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Tunneling anti-blocking hole protecting device and method for peripheral smooth blasting holes

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

Inactive Publication Date: 2018-11-23
CHINA FIRST HIGHWAY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Tunneling anti-blocking hole protecting device and method for peripheral smooth blasting holes
  • Tunneling anti-blocking hole protecting device and method for peripheral smooth blasting holes

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Embodiment 2

[0039] 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.

[0040] 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 , a diameter of about 40mm, and the number of peripheral holes is 51.

[0041] The protective plugging of peripheral holes specifically includes the following steps:

[0042] Preliminary grouping of blastholes: according to the principle of operation convenience, all 51 peripheral holes are divided into several gr...

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Abstract

The invention provides a tunneling anti-blocking hole protecting device for peripheral smooth blasting holes. The device comprises a plurality of series-connection groups; each series-connection groupcomprises two self-locking plugs and a plurality of follow-up plugs, the follow-up plugs are arranged between the two self-locking plugs, every two adjacent follow-up plugs are in series connection with each other through an elastic element, and the adjacent self-locking plugs and follow-up plugs are in series connection through elastic elements. The device can achieve local self-locking and is convenient and reliable to use, the labor intensity of manually blocking the blastholes is reduced, the construction time is shortened, the work efficiency is improved, the device can be recycled and reused, and the production cost is reduced.

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 Applications(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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