Rotary boring works on the principle of using a rotating drill bit to cut through the soil or rock, with the cuttings being removed by a drilling fluid. The rotation of the drill bit creates a borehole, allowing for the collection of soil or rock samples. The mechanism of rotary boring involves the use of a drill rig, drill pipe, and drill bit, which work together to create the borehole.

For competitive exams, it is essential to understand the different types of boring methods and their applications, as well as the principles and mechanisms involved in each method.