A multi-density adjustable charge structure and method for pre-splitting blasting

Abstract

The invention provides a pre-splitting blasting multi-density adjustment charging structure, comprising at least one standard cylinder, the standard cylinder is a hollow structure with a cylinder bottom at both ends, and a through hole is formed on the bottom of one end of the cylinder; The standard cylinder is provided with a charge tube for charging powder, and the two ends of the charge tube are connected to the two ends of the standard tube, and one end of the charge tube is connected to the through hole; The circumferential direction of the inner wall of the charge tube is provided with a plurality of annular grooves for placing spacers; the standard cylinder is provided with two detonating cord holes parallel to and penetrating through the bottom of both ends of the standard cylinder, and the two detonating cords The holes are distributed symmetrically outside the charge tube, and all the standard cylinders are connected in series by a detonating cord passing through the detonating cord hole wrapping around the lowermost standard cylinder. The charge structure and method provided by the invention can realize the adjustment of the charge density, and at the same time avoid the problems of unsafe production process and harsh transportation and storage conditions due to the explosive being sealed into the structure in advance.

Description

technical field [0001] The invention relates to pre-splitting blasting in open-air step blasting, in particular to a multi-density-adjusted charge structure and method for pre-splitting blasting. Background technique [0002] In large-scale hydropower projects and open-air step blasting, pre-splitting blasting is often used to form slopes. In the existing pre-splitting blasting process, the charge coil and detonating cord are generally bound to bamboo chips, wooden sticks or other explosives. Charge on the rod, which often cannot ensure that the explosive roll is located in the center of the blast hole; at the same time, once the hole wall is in contact with the explosive roll during the downward process, the explosive roll may be damaged, affecting the construction accuracy and explosive quality. , It may even cause a safety hazard that some explosives are stuck on the hole wall and have not detonated. [0003] Due to the inability to adjust the charge density of some exis...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the pre-splitting blasting charge device in the prior art cannot adjust the charge density, and the safety cannot be guaranteed during production, and has high requirements for the transportation and storage of the device, one of the purposes of the present invention is to provide A charging structure and a safer pre-split blasting multi-density adjustment charging structure; the second purpose of the present invention is to provide a pre-split blasting multi-density adjustment with adjustable charge density and lower cost during the charging process Charging method

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