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Horizontal joint fissure tunnel-smooth-excavation blasting method

A horizontal joint, smooth blasting technology, applied in blasting and other directions, can solve the problems of low blasting energy utilization rate, poor tunnel smooth blasting effect, and low blasting footage, so as to improve blasting effect, energy utilization rate and blasting. The effect of driving footage and improving the environment

Pending Publication Date: 2018-08-31
GUIZHOU HIGHWAY ENG GRP +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of low blasting energy utilization rate in existing horizontal joint tunnels, low blasting excavation footage, and poor tunnel smooth surface blasting effect, etc., and invent a smooth tunnel excavation and blasting method for horizontal joint fissure tunnels.

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  • Horizontal joint fissure tunnel-smooth-excavation blasting method
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  • Horizontal joint fissure tunnel-smooth-excavation blasting method

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Embodiment Construction

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the content of the present invention is not limited to the following embodiments.

[0035] A blasting method for smooth surface excavation of a tunnel with horizontal joints and fissures, which includes a blasting device controlled by cutting grooves and an axially uncoupled rapid chemical transfer device for smooth blasting;

[0036] The grooving control blasting device includes a percussive rock drilling rod 17 and a V-shaped drill bit 18. The percussive rock drilling rod 17 is threadedly connected by a steel pipe, and each section of the steel pipe is equipped with a V of different sizes. Font drill bit 18, the size of described V font drill bit 18 is constantly enlarged, can reduce a grooving occurrence resistance is big, the problems such as poor groove quality, described V font drill bit 18 and steel pipe are connected by thread;

[0037]The s...

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Abstract

The invention belongs to the field of tunnel engineering for horizontal joint development of rock mass, and particularly relates to a horizontal joint fissure tunnel-smooth-excavation blasting method.The method comprises the steps that a grooving control blasting device and a smooth blasting axial uncoupled rapid explosive transfer device are used; slotting blasting of blastholes outside peripheral holes of a tunnel and uncoupling charge of the peripheral holes are carried out; and through millisecond blasting, the requirements of footage and the smooth effect of tunnel excavation blasting are realized. According to the horizontal joint fissure tunnel-smooth-excavation blasting method, the advantages of the slotting blasting and axial uncoupled blasting are fully combined, the influence of horizontal joint fissure on blasting construction is reduced, the blasting energy utilization rate and blasting tunneling footage of the horizontal joint tunnel are improved, the smooth blasting effect of the tunnel is improved, the use of peripheral hole explosives is reduced, blasting vibration is reduced, the surrounding rock stability is improved, the construction risk is reduced, the tunnelconstruction environment is improved, the number of operators is reduced, and the charge efficiency is improved.

Description

technical field [0001] The invention belongs to the engineering field of rock mass horizontal joint development tunnels, and in particular relates to a smooth-surface excavation and blasting method for horizontal joint fissure tunnels. Background technique [0002] Due to various factors such as rock genesis and crustal movement, the rock mass is multi-layered and cracked, and the development of horizontal joints and cracks in the mountainous rocks of Guizhou is particularly obvious. [0003] When blasting in a rock mass with well-developed horizontal joints and fissures, the blasting energy is preferentially released toward the fissures because the fissures and joints have a guiding effect on the transfer of blasting energy. Because of the existence of fissures, the explosion energy is released from the fissures , resulting in waste of explosive blasting energy, poor rock crushing effect, and low footage in a single tunnel blasting. Therefore, at present, the main method of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/04F42D1/08F42D1/00
CPCF42D1/00F42D1/08F42D3/04
Inventor 陈雪峰赵孝学马浪张龙汪海波
Owner GUIZHOU HIGHWAY ENG GRP
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