Well formation method adopting vertical shaft blasting for mines

Abstract

The invention belongs to the technical field of mining and blasting, and relates to a well formation method adopting a vertical shaft blasting for mines. According to the method disclosed by the invention, explosive charges in a cutting hole are detonated sequentially so as to produce inverted funnel structures which are overlapped to form a blasting hole free surface, and the explosive charges in blasting control holes are synchronously detonated so as to form the vertical shaft of mines; when the blasting effect is ensured, the segment explosive charge can be reduced, the blasting vibration and clamping effects are reduced, the height of well formation by once blasting is improved, and the construction quality and the construction efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of mining blasting, and relates to a mine vertical shaft blasting method. Background technique [0002] In the process of traditional shaft construction, the raised shaft construction method or the deep hole blasting construction method is generally adopted. The raised shaft construction method needs to construct a small-diameter slag well from the bottom up, and then expand the side to form a well from top to bottom. The amount of engineering is large, the construction is difficult, the progress is slow, and there are many unsafe factors; while the deep hole blasting construction method uses full-section drilling of deep holes and detonation in stages, usually with empty holes as the blasting free surface, although the well formation efficiency is low. However, the condition of the blasting free surface is poor, the amount of charge in the blasting section is large, the blasting vibration and clamping effec...

AI Technical Summary

Problems solved by technology

[0002] In the process of traditional shaft construction, the raised shaft construction method or the deep hole blasting construction method is generally adopted. The raised shaft construction method needs to construct a small-diameter slag well from the bottom up, and then expand the side to form a well from top to bottom. The amount of engineering is large, the construction is difficult, the progress is slow, and there are many unsafe factors; while the deep hole blasting construction method uses full-section drilling of deep holes and detonation in stages, usually with empty holes as the blasting free surface, although the well formation efficiency is low. However, the condition of the blasting free surface is poor, the amount of charge in the blasting section is large, the blasting vibration and clamping effect are obvious, the height of the well once completed is small, and the formation control of the well wall is difficult.

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