Bidirectional shaped charge blasting charging structure with slotted sleeve

Abstract

The invention relates to a bidirectional shaped charge blasting charging structure with a slotted sleeve, and belongs to the technical field of explosive blasting. The bidirectional shaped charge blasting charging structure comprises a sleeve, a shaped charge liner and explosive, wherein the sleeve is arranged in a blast hole in an inserted mode, the shaped charge liner is coaxially arranged in the sleeve and is filled with the explosive; through kerfs are formed in the two sides of the sleeve in the axial direction; the center lines of the two kerfs are coplanar with the axis of the sleeve; the two sides, close to the kerfs, of the shaped charge liner are sunken inwards in a V shape to form a wedge-shaped shaped charge groove; and the outer side edge of the shaped charge liner is fixedlyconnected to the inner wall of the sleeve through an axial supporting partition plate. According to the bidirectional shaped charge blasting charging structure, detonation energy can be concentrated in the specific direction, the utilization rate of the explosion energy is increased, damage to rock mass in other directions is reduced, and a smooth wall surface is conveniently formed.

Description

technical field [0001] The invention relates to a slit tube bidirectional energy-gathering blasting charge structure, which belongs to the technical field of explosive blasting. Background technique [0002] In recent decades, with the rapid development of the country's economic construction, various large-scale underground rock mass projects are increasing; in the excavation and blasting of large-section tunnels, the quality of the wall directly affects the quality, progress and benefits of the project; When the internal explosion blasts the rock mass within the excavation range, it will inevitably cause damage and destruction to the retained rock mass, thereby deteriorating the mechanical properties of the retained rock mass, and the most direct manifestation of the damage to the retained rock mass is to cause over-excavation; [0003] The research of many experts and scholars has found that there are many defects in the principle of smooth blasting, which determine its sh...

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Problems solved by technology

[0003] The research of many experts and scholars has found that there are many defects in the principle of smooth blasting, which determine its shortcomings: the surrounding holes of smooth blasting use uncoupled charges to reduce the damage to the hole wall, thereby forming a relatively neat wall surface, However, this effect is not very obvious in soft rock formations with well-developed cracks; after blasting with uncoupled charges, the force around the hole wall is the same. In addition to forming ideal cracks, cracks will also be formed in other directions of the blast hole, making it difficult to form smooth the wall

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