This paper describes the development and testing of the Ramex excavation system. Incorporating a synergy of low-velocity, high- energy impact and kerf cutting, this machine offers a competitive alternative to drilling and blasting in hard rock. It is a boom mining machine that incorporates the features of a lightweight roadheader, and it can mine nearly any shape opening in hard rock. The ramex tunneler has been developed to satisfy industry demands for a non-explosive, flexible, continuous, and rapid underground rock excavation system. It will produce minimum ground vibration in the urban environment and allow the flexibility necessary for thin- seam mining conditions. It will also reduce initial ground support costs and has a minimum impact on rock integrity. Developed by ramex systems with cooperative research provided by the U.S. Bureau of Mines, this system could produce the next step in the continuing evolution of mechanical mining systems.
1989 Rapid Excavation and Tunneling Conf., Los Angeles, California, PP. 769- 787