Water injectable tunnel hydraulic blasting charging device, and water injecting device and method

Abstract

The invention discloses a water injectable tunnel hydraulic blasting charging device. The water injectable tunnel hydraulic blasting charging device comprises a cylindrical PVC tube for axial placement in a blast hole, two water injecting pipes, a plurality of water injecting bags, exhaust pipes and explosives. The two water injecting pipes are arranged on the left side and the right side of the highest part of a first semicircular arc shell; and a plurality of water injecting through holes communicating with the PVC pipe are formed at intervals in each water injecting pipe and the positions attaching the PVC pipe in the length direction of the PVC pipe. The water injecting bags are arranged in the PVC pipe and are arranged at intervals in the length direction of the PVC pipe. The exhaustpipes are arranged axially on the outer wall of the first semicircular arc shell; and a plurality of exhaust through holes communicating with the water injecting bags are formed at intervals in an airpipe and the positions attaching the PVC pipe in the length direction of the air pipe. The explosives are a plurality of blocks and arranged with water injecting bags in a staggered mode. With the charging device, the explosive charge and water bags can be placed in the design position of the blast hole at a time, the water injection of the water bags in the blast hole can be carried out quickly,the charge time is shortened, and the construction speed is improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of tunnel blasting construction, and in particular relates to a water-injectable tunnel hydraulic blasting charge device, a water injection device and a water injection method. 【Background technique】 [0002] Water pressure blasting can take advantage of the incompressibility of water, so that the explosion energy can pass through the water and then be transferred to the surrounding rock without loss, which is beneficial to the breaking of the surrounding rock and can reduce blasting dust. Therefore, hydraulic blasting is gradually applied to tunnel blasting construction. . At present, the charging method of hydraulic blasting is mainly as follows: the bottom of the hole is first filled with a roll of water bag with a gun stick, and then the gun stick is used to fill the explosives and water bag according to the interval charging or without interval loading. When pierced into the blasthole, the water bag ...

AI Technical Summary

Problems solved by technology

At present, the charging method of hydraulic blasting is mainly as follows: the bottom of the hole is first filled with a roll of water bag with a gun stick, and then the gun stick is used to fill the explosives and water bag according to the interval charging or without interval loading. When pierced into the blasthole, the water bag is easy to be cut due to the virtual ballast at the bottom of the blasthole and the small protrusions on the wall of the blasthole. The water bag and explosives are filled multiple times during the interval charging process, which increases the probability of water bag rupture and increases The charging time is determined, and the position of the explosive and the water bag is positioned according to the gun stick, there is a certain error, which affects the blasting effect

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