How to determine the number of each hole in tunnel blasting design? I am doing my graduation project, and I have never understood this problem. There are few books and libraries about blasting!

I have been doing tunnel blasting for seven years. What size hole are you talking about?

Take the diversion tunnel of high-speed rail or hydropower station as the proportion. 6×6 tunnel of Shuangxi Township Hydropower Station in Chenggu County, Hanzhong City, Shaanxi Province, 1 There are 5 peripheral eyes on the left side, 2 peripheral auxiliary eyes, 4 auxiliary eyes for heartbreak and 4 auxiliary eyes for heartbreak. The right is the same as the left. 5 holes in the bottom plate, 65,438+05 holes in the periphery of 3 frames and vaults, 8 holes in 2 circles, 5 holes in 3 circles and 4 holes under vaults.

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