The essence of down-hole drilling is to make the impactor dive into the hole during the drilling process to reduce the energy loss caused by the impact energy transmitted by the drill rod, thereby reducing the impact of the hole depth on the drilling efficiency.

The down-the-hole drill rig is an impact rotary drilling rig. Its internal structure is different from that of a general rock drill. Its gas distribution and piston reciprocating mechanism are independent, that is, an impactor. The rock dust generated during rock drilling is flushed out of the hole by the feng shui mixed gas. The mixed gas is injected into the impactor through the center of the drill pipe by the powder discharge mechanism, and then enters the bottom of the hole through the air groove on the cylinder of the impactor.

Domestic DTH drilling rigs were first produced by the Xuanhua region in Hebei in the 1950s. Through continuous national investment and their own development, the performance and technical content of drilling rigs have been greatly improved, and they have established a good reputation in the international market. Xuanhua JK Drilling is a large enterprise specializing in the development and production of various DTH drilling equipment. JK Drilling has established a mature and perfect after-sales service team, which can provide strong support for customers at home and abroad.