Tunnel excavation water pressure blasting construction method

A technology of hydraulic blasting and construction method, which is applied in the direction of blasting, etc. It can solve the problems of not being able to fully exert the blasting effect, poor construction operation environment, and large chemical consumption, so as to improve energy utilization rate, increase excavation depth, and reduce time. Effect

Inactive Publication Date: 2019-01-04
中建桥梁有限公司 +1
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Problems solved by technology

And this method has the following disadvantages: (1) the amount of dust after detonation is large, resulting in poor construction work environment
(2) The consumption of chemicals is large, and the blasting effect cannot be fully exerted

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  • Tunnel excavation water pressure blasting construction method
  • Tunnel excavation water pressure blasting construction method
  • Tunnel excavation water pressure blasting construction method

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Embodiment Construction

[0022] In order to make the technical solution of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. The specific embodiment of the present invention is as follows.

[0023] A kind of tunnel excavation hydraulic blasting construction method of the present invention as shown in accompanying drawing, comprises the following steps:

[0024] (1) Determine the drilling depth according to the level of the surrounding rock, then drill the cut hole A in the center of the excavation surface, drill the auxiliary hole B along the cut hole outward on the excavation surface, and drill the bottom side hole C at the bottom of the excavation surface , drill peripheral holes D around the excavation face;

[0025] (2) Clean up each drill hole to remove stone chips, water and all other impurities;

[0026] (3) Install explosives and water bags in each drill hole, the specific steps are;

[0027] For the...

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Abstract

The invention discloses a tunnel excavation water pressure blasting construction method. The method comprises following steps that firstly, according to the surrounding rock classification, the drilling depth is determined, a cutting hole is drilled in the center of the excavation face, an auxiliary hole is drilled outwards in the excavation face along the cutting hole, a bottom side hole is drilled in the bottom of the excavation face, and periphery holes are drilled in the periphery of the excavation face; secondly, the interiors of the drilled holes are cleaned; thirdly, explosives, water bags and stemming are arranged in the drilled holes; and fourthly, a detonating tube or detonating cord is ignited for blasting. According to the method, the water bag is added, during blasting, the water wedge effect is generated, the energy use rate is improved, surrounding rock breaking is facilitated, and the explosive consumption amount is reduced; after blasting, water in blat holes can carryout atomizing so as to achieve dust falling, the ventilation dust falling time after blasting can be shortened, and the one-time excavation depth is improved.

Description

technical field [0001] The invention relates to a blasting construction method, in particular to a tunnel excavation hydraulic blasting construction method. Background technique [0002] At present, as my country's infrastructure construction continues to increase, more and more tunnels are constructed by blasting. And often adopt drill and blast method to excavate in common tunnel construction, common blasting method is to drill hole earlier, then pack explosives, detonator, then stop up blast hole, detonate at last. And this method has the following shortcoming: (1) the amount of dust after detonation is big, causes construction operation environment to be poor. (2) The consumption of chemicals is large, and the blasting effect cannot be fully exerted. Contents of the invention [0003] The object of the present invention is to overcome the shortcomings of the prior art, and provide a tunnel excavation hydraulic blasting construction method that reduces chemical consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/08F42D3/04
CPCF42D1/08F42D3/04
Inventor 郭坤杨毅辉李卫强韩猛彭建
Owner 中建桥梁有限公司
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