Reef blasting method in underwater complex geological condition

Abstract

The invention relates to a method for exploding underwater complex rock, especially be used in the condition that the rock is coated or the geometry is complex, wherein the invention uses high-pressure gas or high-pressure water to brush; the high-pressure gas or water via the through hole of driller will brush clear the coat and stone layer on the rock to expose the rock; the rotation head of driller drives the driller to designed depth, or using muffle following method, to arrange the combined drilling rod on the coat; the rotation head drives the central driller to the eccentric wheel, while the diameter of drill hole is larger than the diameter of muffle; the muffle and central driller are through the coat to drill to the designed depth; then taking out drilling rod or combined drilling rod away the muffle or outer muffle; and the explosive is poured into the muffle or outer muffle to the hole bottom; then drawing out the muffle or outer muffle to take out explosive line; the repeating drilling several explode holes; and starting explosion. The invention can improve the working efficiency and reduce cost without diver.

Description

technical field [0001] The invention relates to a method for blasting reefs, in particular to a method for blasting reefs under complicated underwater geological conditions or underwater complex geological reefs with covering layers on the reefs. Background technique [0002] At present, domestic underwater reef blasting mostly adopts two methods: [0003] 1. Underwater bare blasting, although the method is simple to operate, the blasting effect is poor, the consumption of chemicals is high, the blasting vibration, water and underwater shock waves are large, so it has a great impact on the water environment of the blasting reef area, and is affected by water flow and water depth. [0004] 2. Underwater drilling and blasting: Although the diameter and depth of this method are not limited, divers still need to complete underwater hole finding and charge blockage. Poor, difficult to operate, resulting in no holes, improper placement of explosives, and even damage to the gun de...

AI Technical Summary

Problems solved by technology

[0003] 1. Underwater exposed blasting, although the method is simple to operate, the blasting effect is poor, the consumption of chemicals is high, the blasting vibration, water and underwater shock waves are large, so it has a great impact on the water environment of the blasting reef area, and is affected by water flow and water depth

[0004] 2. Underwater drilling and blasting: Although the diameter and depth of this method are not limited, divers still need to complete underwater hole finding and charge blockage. Poor, difficult to operate, resulting in no holes found, improper placement of explosives, and even damage to the gun device, resulting in accidents such as missed or rejected explosions

[0006] Although this method has the advantages of charging and plugging without the need for divers to participate, it is difficult to form holes when encountering underwater reefs with a certain thickness of overburden, gravel layers, and interlayers inside the reef, and the work efficiency is very low. , because the casing is placed first, the bottom of the casing cannot pass through the thick covering layer and gravel layer to reach the surface of the reef, so that the covering layer and gravel on the reef are easy to fall into the hole when drilling, making it difficult to The drill pipe is stuck and the hole cannot be formed. Even if the drill bit makes a hole, after the drill is lifted, the covering layer near the hole, the covering gravel or sludge of the gravel layer or the interlayer gravel will collapse again, making it impossible to charge the charge Or the charge is not in place, which eventually leads to the embarrassing situation that it cannot be blasted or cannot meet the design requirements after blasting

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