Water-containing blast hole explosive charging device and method

Abstract

The invention discloses a water-containing blast hole explosive charging device. The water-containing blast hole explosive charging device comprises an explosive wrapping barrel and a sleeve arrangedon the periphery of the explosive wrapping barrel, wherein a plurality of sharp protrusions used for being inserted into explosive rolls to clamp the explosive rolls are arranged on the inner wall ofthe explosive wrapping barrel; weighting rings are arranged at an upper port and a lower port of the explosive wrapping barrel correspondingly; water inlet holes are uniformly distributed in the surface of the sleeve; a cavity between the sleeve and the wall of the explosive wrapping barrel is filled with a high-water-absorption polymer; and the explosive wrapping barrel is of a hinged structure.The invention further provides an explosive charging method based on the explosive charging device. The water-containing blast hole explosive charging device is low in cost and easy and convenient tooperate; the weighting rings guarantee that explosive charging at the hole bottom is in place and the adjacent explosive rolls make close contact, and explosive misfire of a water-containing section of a blast hole is avoided; the high-water-absorption polymer can absorb a large amount of water in the blast hole, and thus the amount of water in the blast hole is reduced; meanwhile, hydrogel is formed after the high-water-absorption polymer absorbs water and is saturated, and therefore hydrogel coupling explosive charging is formed, the energy utilization rate of the explosive at the bottom ofthe blast hole is increased, and the lower rock breaking effect is enhanced.

Description

technical field [0001] The invention relates to the technical field of engineering blasting, in particular to a charge device and charge method for a water-containing blast hole. Background technique [0002] Engineering blasting is widely used in the excavation of rock masses in water conservancy and hydropower, transportation, mining, municipal and other engineering constructions. During the blasting construction in the rainy season or near rivers, lakes and seas, a certain depth of water is often accumulated in the blast hole, and the water-containing blast hole has a significant impact on the charge quality at the bottom of the blast hole and the rock mass crushing effect at the bottom. The water in the blast hole is generally denser than the explosive due to the inclusion of rock debris and soil. It is difficult for the first section of the explosive roll in the blast hole to sink into the water and be loaded to the bottom of the hole, resulting in insufficient charge a...

AI Technical Summary

Problems solved by technology

The water in the blast hole is generally denser than the explosive due to the inclusion of rock debris and soil. It is difficult for the first section of the explosive roll in the blast hole to sink into the water and be loaded to the bottom of the hole, resulting in insufficient charge at the bottom of the blast hole and the rock mass The crushing effect is poor; in addition, the distance between two adjacent charge coils in the water-containing section in the blast hole is likely to exceed the detonation distance. cause blind shot

[0003] At present, the treatment measures for water-containing blastholes in the blasting construction site are mainly to use an air compressor to dry up the moisture in the blasthole, or use a detonating cord to connect the charge coil at the bottom of the blasthole. However, in many cases, the moisture in the blasthole is difficult to blow completely Dry, and the operation of connecting the air compressor and the detonating cord is cumbersome, and the construction is inconvenient

In addition, some new water-containing blast hole charge structures have also appeared at present, such as "a charge structure for water-containing blast hole blasting" disclosed in CN 209326480U and "a charge structure for water-containing blast hole blasting" disclosed in CN 207113736U. These methods have various degrees of cumbersome operation and cannot completely solve the problems of the impact of water in the hole on the charge quality and crushing effect at the bottom of the blast hole.

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