porausräjähdys

Porausräjähdys, also known as drilling explosion or blast drilling, is a mining and construction technique that utilizes explosive charges placed in boreholes to break up rock. This method is commonly employed in open-pit mines, quarrying operations, and for tunneling projects where large volumes of rock need to be fragmented for subsequent removal. The process involves drilling a series of holes into the rock mass, into which explosive material is loaded and initiated. The controlled detonation of these charges creates stress waves that propagate through the rock, causing it to fracture and break apart.

The design of a porausräjähdys operation is crucial for achieving desired fragmentation and minimizing unwanted effects such as ground vibration and flyrock. Factors such as borehole diameter, spacing, depth, the type and amount of explosive used, and the initiation sequence are carefully calculated. The goal is to optimize the energy release to effectively break the rock while ensuring safety and minimizing environmental impact. Blast results are analyzed to refine future blasting patterns.

Porausräjähdys offers several advantages over other rock-breaking methods, including high efficiency in breaking large volumes of hard rock, cost-effectiveness for large-scale operations, and the ability to shape the rock mass as needed. However, it also requires strict safety protocols due to the inherent risks associated with handling explosives. The environmental impact, particularly noise and vibration, must also be managed through careful planning and execution.