The drill and blast method in tunnelling involves drilling a series of holes in a precise pattern, then filling them with explosives to break and remove rock. The design of the drill and blast pattern is crucial, as it determines the effectiveness and safety of the operation. It factors in rock type, tunnel size, and desired fragmentation. Proper sequencing and timing of blasts are essential to minimise vibration, control overbreak, and maintain the tunnel's structural integrity. Follow us at tu
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The drill and blast method in tunnelling involves drilling a series of holes in a precise pattern, then filling them with explosives to break and remove rock. The design of the drill
tunnel.engineering. . The drill and blast method in tunnelling involves drilling a series of holes in a precise pattern, then filling them with explosives to break and remove rock. The design of the drill and blast pattern is crucial, as it determines the effectiveness and safety of the operation. It factors in rock type, tunnel size, and ...
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Blasting Design for Tunnels Tunnel Blasting Techniques
There are many methods of tunnel construction, each requiring specialist skills and equipment. These include techniques such as bored tunnels using Tunnel Boring Machines (TBMs), sprayed concrete lined tunnels, tunnels constructed by blasting with explosives, and tunnels constructed by pipejacking. This large variety means the tunnelling world and the skills it needs are constantly varied and challenging. #tunnelengineering #artoftunnelling #tunnel #tunnelengineeringisthefuture #tunnel #tunnelli
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There are many methods of tunnel construction, each requiring specialist skills and equipment. These include techniques such as bored tunnels using Tunnel Boring Machines (TBMs), sprayed concrete lined tunnels, tunnels constructed by blasting with explosives, and tunnels constructed by pipejacking. This large variety means the tunnelling world and the skills it needs are constantly varied and challenging. #tunnelengineering #artoftunnelling #tunnel #tunnelengineeringisthefuture #tunnel #tunnelli
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6.5K views · 104 reactions | Blasting techniques in rock tunnels...
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🚧 Tunnel Blasting Explained 🚧 In tunnel construction, blasting is one of the most critical steps. Unlike open-pit blasting, tunnels lack free surfaces for rock breakage — except at the tunnel face. 👉 The key is to first create an opening (a cut) at the center, giving surrounding blast holes a breaking surface. 👉 A big misconception: blasting damage can only be controlled with pre-splitting or smooth blasting. In reality, damage control starts much earlier with proper blast design. 👉 Poorly
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🚧 Tunnel Blasting Explained 🚧 In tunnel construction, blasting is one of the most critical steps. Unlike open-pit blasting, tunnels lack free surfaces for rock breakage — except at the tunnel face. 👉 The key is to first create an opening (a cut) at the center, giving surrounding blast holes a breaking surface. 👉 A big misconception: blasting damage can only be controlled with pre-splitting or smooth blasting. In reality, damage control starts much earlier with proper blast design. 👉 Poorly
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Different drill and blast patterns are employed in tunnels, and their design should be tailored to the specific conditions of the project. Factors such as the type of rock, geological features, tunnel dimensions, and intended use dictate the selection of the most suitable pattern. If you want to learn drill and blast method in tunnelling along with all other tunnelling methods register for our Online Tunnel Engineering course. Link in bio below https://www.tunnel.engineering/challenge-page/51f74
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