Framework for risk-based pillar design in underground mines

Important results from the project

The proposed framework for risk based pillar design in underground mines has been shown to be applicable for both the proof of concept and for the industry-provided mining cases. The scope of the work was fullfilled. The framework consists largely of probability-based design. The project thus enabled the application of probability-based design to be evaluated for mines. The design method used in the developed framework is applicable but is complex in nature and still at an academic level.

Expected long term effects

In the long term, the project contributes to a better basis for rock mechanic decision-making. In order to achieve a fully risk-based design, the mining companies´ own risk profile, i.e. the mining companies´ acceptable risk, needs to be determined. In the future, there will likely be needs linked to a risk-cost optimization in underground mining.

Approach and implementation

The project was implemented through six different work packages. The final product was as planned. Initially it was difficult to follow the time schedule due to was difficulties in deciding the information and data needed for the documented rock pillar cases. Once the cases were in place, we followed the time plan, activities and methods that we had planned for the project. Via project meetings, the status was presented and any revisions could easily be implemented.