Water-injectable tunnel hydraulic blasting charge device, water injection device and water injection method

Abstract

The invention discloses a water-injectable tunnel hydraulic blasting charge device, which comprises: a columnar PVC pipe, which is used for axially placing in a blast hole. There are two water injection pipes, located on the left and right sides of the highest point of the first semi-circular arc shell; in each water injection pipe, and at the joint with the PVC pipe, there are a plurality of PVC pipes spaced apart along its length direction. The water injection through hole connected by the pipe. There are multiple water injection bags arranged in the PVC pipe at intervals along the length direction of the PVC pipe. The exhaust pipe is arranged axially on the outer wall of the first semi-arc shell; in the air pipe, at the joint with the PVC pipe, a plurality of exhaust pipes communicating with the water injection bag are spaced apart along its length direction. air vent. Explosives are multi-block, and the water injection bags are arranged in a staggered manner. By using the charge device, the charge and the water bag can be placed in the designed position in the blasthole at one time, and the water bag in the blasthole can be quickly filled with water, saving charge time and increasing the construction speed.

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] Hydraulic blasting can make use of the incompressibility of water, so that the explosion energy can be transferred to the surrounding rock through water without loss, which is conducive to the crushing of the surrounding rock and can reduce blasting dust. Therefore, hydraulic blasting is gradually applied to tunnel blasting construction. . At present, the main method of hydraulic blasting charge is as follows: the bottom of the hole is first filled with a water bag with a gun stick, and then the explosive and the water bag are filled with the gun stick according to the interval charging or non-interval charging. It is easy to cut the water bag due to the virtual ballast at the bottom of the blasthole...

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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