EFFICIENT CUT BLASTING METHOD FOR MEDIUM-LENGTH HOLES IN DEEP HIGH-STRESS ROCK ROADWAY BASED ON CRUSTAL STRESS INDUCTION EFFECT
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United States of America Patent
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Issued Date -
Dec 28, 2023
app pub date -
Jun 27, 2023
filing date -
Jun 27, 2023
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Abstract
An efficient cut blasting method for medium-length holes in deep high-stress rock roadway is disclosed. The method may comprise steps of carrying out a crustal stress blasting test on the free face of the in-situ rock roadway to be excavated, and obtaining a distribution state of cracks under a synergistic action of crustal stress, explosion stress waves and clamping force of surrounding rock of a rock mass in the stratum where the in-situ rock roadway to be excavated is located; arranging a cutting hole net on the free face of the rock roadway to be excavated according to a distribution state of the cracks; performing cut blasting based on the cutting hole net.
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