环形钻架是由长沙矿山研究院、铜陵有色井巷公司、阜新矿业学院和甘肃省煤炭第一工程处共同研制,于1975年11月经国家鉴定推广使用的。几年来,在我国冶金矿山、铁道和军工的竖井掘进中获得了广泛的应用。环形钻架配合HK型靠壁式液压抓岩机(或HH-6型环轨式抓岩机)、及竖井掘进机械化作业线的其它配套设备,在竖井施工中取 Ring drilling rig by the Changsha Institute of Mining, Tongling colored well Lane Company, Fuxin Mining Institute and Gansu Coal Engineering Co-developed jointly in November 1975 by the national identification of the promotion and use. In recent years, China’s metallurgical mines, railways and military shaft excavation has been widely used. Ring drilling rig with HK-type wall hydraulic grabs (or HH-6-type ring rail grabs), and vertical shaft mechanization of the operating line of other ancillary equipment, taken in the construction of the shaft