Single-free-surface combined blast hole broaching blasting method
A technology of blasting and slotting, which is applied to the field of single-free-surface combined blasting slotting blasting, can solve the problems of large amount of charge in a single blasting section, adverse effects of surrounding rock mass and facilities and equipment, etc., to achieve blasting vibration reduction, reduce Blasting vibration effect, the effect that is conducive to rock crushing
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[0027] see Figure 1-3 , the figure shows the specific implementation of the single free surface combined blast hole slotting blasting method of the present invention.
[0028] Specific as figure 1 As shown, in this embodiment, six circles of combined blastholes are arranged in the groove blasting area. The arrangement steps of combined blastholes are as follows: firstly, a central blasthole 1-1 is set in the middle of the slotting blasting area, and a circle of four blastholes arranged in a square orientation is set around the center blasthole, and the above five blastholes form The first circle of combined blastholes 1; outside the first circle of combined blastholes 1, a circle of four blastholes arranged in a square orientation is set around the center blasthole 1-1 to form a second circle of combined blastholes 2; then Three circles of combined blastholes arranged in regular octagonal orientations are gradually set outward with the center blasthole 1-1 as the center, fo...
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