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 in mining is a critical method used to extract valuable materials from rock formations. It involves the use of explosives to break up large volumes of rock, making it easier to transport and process. The process begins by drilling holes into the rock, which are then loaded with explosives. When detonated, the explosives create fractures in the rock, allowing the material to be extracted more efficiently. The principles of blasting in mining and tunnelling are quite similar, as both rely

Covering blasting with blasting mats or soil helps control fly rock and air overpressure by containing the energy and debris generated during the blast. Blasting mats absorb and disperse the shockwave, reducing the likelihood of fly rock projectiles being ejected from the blast site. Additionally, soil cover acts as a barrier, absorbing energy and preventing the propagation of air overpressure waves beyond the blast area, thereby minimizing the impact on surrounding structures and environments.

18K views · 147 reactions | When blasting at the start of a tunnel or...