A spiral energy-gathering type undercut grain shell
An energy-gathering, cylindrical technology that is applied to weapon accessories, blasting barrels, offensive equipment, etc., can solve the problem of single rock clamping on the free surface, improve the blasting effect of cutting, increase the cycle footage, and improve the rock-breaking ability Effect
Inactive Publication Date: 2016-08-17
ANHUI UNIV OF SCI & TECH
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Problems solved by technology
[0003] In order to overcome the unfavorable factors such as the single free surface and the rock clamping effect in the current cutting blasting, the invention provides a spiral energy-gathering type cutting charge shell
Method used
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[0020] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:
[0021] A spiral energy-gathering type grooved drug column shell, including three main parts: a sealed top cover (1), a drug column body (2), and a sealed bottom cover (3). The positional relationship in the figure;
[0022] The sealing top cover (1) is a concave plastic cover, with two tower grooves on the inner wall of the cover, two tower protrusions on the outer wall, the bottom is hemispherical, directly covered on the medicine cylinder (2) upper part;
[0023] The medicine cylinder (2) is a cylindrical cavity rod made of PVC material, with triangular spiral grooves (4) distributed on the rod, the cross-sectional shape of the groove is triangular, and the diameter of the rod containing the triangular spiral groove is less than Incl...
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The invention discloses a spiral energy-gathering type slotting explosive column casing. The spiral energy-gathering type slotting explosive column casing comprises a capping cover, an explosive body and a sealing bottom cover, and is mainly used for slotting explosion. A triangular spiral groove is formed in the cylindrical explosive column, when the explosive column is exploded, rocks, in the triangular spiral groove, on the explosive column form fissure surfaces in the groove region under the action of energy-gathering detonation metal flow, the length of rock cracks can be further increased under the action of subsequent blast hole explosion for crushing rocks within a groove cavity range and throwing the rocks out of the groove cavity, so that the slotting explosion effect can be improved; moreover, the two sections of the explosive columns can be quickly connected through the tower-type design of the top and the tail, so that the explosives can be saved more in comparison with the conventional explosive column with the same length and diameter.
Description
technical field [0001] The invention relates to a grain shell, in particular to a spiral energy-gathering type cut grain shell. Background technique [0002] There are two unfavorable factors in cutting blasting: one is that the free surface is single, and the volume of the rock expands during the crushing process, and the single free surface cannot provide sufficient expansion space, which is the main reason for the poor cutting effect; Clamping effect, as the mining depth increases, the clamping effect between rock blocks in cut blasting increases significantly, which is another unfavorable factor of cut blasting. At present, a series of research work has been carried out in order to realize the rapid excavation of rock tunnels, which has improved the circular footage to a certain extent, but the research on how to overcome the unfavorable factors in the cutting blasting and improve the utilization rate of blastholes is not deep enough. Aspect blasting charge, just urgent...
Claims
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IPC IPC(8): F42B3/00
Inventor 郑志涛徐颖
Owner ANHUI UNIV OF SCI & TECH