iron ore rotary drilling
drilling blasts iron ore Mines Visit – Mining and Blasting. Kiruna Underground Iron Ore Mine, Sweden. Mining the ventilation shafts for the current production level was carried out by SIAB using Indau 500 raise borers, while Skanska Raise Drilling developed a total of 32 ore passes between the 775 and 1,045m levels using Tamrock and Robbins raise borers.