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The document discusses rock perforation and blasting. It defines rock perforation as drilling cylindrical holes in rock to hold explosives using mechanical percussion and rotation. This fractures the rock in an area equivalent to the drill diameter and depth. Perforation methods include percussion, percussion-rotation, and rotation. Common rock drilling machines include air hammers, track drills, hydraulic jumbos, and diamond-tipped machines for exploration. Drill bits come in various designs to cut differe

Author

Goes Angel

Language

EN