Figure 9. Long-term crack displacement from April 2019 to November 2020 (1 mil = 25.4 μm). September 2020 was not captured due to a technical difficulty. Figure 10. (a) Scaler braking through to the open pit area; (b) inside the mine looking out to open pit; (c) portal is complete and open for haulage; (d, e) portals M13 and M15 after bolting and epoxy; (f) Steel canopies were installed for extra protection. 14 The Journal of Explosives Engineering July/August 2022