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67K views · 750 reactions | Underground Drilling and Blastin…
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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 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 serie…
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Facebooktunnel.engineering
The drill and blast method is a widely used technique in tunnel construction, especially in hard rock environments. This method involves drilling a series of holes into the rock face, filling them with explosives, and then detonating them to break the rock into manageable pieces. After blasting, the debris, known as muck, is removed. Drill and blast is favoured for its effectiveness in excavating through tough geological conditions, but it requires precise planning and control to minimise vibrat
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The drill and blast method is a widely used technique in tunnel c…
31.4K viewsAug 26, 2024
Facebooktunnel.engineering
When blasting at the start of a tunnel or in a portal, several safety measures must be taken to control flyrock and ensure the safety of workers and equipment. First, accurate pre-blast assessments should be conducted to determine the optimal amount of explosive and the correct delay timing to minimise excessive rock movement. Proper confinement techniques, such as adequate stemming and using blast mats or protective barriers, should be employed to contain the blast and prevent flyrock based on
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When blasting at the start of a tunnel or in a portal, several safet…
9.6K viewsSep 6, 2024
Facebooktunnel.engineering
Blasting in mining and tunnelling involves the use of explosives to break rock and excavate materials. In mining, blasting is primarily used to fragment rock to extract valuable minerals, often requiring precise control to maximise ore recovery while minimising dilution and damage to the surrounding rock. In tunnelling, the primary objective of blasting is to create underground passages and spaces, necessitating careful design to ensure stability and safety of the tunnel structure. While both ap
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Blasting in mining and tunnelling involves the use of explosives to …
22.1K viewsJun 18, 2024
Facebooktunnel.engineering
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