rock support
ESTIMATES OF ROCK SUPPORT IN UNDERGROUND OPENINGS
The parameters and principles for estimating rock support are shown in the figure below.
Figure showing the principles of and the parameters in the RMi support method (Sr = size ratio, Gc = ground condition factor, Cg = competency of the ground)
(click on the figure to enlarge it)
The RMi rock support method is described in the following papers: Some practical applications of the Rock Mass index (RMi), which is based on the original support method described in the Ph.D. thesis by Dr. Palmström. Later, some developments and improvements of the RMi rock support method have been made in the published paper Recent developments in rock support estimates by the RMi where some improvements and simplifications are shown.
The amount of rock support can be estimated using the support diagrams presented in this paper. Another way to estimate rock support is applying computer spreadsheets. The special sheet RMi rock support-3.1 is developed to quickly estimate the support according to the RMi support method. Hints on how to use the spreadsheet are included, and limits of the method are indicated.
The parameters and principles for estimating rock support are shown in the figure below.
Figure showing the principles of and the parameters in the RMi support method (Sr = size ratio, Gc = ground condition factor, Cg = competency of the ground)
(click on the figure to enlarge it)
The RMi rock support method is described in the following papers: Some practical applications of the Rock Mass index (RMi), which is based on the original support method described in the Ph.D. thesis by Dr. Palmström. Later, some developments and improvements of the RMi rock support method have been made in the published paper Recent developments in rock support estimates by the RMi where some improvements and simplifications are shown.
The amount of rock support can be estimated using the support diagrams presented in this paper. Another way to estimate rock support is applying computer spreadsheets. The special sheet RMi rock support-3.1 is developed to quickly estimate the support according to the RMi support method. Hints on how to use the spreadsheet are included, and limits of the method are indicated.
