A single-stage deep-hole cut in soft rock for vibration-reducing flat-bottom light-explosion structure in tunnel
A tunnel and single-stage technology, applied in tunnels, blasting, mining equipment, etc., can solve the problems of poor self-stabilization of surrounding rock, less blasting footage, poor control of over- and under-excavation, etc., to increase footage, prolong rock breaking time, Effect of reducing blasting vibration
Active Publication Date: 2022-04-05
CHINA RAILWAY 18TH BUREAU GRP CO LTD
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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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[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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The invention discloses a single-stage deep hole cut in soft rock and a vibration-reducing flat-bottom light explosion structure in a tunnel. Several blastholes are arranged in the tunnel to be blasted, and explosives are arranged in the blastholes. The blastholes include peripheral holes, slotted holes, Cutting eye, auxiliary eye and bottom plate eye, the explosives of the continuous charge structure are all arranged in the said expansion hole, the said cutout eye, the said auxiliary eye and the said bottom plate eye, and the said peripheral eye is provided with a spacer Explosives with explosive structure, and each blast hole is blocked by blasting mud. The arrangement of each blasthole position in the present invention and the explosives of different structures arranged in each blasthole, the explosives are blocked in the blasthole by gun mud, so that the explosive stress and explosive gas of the explosive are blocked in the blasthole, the time for breaking rocks is prolonged, and the blasting effect is enhanced. The blasting energy utilization rate is improved, the footage is increased, the blasting vibration is reduced, the self-stabilizing ability of the 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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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