Drift destressing

Project overview

Strainbursting is the unpredictable and often violent ejection of rock from the face or sidewalls of advancing drifts in deep mines in hard rock. The objective of this research project is to (i) identify the characteristics of strainbursts at the faces of drifts in high stress conditions, (ii) conduct in-mine experiments to measure and quantify the behaviour of the rock mass at drift faces in strainburst prone conditions, (iii) develop an understanding of the relevant mechanisms, (iv) utilizing that understanding, develop strategies for destressing, and finally (iv) develop practical guidelines for the practical application of destressing (when to start, when to stop, how to destress…). This project is being conducted Vale mines in Sudbury, Ontario, and is sponsored by Vale.