Drill and blast method is one of the common tunnelling techniques in hard rock. The principle behind the blasting in tunnel is to create free face at the centre of tunnel by means of cut holes and then extending the blasting to full face of tunnel. In simple words, blasting relies on two main factors: 1. shock wave to create cracks in the rock 2. Expansion of gas to move into the cracks to crush the rock. You can learn all tunnelling techniques in our Online Tunnel Engineering course. Check the

Drill and blast method is one of the common tunnelling techniques in hard rock. The principle behind the blasting in tunnel is to create free face at the centre of tunnel by means of cut holes and then extending the blasting to full face of tunnel. In simple words, blasting relies on two main factors: 1. shock wave to create cracks in the rock 2. Expansion of gas to move into the cracks to crush the rock. #tunnelengineering #tunnelengineer #blasting #drillandblast #mechanizedtunnelling #blast #d

A blasting in tunnel. Drill and blast method is one of the most flexible tunnelling methods in hard rock. This method can be performed in wide variety of geological condition, in any tunnel shape and dimension. Design of the drill and blast pattern is an important part of this method. Ground borne vibration, air blast and fly rock are important factors that should be considered in the design along with more common parameters such as advance rate, powder factor, drill factor, maximum instantaneou

The drill and blast method is a key technique in mineral extraction, involving drilling holes into rock surfaces, loading them with explosives, and detonating to fragment the rock for extraction. It's highly effective in hard rock environments, enabling efficient mineral retrieval. Despite its efficacy, it requires meticulous planning and safety measures to minimise environmental impact and ensure worker safety. We have covered drill and blast technique in our online Tunnel Engineering course. C