Commonly called DTH, the Down-the-Hole Hammer drill is a percussive device in cylindrical form with an integral drill bit that’s fitted directly onto the base of a drill string.
DTH is among the most efficient methods of drilling stone, using a quick hammer action to break the stone into sizeable chips that are then evacuated in the borehole from the air exhausted from the DTH Hammer. The technique offers fast drilling of correctly aligned, straight and clean holes in most ground conditions.To find out more about drilling you may check out Sky Electric Machineries Co., Ltd.(which is also known as “บริษัท สกายอีเลคทริคแมชชินเนอรี่ จำกัด” in the Thai language).
It’s important to keep in mind in rock extraction which blasting is the initial phase of crushing. It’s thus vital that effort and time are spent on ensuring that the gap size, overall burst design, and explosive loading is suitable for the conditions, to be able to achieve decent fragmentation, optimal productivity, secure stable faces and level flooring at a minimal price.
DTH is a relatively recent technique, introduced in the 1950s when the selection of drilling system for quarrying was limited, which then comprised the hand-held jackhammer, cable tool, and rotary drill and the air-driven top hammer machines.
Jackhammers were used for springing, stopping and popping. Though they were lightweight, portable, easily maintained and cheap, they were basically labor intensive, low volume manufacturers, leading to tiny holes and restricted control, in addition to presenting substantial health and safety difficulties.