A mining project can look solid on paper and evolve very differently once work progresses.
The reason is simple: in the early stages, many decisions are still based on estimates. The deposit is only partially understood, costs can change, schedules can be extended, and certain constraints may only appear later.
The goal is not to eliminate every risk, but to identify which ones could truly affect the project.
An incomplete understanding of the deposit
The first risk comes from the subsurface itself.
Drilling provides a good understanding of a deposit, but it can never reveal everything. Between two data points, the continuity of mineralization must be interpreted.
Grades can vary, some zones may be thinner than expected, and geological structures can alter the geometry of the orebody.
The greater these uncertainties are, the more they can influence estimated resources and the future mine plan.
This is why a geological model should always be considered in relation to the quality of the data supporting it.
Ore that is more difficult to mine or process
Having ore is not enough.
It must also be possible to extract it and recover the metal under realistic operating conditions.
Rock quality, fractures, the presence of water, and mineralogical characteristics can all complicate operations.
Ore can also respond differently to processing depending on the area of the deposit.
These factors can lead to additional work, lower metal recovery, or require technical adjustments.
Costs that exceed expectations
The costs of a mining project evolve as studies become more detailed.
In the early stages, some expenses are still based on assumptions, including equipment, construction, energy, transportation, labour, and infrastructure.
The risk rarely comes from a single cost item.
More often, it is the accumulation of several differences that ends up having a significant impact on the budget.
A project that remains profitable only when every cost matches the original estimate has very little room to absorb unexpected expenses.
Delays that create additional problems
The schedule is also an important source of risk.
A delayed permit, late equipment delivery, or additional work can shift several stages of a project.
Each additional month can generate new costs before the mine has even started producing.
Delays can also affect financing and postpone the point at which the project begins generating revenue.
It is therefore important to allow some flexibility rather than build a schedule in which everything has to go exactly as planned.
Factors outside the company’s control
Some risks cannot be directly controlled.
Metal prices can change. Financing conditions can become more difficult. Regulatory requirements may evolve.
Issues related to land use, the environment, or communities may also require changes to the project.
Good planning should therefore assess how the project responds when conditions become less favourable.
Risks are often connected
This is probably one of the most important points to understand.
A geological issue can change the mine plan.
That change can increase costs.
Higher costs can create an additional need for financing.
Financing challenges can then delay the schedule.
A risk that seems relatively limited at first can therefore lead to several other consequences.
This is why risk analysis should not simply be a list of possible problems. It should show what could change within the project and what consequences those changes could create.
How can mining project risks be reduced?
It is impossible to eliminate every uncertainty.
However, the most important ones can be reduced before major financial decisions are made.
This includes improving geological data, carrying out representative testing, using realistic estimates, and regularly reviewing the assumptions behind the project.
One question can be especially useful:
What could most affect our decision if our current assumption turned out to be wrong?
The answer often helps determine where the next phase of work should be focused.
Understanding risk before moving forward
A strong mining project is not a project without risk.
It is a project where the main uncertainties are identified, understood, and taken into account before major investments are made.
As the quality of the data improves, decisions can be made with greater confidence.
P.J Lafleur Géo-Conseil supports mining and exploration companies with geological data analysis, interpretation, and mining project evaluation.
Contact P.J Lafleur Géo-Conseil to discuss your project.