JiaTiFeng

Targeted at the domestic market, YYG18U hydraulic rock drill has seen its main applications in hard rock drilling and construction such as tunnels and mines. Based on more than 2 years of using experience of YYG18U hydraulic rock drill from Epiroc, the paper covers the structure

In view of complex assembly of hydraulic rock drills that their cause of troubles and damage are numerous. The text as based on multi home made hydraulic rock drills in operation is going to introduce mainly the rotation types, impact types, water circulating types, air circulating types

The paper covers developmental conditions of hydraulic wheeled drilling rigs home and broad, their distribution as well as status of domestic and foreign manufactures. It focus on demands from users, discusses the pros and corns of the currently and predicts the developmental trends