Soft rock single-step deep hole slotting, vibration attenuation, bottom flattening and smooth blasting structure in tunnel

A tunnel and single-stage technology, applied in tunnels, blasting, mining equipment, etc., can solve problems such as poor control of overbreak and underbreak, small blasting footage, and poor self-stabilization of surrounding rock, so as to reduce blasting vibration and prolong rock breaking time , Improve the effect of footage

Active Publication Date: 2020-04-17
CHINA RAILWAY 18TH BUREAU GRP CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

In the existing technology, the blasting footage of soft rock is small, the control of overbreak and underbreak is poor, and the self-stabilization ability of surrounding rock is poor

Method used

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  • Soft rock single-step deep hole slotting, vibration attenuation, bottom flattening and smooth blasting structure in tunnel
  • Soft rock single-step deep hole slotting, vibration attenuation, bottom flattening and smooth blasting structure in tunnel
  • Soft rock single-step deep hole slotting, vibration attenuation, bottom flattening and smooth blasting structure in tunnel

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] The object of the present invention is to provide a single-stage deep hole cut in soft rock with a vibration-reducing flat-bottom light blasting structure to solve the problems in the prior art above, improve blasting energy utilization and footage, reduce blasting vibration, The self-stabilizing ability of the surrounding rock is improved, and the construction speed is greatly improved.

[0025] In order to make the above objects, features and advantag...

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Abstract

The invention discloses a soft rock single-step deep hole slotting, vibration attenuation, bottom flattening and smooth blasting structure in a tunnel. Multiple blast holes are formed in the tunnel tobe blasted, and explosives are arranged in the multiple blast holes. The blast holes include peripheral holes, groove expanding holes, slotting holes, auxiliary holes and bottom plate holes. The groove expanding holes, the slotting holes, the auxiliary holes and the bottom plate holes are internally provided with explosives of continuous loaded structures. Explosives of spaced loading structuresare arranged in the peripheral holes, and the blast holes are blocked through stemming. According to the soft rock single-step deep hole slotting, vibration attenuation, bottom flattening and smooth blasting structure in the tunnel, due to the arrangement of the positions of the blast holes and due to the fact that the explosives of the different structures are arranged in the blast holes, the explosives are blocked in the blast holes through the stemming, the explosive blasting stress and detonation gas are blocked in the blast holes, the rock breaking time is prolonged, the blasting energy utilization rate is increased, the footage is increased, the blasting vibration is reduced, the self-stabilization capability of surrounding rock is improved, and the construction speed is greatly increased.

Description

technical field [0001] The invention relates to the technical field of soft rock blasting, in particular to a single-stage deep hole cut in soft rock in a tunnel for vibration reduction and flat-bottom light blasting structure. Background technique [0002] During the construction of the high-speed railway double-track tunnel, the construction is organized in two work areas: the entrance and the exit, and the entrance work area and the exit work area are respectively responsible for a section of the main tunnel. The three-step synchronous drilling and blasting method is used for construction, and the quality of cutting and light blasting on the upper step is the key to determining the tunnel excavation footage and the effect of over- and under-excavation. In the prior art, the blasting footage of soft rock is small, the control of overbreak and underbreak is poor, and the self-stabilization ability of surrounding rock is poor. Contents of the invention [0003] The object...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D1/08F42D3/04E21D9/00
CPCF42D1/00F42D1/08F42D3/04E21D9/006
Inventor 刘飞香张馨
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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