DTH (Down-the-Hole) drilling and rotary drilling are two common methods used for drilling boreholes. DTH drilling uses a hammer located at the drill bit to deliver high-impact force, allowing it to break through hard rock formations efficiently. This method is typically used in situations where precision and depth are important.
Rotary drilling involves the use of a rotating drill bit that grinds and cuts through the earth as it advances. It is more versatile and can be used in a variety of ground conditions, including soft and hard formations. Both methods are widely employed in groundwater exploration, mining, and construction projects.