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Have you ever seen a pre-split in action? Pre-splitting is more than just a blast — it’s a controlled technique used to create a stable final wall, minimise overbreak, and protect the integrity of the pit design in opencast mining. Precision drilling, accurate spacing, and carefully calculated timing all come together to achieve a clean, controlled result. That’s how it’s done. At Botse Drill & Blast, we execute pre-split blasting with the accuracy and control required to support safe and effici
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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,
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The drill and blast method is one of the most widely used techniques for constructing tunnels in hard rock, where controlled drilling of blast holes, careful charging with explosives, and sequential detonation allow for efficient rock fragmentation and safe excavation. This method requires precise design and execution to minimise vibration, protect surrounding structures, and ensure stability, making it both a challenging and fascinating aspect of tunnelling. If you would like to gain a deeper u
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