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
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[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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