A slotted tube for smooth blasting interval charge

Abstract

The invention relates to a smooth blasting spaced loading joint-cutting pipe composed of loading parts and spacing parts. The loading parts and the spacing parts are sequentially and alternately arranged along the pipe length. The loading parts comprise cartridge containing grooves and cartridge covers fixed to the cartridge containing grooves in a free dismounting manner, and joints are arranged at the connecting positions of the cartridge containing grooves and the cartridge covers to form cut joints. A limiting component used for limiting cartridges to move in the pipe axial direction is arranged in the joint-cutting pipe. The spacing parts are of a pipe body structure, and the joint-cutting pipe is jointly formed by the spacing parts and the loading parts.

Description

technical field [0001] The invention relates to a peripheral eye-charged slit pipe used in the smooth blasting construction of railway tunnels and mine roadways, in particular to a new type of peripheral eye single-charge multi-point free detonation optical tube in smooth blasting. Surface blasting interval charge slit pipe. Background technique [0002] The difference in the effect of smooth surface blasting, the success of peripheral eye blasting is the key to the success of smooth surface blasting. The peripheral eye generally adopts the method of dense drilling and less charge to reduce the disturbance to the surrounding rock during smooth blasting construction and ensure the integrity of the surrounding rock. Generally, the peripheral eye with a certain size of extrapolation angle is used for smooth blasting to ensure the expected effect of the excavation contour. [0003] In the smooth blasting design plan commonly used in China, the parameter requirements and existi...

AI Technical Summary

Problems solved by technology

However, it is difficult to control the distance between charge intervals. Generally, during construction, blasting workers directly fill the charge rolls into the blast hole until the design charge amount of the blast hole is reached. In fact, the charge is continuous, and there is no separation distance between charge rolls.

This greatly reduces the design effectiveness of controlled blasting

[0005] 2. Peripheral eyes must have a certain extrapolation angle, where the parietal eye in the peripheral eye is inclined upwards

[0009] 1. It cannot fully meet the requirements of the peripheral eye interval charge in the design parameters of smooth blasting,

[0010] 2. It cannot meet the requirements of safe, convenient, accurate and free detonation methods, such as the requirements of intermediate detonation and reverse detonation, especially the reverse detonation charge is difficult and the risk factor is high, so it is rarely used in actual blasting construction.

Drilling holes constructed in broken rock mass, the traditional method of charging explosives in separate volumes, once hole collapse and blockage occurs during the charging process, it is difficult to deal with

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