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

Blasting is a highly skilled process that, when properly designed and executed, can be safely used for rock excavation even in sensitive areas such as around residential buildings. By employing controlled blasting techniques, blasting operations can minimise ground vibration and air overpressure and ensure the safety of nearby structures. The use of blasting mats further enhances control by effectively containing fly rock. With careful planning and expert execution, blasting becomes a versatile