![]() This method is ideal for drilling multiple holes in a short period of time, and less ideal for producing geological samples because the airblasting process can compromise the quality of the rock. ![]() Rotary air blasting is the most common shallow drilling method, in which a piston-driven hammer-like object drives the drill bit into the rock, fragmenting the hard surface into chips that are then lifted to the surface via compressed air. This kind of drill specializes as an initial geochemical reconnaissance technique, which means it is used in softer soil to find the optimal place to mount a larger drill. Once the auger drill is deep enough, the earth is lifted up by the blade of the screw. It involves the manual rotation of a helical screw into the ground, usually by two people although auger drills can also be mounted to small vehicles. ![]() Auger DrillingĪuger drilling is the simplest form of drilling. Whether it is for exploration, production, land-clearing or geotechnical purposes, there are drilling methods that serve every mining purpose. How many methods of drilling are there?Īs the mining industry advances and more excavating opportunities present themselves, the number of drilling methods increases. Drills have different mining functions, from providing geologists with different samples of soil for analysis to facilitating the extraction of precious minerals that would otherwise be difficult to reach.
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