RE: Debt?27 Jul 2021 14:08
Reefles - I'll repeat my answer to Lee from last week.
You seem to be getting logic and logistics mixed up. Logically yes, mine the higher grade ore. Logistically stages 1 & 2 have to be mined first while stage 3 is getting prepped for mining now access is possible. The spoil from stage 3 is used to fill the pit created from mining stages 1 & 2. Yes stages 3 & 4 should have started mining by now but the plan has been changed due to the illegal miners and Covid-19 and the plan is to now start mining stage 3 in Q4 at the earliest. The illegal miners must be gone from stage 3 now because that stage is now being prepared for mining. That still takes time.
It would seem that they are not yet gone from stage 3 so no blasting of the area can take place to allow the ore to start to be mined.
Q2 2021 refers to stage 1 area now being back filled with waste from stage 2. So stage 2 has to be mined so that the waste from stage 3 can be back filled into the void created in stage 2.
The following is from the MTL website - Runruno is a conventional drill and blast open pit mining operation. The space available for waste dumps in the mine is constrained by the short strike length of the orebody and steep terrain. Consequently, the waste material from the pit is currently placed in ex-pit dumps, with the pit being developed to accommodate in-pit dumping to progressively fill the mining void.
Also - Mining improvements
The new management redesigned the pit to put in a cutback, to satisfy the required factor of safety for the pit walls. This increased waste movements and stripping ratios from the original designs, however this will ensure safe and stable operation of the pit till 2026.
In addition, the original mine design had major issues with the design of the mine access. As previously mentioned all the mined waste gets placed back in the Runruno pit and thus pit design is staged, where material from a following stage is place back into the pit void created from the previous stages. Previous design didn’t properly plan access ramps from one stage to another and without the redesign and proper sequencing the mine would have ended up being waste bound in 2021 and thus the production would get shut down. This has now been corrected with the redesign of the mine wide ramp system and the mine will become very efficient by Q4 2021 with the waste mined to be backfilled in the stage 1 pit void, thus decreasing the amount of trucks required in the pit, lowering the overall cost base.
Finally, there was a distinct lack of definition drilling and thus the understanding of the mine reserves going forward. This is being corrected with significant money spent on reserve drilling in 2020, with more to be expected in 2021. This will increase the confidence in the mine reserves in the stages 2 & 3, with further work required in stages 4 & 5, thus allowing for better forecasting and short and medium term mine planning.