equipment used for drilling and blasting
equipment used for drilling and blasting,Drilling and blasting - WikipediaDrilling and Blasting is the controlled use of explosives and other methods such as gas . Higher velocity explosives are used for relatively hard rock in order to shatter and break the rock, while low velocity . Before the advent of tunnel boring machines, drilling and blasting was the only economical way of excavating long.equipment used for drilling and blasting,Drilling equipments - SlideShareApr 27, 2016 . Drilling equipment and methods are used by the construction and .. bits (rarely used for blast-hle drilling) Percussive Drilling Piston drills (now.Drilling and Equipment Technology in Mining | Drilling Equipment .The type of drill bit used in the mining industry is dependent on the type of . drill consumables as drillrods, subsavers & associated equipment for blast hole.