Long charging bag and method for charging blast holes through long charging bag

Abstract

The invention discloses a long charging bag. A zipper or a hook-and-loop fastener belt is installed on the bag body in the length direction. A plurality of hollow cylindrical partitions with one ends opened are arranged in the bag body. Each cylindrical partition is stitched through more than half of a circle of yarn thread or bonded or welded in the bag body. The long charging bag is used for charging the deep blast holes so that an explosive package can be prevented from being broken and deformed, accurate spaced charging and uncoupled charging can be achieved for downward blast holes or horizontal or slowly-inclined blast holes with two opened ends. The long charging bag can also be used for accurate charging of bent blast holes. The long charging bag is simple in structure, wide in usable material and capable of being easily used for large-batch industrial production and use. A construction method is wide in application range and capable of being widely used in engineering of demolition blasting, presplitting blasting, smooth blasting and underwater blasting, and the purpose of accurate charging of deep holes in the engineering is achieved.

Description

technical field [0001] The invention belongs to the field of blasting engineering, and in particular relates to a long charge bag and a method for charging a blasthole by using the long charge bag. Background technique [0002] In blasting engineering, the horizontal or gently inclined (slowly inclined means that the inclination angle of the blast hole is less than the angle at which the charge can slide into the blast hole by gravity) is a difficult problem, especially the need for interval charges and uncoupled charges In some cases, it is very difficult to construct accurately according to the drawings. For example, in urban demolition blasting, in order to reduce the harmful impact of blasting on the environment, spaced charges or uncoupled charges are often required along the axis of the beam or in deep holes arranged in mass concrete; In split blasting, in order to reduce vibration damage, over and under excavation, and blasting loose rings, interval charge or uncoupl...

AI Technical Summary

Problems solved by technology

Due to the small cross-sectional area of ​​the traction rope in this charging method, when the traction rope is tied to the medicine bag, no matter whether it is tied with silk thread or tape, the contact area is very small, and the friction force that can be provided is limited, and the medicine is prone to appear when dragging. Package displacement, it is difficult to ensure the accuracy of charge in deep holes

In the above two charging methods, during the charging process, the charge is in direct contact with the wall of the blast hole, and there is sliding friction when dragging. When the blast hole is curved or the hole wall is rough and the blast hole is deep, the charge package is easily damaged. , causing explosive leakage, leading to charge failure or charge inconsistent with the design, the result is often blasting failure or safety accidents

[0003] In soil and rock blasting, underwater blasting or demolition of reinforced concrete columns, for vertical or large inclination angles (large inclination angle means that the inclination angle of the blast hole is greater than the angle at which the charge can slide into the blast hole by gravity) It is also difficult to achieve accurate charging, especially when accurate uncoupled charging and interval charging are required, it is difficult to meet the design accuracy requirements

The traditional method of hoisting explosives (or spacers at the same time) into the blasthole piece by piece, or allowing the explosives (and spacers) to fall or slide into the blasthole by gravity can easily lead to different charges in the blasthole. The uneven distribution of the depth uncoupling coefficient is due to the fact that the explosives at different depths in the blast hole have different longitudinal and lateral deformations due to the different pressures they bear; similarly, the spacers at different depths in the blast hole will also have different deformations due to different pressures. Longitudinal and lateral deformation of the spacer makes it difficult to meet the accuracy requirements of the charge at intervals

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