The drilling and blasting method is widely used in tunnelling, where holes are drilled, filled with explosives, and detonated to break through hard rock. To deepen your understanding of this and other tunnelling techniques, register for our Online Tunnel Engineering course and advance your skills today! 👇 https://tunnel.engineering/register/tunnel-engineering-course/ Video credit: IG ibo.telli #Tunneling #Engineering #DrillingAndBlasting #TunnelConstruction #CivilEngineering #Underground #RockE

Controlled Blasting Controlled blasting techniques are used to efficiently distribute explosive charges in a rock mass, thereby minimizing the fracturing of rock beyond the crestline of the highwall or designed boundary of main excavation areas. Such over-fracturing, commonly called overbreak, is typically more of a problem in soft or unconsolidated, incompetent overburden formations. There are several techniques that a blaster can use to minimize overbreak, but trials should be conducted to det

Pre-splitting blasting technique is a method employed in rock excavation to create a fracture plane ahead of the main blasting zone. It involves drilling a line of closely spaced holes along the desired contour, typically using smaller diameter drill bits. These holes are then charged with explosives, but the detonation sequence is carefully controlled to ensure that the fractures propagate smoothly and evenly along the designated plane. Pre-splitting helps in achieving a smooth excavation face,