MINE PLANNING BASICS TUESDAY - INTER-RAMP ANGLE vs CATCHBENCH!!
Ken Kuchling explains the relationship well in the diagram below. When given the IRA from the geotech engineers, you can calculate the width of the cathbench so that the IRA is still honoured. Click on the link below for Ken's pit wall angle calculator on his website: "http://kuchling.com/knowledge-base/"