Peripheral optical blasting hole anti-blockage protection device and method for tunnel excavation

A tunnel excavation and anti-blocking technology, which is applied in tunneling, blasting, earthwork drilling and mining, etc., can solve the problems of waste and time-consuming anti-blocking methods, and achieve the effects of reducing production costs, enhancing blasting effects, and reducing construction time

Inactive Publication Date: 2021-04-13
CHINA FIRST HIGHWAY ENG
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] For large-section tunnels, there are a lot of blasting holes around (dozens in total), this anti-clogging method is time-consuming, and the plugging materials are basically used for one-time use, which is a serious waste

Method used

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  • Peripheral optical blasting hole anti-blockage protection device and method for tunnel excavation
  • Peripheral optical blasting hole anti-blockage protection device and method for tunnel excavation
  • Peripheral optical blasting hole anti-blockage protection device and method for tunnel excavation

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Embodiment 2

[0037] The peripheral hole anti-clogging series group hole protection device of the present invention is used to protect the peripheral holes of the reserved photoblast layer of large-section tunnels, and is applied in the drilling and blasting construction of the East Tianshan Extra-long Tunnel of the Xinjiang G575 Baha Highway Civil Engineering Project.

[0038] For example, at the stake number K20+306 in the left hole of the tunnel, firstly use the three-arm rock drilling rig to construct the peripheral light blasting holes on the light blasting layer reserved in the previous process according to the design drawings, and the depth of the blasting holes is about 4m , with a diameter of about 40mm, and the number of peripheral holes is 51. The protective plugging of peripheral holes specifically includes the following steps:

[0039] Preliminary grouping of blastholes: according to the principle of operation convenience, all 51 peripheral holes are divided into several groups...

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Abstract

The present invention proposes an anti-clogging hole protection device for peripheral optical blasting holes for tunnel excavation, which includes several series groups, each of which includes two self-locking plugs and several follow-up plugs, and several follow-up plugs. The movable plug is arranged between the two self-locking plugs, and the adjacent two self-locking plugs and the following plugs are connected in series through elastic elements. The invention can realize partial self-locking, is convenient and reliable, reduces the labor intensity of manual plugging of blastholes, reduces construction time, improves work efficiency, and the equipment can be recycled and reused, thereby reducing production costs.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a hole protection device and a method thereof for preventing clogging of peripheral photoblast holes with a reserved photoblast layer in a large-section tunnel. Background technique [0002] The smooth blasting technology used in tunnel excavation can not only save costs, speed up the progress, but also easily ensure construction safety and the excavated tunnel outline is smooth and flat. It has been widely used in various types of rock tunnel construction at home and abroad. middle. Among them, the full-face one-time excavation technology with reserved light blasting layer is a new smooth surface controlled blasting technology in recent years. Advantages, gradually adopted in major domestic tunnel projects. [0003] This blasting method of reserving a photoblast layer has a certain process influence in the tunnel construction, that is, in the traditiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/00F42D1/08F42D1/18E21D9/00
CPCE21D9/006F42D1/00F42D1/08F42D1/18
Inventor 薛君刘拥华李启月李尊武马春德史瑞泽赵春雷郑静
Owner CHINA FIRST HIGHWAY ENG
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