A hydraulic blasting construction method for rock tunnels with developed joints and fissures

Abstract

The invention discloses a hydraulic blasting construction method for a rock tunnel with developed joints and fissures, and relates to the technical field of tunnel blasting engineering. Rinse the inner wall; 3) Fill the energy-gathering tube with explosives at intervals; 4) Install the energy-gathering tube in the blast hole, use special mud to seal the blast hole, and reserve a water injection pipe; 5) Water injection, use the water injection pipe to fill the blast hole. Fill it with water; 6) Use plugging mud to seal the hole, and connect the detonation wire to detonate. Aiming at the development of rock mass with jointed fissures, it can block the jointed fissures on the inner wall of the blasthole and prevent the loss of water injected into the blasthole during the blasting preparation stage. The coupling medium water uniformly transfers the blasting energy to the rock, improving the coupling effect between the explosive and water , Improve the utilization rate of blastholes and blasting efficiency, reduce the amount of explosives used, and can reduce the dust concentration at the job site after blasting, improve the job site environment, and at the same time, the construction efficiency is high and the cost is low.

Description

technical field [0001] The invention relates to the technical field of tunnel blasting engineering, in particular to a hydraulic blasting construction method for a rock tunnel with developed joints and fissures. Background technique [0002] Tunnels are the key and key projects in the construction of highways and railways. With the continuous increase of infrastructure construction and the advancement of science and technology in my country, more and more tunnels are constructed by blasting. As a high-risk operation, blasting is inseparable from blasting technology in tunnel construction of highways and railways and mining of mineral resources. [0003] At present, hydraulic blasting is gradually popularized and applied in underground projects such as tunnels, but it is different from hydraulic blasting in the strict sense. In the prior art, when using emulsion explosives, water bags spaced apart and energy-gathering tubes for hydraulic blasting, the coupling effect betwee...

AI Technical Summary

Problems solved by technology

In the prior art, when emulsion explosives, water bags are arranged at intervals and energy-concentrating tubes are used for hydraulic blasting, the coupling effect of water and explosives is poor, and the superiority of hydraulic blasting technology cannot be fully reflected

[0004] In the prior art, when carrying out tunnel blasting construction, the traditional blasting method is adopted, the explosion energy transmission loss is large, the consumption of explosives is large, and the blasting effect cannot be fully exerted, and over-excavation and under-excavation are prone to occur. In addition, After detonation, the amount of dust is large, and a large amount of dust is generated to pollute the air, and the size of the blasted ballast is large, which makes the efficiency of ballast loading operation low, which makes the efficiency of tunnel construction low

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