(Solved): Design an underground rectangular tunnel drift, in a massive granitic rock with a UCS over 100MPa, ...

Design an underground rectangular tunnel drift, in a massive granitic rock with a UCS over 100MPa, of width: 2.7m, height: 3.8m, and length 13m, using an initial Burn-Cut method to create an extra surface for the next underground Bench-Blasting operation, where the idea is roughly illustrated in Figure A3-Q2. Sketch/draw, with correct scales, your tunnel excavation problem showing all the xy,yz and xz section views together with your staged drilled blast holes. Design your burn-cut and show your design schematically with all the firing charge and detonation time delay details. Design your bench blast and show your design schematically with all the firing charge and detonation time delay details. Calculate your staged rock volumes, tonnages, burn-out and bench blasting powder factors (PF) and the total rock volume and the average PF.