral eye and peripheral auxiliary eye are charged at the same time according to the drilling and blasting design parameters. and trimming.

[0020] Table 1 Drilling and blasting parameter design of the bedrock section of the auxiliary shaft in Lengquan Mine

[0021]

[0022] Table 2 Drilling and blasting original conditions and blasting effects of the bedrock section of th...

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Abstract

The invention discloses a construction method for additionally forming periphery auxiliary holes in the periphery of a vertical shaft periphery hole. The construction method includes the following steps that (1), after the periphery hole is drilled through an umbrella drill, the periphery auxiliary holes are drilled, and the hole depth is 1500 mm; (2), explosives are loaded into the periphery auxiliary holes and the periphery hole at the same time, and the number of blasting cap sections of the periphery hole is seven, and the number of blasting cap sections of the periphery auxiliary holes is nine; (3), the periphery auxiliary holes are detonated after the periphery hole is detonated. The construction method has the advantages that six YT-28 type air drills are used for drilling the periphery auxiliary holes after the periphery hole is drilled through the umbrella drill, and therefore drilling time is not prolonged; shaft wall over-excavation and under-excavation are effectively avoided, cap retaining is avoided after the periphery hole is detonated, and therefore waste rock removing, net hanging and anchoring and shotcreting time is shortened; the costs for wind, water, electricity, manpower, sprayed concrete and other materials are lowered, supporting quality at the initial stage is improved, and large-section-height construction safety is guaranteed; detonation efficiency is improved, construction progress is accelerated, and good economical and technical effects are achieved.

Description

technical field [0001] The invention relates to a construction method 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 constructi...

Claims

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Application Information

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