Percussion drilling is a method used to create holes in the ground by using a heavy drill bit that strikes the surface repeatedly. This technique is often employed in mining, geotechnical investigations, and construction projects. The drill bit is attached to a series of rods, and as the rods are raised and dropped, the bit breaks up the material below. This drilling method is effective for penetrating hard rock and can reach significant depths. It is typically faster than other drilling methods and can be used in various soil types. Percussion drilling is also known for its ability to provide samples of the subsurface material for analysis.