In-hole micro difference blasting method performing punching in upward direction of medium-deep hole and explosive charging in downward direction of medium-deep hole

Abstract

The invention belongs to the technical field of metal mines and particularly relates to an in-hole micro difference blasting method performing punching in the upward direction of a medium-deep hole and explosive charging in the downward direction of the medium-deep hole. The medium-deep hole is drilled from a lower segment to an upper segment, and communicating with the upper segment is achieved;a blast hole port plug is plugged in a lower hole of a blast hole, blocking stemming is contained in, and hole plugging of a lower hole port is completed; due to the method that a plurality of segments of detonating bombs and bulk explosive are arranged in the blast hole, and the plugging stemming is used in the blast hole to perform multi-segment blasting, the technical problem for achieving in-hole micro difference blasting during medium-deep hole blasting operation under a mine is solved; by means of the method, in-hole micro difference blasting with punching in the upward direction of themedium-deep hole and explosive charging in the downward direction of the medium-deep hole can be achieved, in medium-deep hole blasting simultaneous shaft-sinking, the explosive charging efficiency isimproved, the blasting effect is also guaranteed, and successful blasting shaft-sinking is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of metal mines, and in particular relates to an in-hole micro-difference blasting method for drilling upwards and downwards for middle and deep holes. Background technique [0002] In the field of metal mining, medium and deep hole blasting technology has been widely used, and it is mainly used in the stope mining of thick and large ore bodies. At present, more and more mines adopt medium and deep hole blasting one-time well-forming technology in the excavation of the raised shaft. It is difficult to realize the micro-differential blasting in the hole in the blasting of the upward hole. powder, or fix the powder coil on the bamboo pole and send it to the blasthole to realize the charge at intervals in the hole, but the effect is not ideal in the actual blasting. Moreover, it will also affect the blasting effect, damage the surrounding blastholes, and cause serious over- and under-excavation phenomena; if th...

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Problems solved by technology

[0003] In order to overcome the above-mentioned problems, the present invention provides a micro-differential blasting method in the middle and deep holes, which is drilled upwards and charged downwards. By drilling upwards in the lower section, after connecting with the upper section, and then from the upper section to the Bottom charge, there is a corresponding working space in the upper and lower sections, to solve the technical problem of realizing micro-difference blasting in the medium and deep hole blasting operation in the mine, through this method, the middle and deep holes can be drilled upward and charged downward Micro-differential blasting in the hole, in the blasting of medium and deep holes, it not only improves the charge efficiency, but also ensures the blasting effect, ensuring the success of blasting into the well

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