Energy-gathered cartridge device and roadway blasting forming method

Abstract

The embodiment of the invention discloses an energy-gathered cartridge device and a roadway blasting forming method, and relates to the technical field of rock drift blasting tunneling. The energy-gathered cartridge device comprises a tube shell, a first cutting seam and a second cutting seam are formed in the sidewall of the tube shell in the circumferential direction with an interval, the first cutting seam and the second cutting seam are asymmetrically arranged with respect to the central axis of the tube shell, connecting lines among the first cutting seam, the central axis of the tube shell and the second cutting seam are consistent with the contour of the top of the roadway in trend, or a first included angle formed by connecting lines among the first cutting seam, the central axis of the tube shell and the second cutting seam is consistent with the apex angle of the roadway. The blasting forming effect of the peripheral contour of the roadway can be improved. The device and method can be suitable for blasting tunneling projects of rock drifts with curved surfaces or folded surfaces, such as tunneling projects of straight-wall semicircular arch roadways and rectangular roadways.

Description

technical field [0001] The invention relates to the technical field of rock roadway blasting and excavation, in particular to an energy-gathering charge device and a roadway blasting forming method. Background technique [0002] In rock roadway excavation, blasting technology has been widely used. When the drilling and blasting method is used for construction, the traditional blasting method will inevitably cause over-excavation and under-excavation of the roadway section, which will affect the formation of the roadway. In severe cases, it will increase the density of surrounding rock. damage, and even adversely affect the stability of the roadway. [0003] In order to improve the surrounding formation of rock roadway blasting and control the blasting damage of surrounding rock mass, directional fracture blasting technology has become a key issue in the research of rock roadway blasting. The wide application of this technology has also produced good economic and social benef...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, in some traditional shaped charge device embodiments with multiple slits, such as at least two slits, the two slits are generally symmetrically arranged, and the line connecting the slit directions is 180°, which makes Not well suited for applications with broken line, curved, folded or surface blast forming control, such as contouring around arched or rectangular roadways

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