Fundamentals of drilling and blasting in open cast mining, covering the key concepts, practices, and principles:1. IntroductionDrilling and blasting are essential operations in open-cast mining… | Sudam Behera
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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 is a widely used technique in mining operations, particularly in hard rock mining. This process involves two key components: drilling holes into the rock formation and subsequently blasting the rock to facilitate its fragmentation. Drill patterns are meticulously designed to optimise the blasting process, considering factors like rock type, size, and desired fragmentation. The drilling phase utilises specialised equipment to bore holes into the rock, where explosives a
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Principle of Rock Fracturing During Blasting Rock fracturing during blasting is the process of breaking rock into smaller pieces using explosive energy (Sanchidrián et al., 2007). When explosives are detonated in drilled blast holes, the stored energy creates high-pressure shock waves that travel through the rock, causing it to fracture. The mechanism of rock fracturing can be broken down into three key phases: 1. Shock Wave Generation When the explosive charge is detonated, a rapid chemical rea
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