Haas, "Analysis of rock
bolting to prevent shear movement in fractured ground," Minerals Engineering, vol.
The mechanical interaction mechanism among steel tube, bonding material, and bolt is drawn in Figure 3; for a specific segment taken from the
bolting system, it always keeps axial mechanical equilibrium, which means that the overall resultant force applied on the upper end equals that of the lower end.
That has led a group of engineers to form the
Bolting Technology Council, based in New York City, "to sponsor research, to collect and exchange information, and to do whatever else is required to reduce the uncertainties of assembly results."
Although many are still installed manually, mines are coming to appreciate that fully mechanised rock
bolting gives reliable good quality, efficiency and greater safety.