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Well formation method adopting vertical shaft blasting for mines

A technology for shafts and mines, applied in the field of blasting shafts in mines, can solve the problems of large amount of engineering, large amount of charge in the initiation section, and difficult construction, and achieves reduction of entrapment effect, blasting vibration, and section charge. Effect

Active Publication Date: 2017-10-20
JINCHUAN GROUP LIMITED
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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.

Method used

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  • Well formation method adopting vertical shaft blasting for mines
  • Well formation method adopting vertical shaft blasting for mines

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Embodiment Construction

[0017] like figure 1 and figure 2 A mine shaft blasting well forming method is shown, which is characterized in that it comprises the following steps:

[0018] a. A cut hole area and a light explosion layer control hole area are set between the rock drilling roadway and the slag discharge roadway, the cut hole area is located in the light explosion layer control hole area, and the cut hole area is composed of four vertically arranged and It is composed of cut holes 1 arranged in a square shape, and the light explosion layer control hole area is composed of a plurality of vertically arranged light explosion layer control holes 2, and the light explosion layer control holes 2 are arranged circularly around the cut hole area ;

[0019] b. The charging operation is carried out in the cut hole and the control hole of the photoblast layer. The cut hole 1 adopts segmental interval coupling charging, and the charge packs 3 in the adjacent cut holes 1 are staggeredly distributed, an...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/08
CPCF42D1/08
Inventor 杨志强张鹏强李凤傅耀
Owner JINCHUAN GROUP LIMITED
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