Joint-cutting carbon dioxide fracturing device and rock mass directional blasting method

Abstract

The embodiments of the invention provide a joint-cutting carbon dioxide fracturing device and a rock mass directional blasting method, and relates to the field of mine engineering blasting. The joint-cutting carbon dioxide fracturing device comprises a main pipe, a heating rod, a filling head and an adapter, the filling head is connected to the first end of the main pipe, the adapter is connected to the second end of the main pipe, and a first binding post is arranged on the adapter; a filling channel is arranged on the filling head, and a needle valve is arranged in the filling channel; the heating rod comprises a base and a paper tube arranged on the base, a hole channel is reserved in the base, a second binding post is arranged in the hole channel and extends into the paper tube, a threading hole is formed in the end, away from the base, of the paper tube, a wire axially arranged in the paper tube is arranged on the second binding post, and the wire is led out from the threading hole and is connected to the second binding post of the adapter; and a strip-shaped energy release sheet for directionally releasing energy is axially arranged on the inner wall of the main pipe, and cutting joints are further arranged on the side wall of the main pipe and correspond to the strip-shaped energy release sheet. Directional blasting of the rock mass is conveniently realized, so that the blasting effect is improved.

Description

technical field [0001] The invention relates to the field of mine engineering blasting, in particular to a slotted carbon dioxide cracker and a rock mass directional blasting method. Background technique [0002] The carbon dioxide cracker is a new type of blasting equipment, mainly used for breaking rocks, tunneling, coal falling, and pipeline dredging. Its principle is to use liquid carbon dioxide to gasify and expand, and quickly release high-pressure and high-energy gas. The volume can expand by more than 600 times. The release time is only 20-40ms, and then the blasting effect is achieved. Because of its high safety, convenience and quickness, and good blasting effect, it is widely used. [0003] At present, the rock directional fracture blasting technology is generally realized by blast hole cutting or slit pipe charges and other means. Among them, the operation of grooving the blast hole is difficult, and the control of the direction of the slit is relatively high, w...

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Problems solved by technology

Among them, the operation of grooving the blast hole is difficult, and the control of the direction of the slit is relatively high, which is not easy to realize. The slit charge package can solve this kind of problem very well, but the domestic control of explosives is relatively strict, and some areas obtain explosives It is more difficult. At the same time, for deep blastholes, the process of slotting charge is complicated when feeding the hole, and there are certain technical difficulties. These problems limit the use of slotting charge

In addition, conventional carbon dioxide crackers are not suitable for the application of directional fracture technology

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