Stress and Seismicity (Part 1) – with Tom Parrott from Entech

Welcome to a special dedicated episode on Underground Stress and Seismicity. There is no better man to give some expert insight into this than Tom Parrott, Principal Geotechnical Engineer at Entech. In this Part 1 of 2 discussion, we cover:

• What are the differences between stress, seismicity, and convergence?
• What ground conditions and types induce high seismicity.
• How can mines in South Africa go to 4,000m deep where Australian mines struggle to reach 2,000m?
• Why is the Kambalda region a known Seismic area?
• Block Cave vs Sub-level Cave stresses (where they are and why are they there?)
• Meshing of development faces, should it be across the board or only in high stress areas?

Make sure you head on to Part 2 to hear about:

• Block Caves and Sub-level Caves continued.
• Why did Argyle have so much ground convergence?
• What controls stress better, Sub-level Cave or Block Cave?
• Using the Kambalda North mine as an example, can you predict stress for new developments in virgin ground?
• How do you measure the principal stress directions for any underground mine?
• Ideal mining sequence to control stress.
• Consequences of skipping a level and starting a 2^nd mining front to make budget.
• Shotcrete and mesh combinations for high stress areas.

Give Tom Parrott and Entech both a follow on LinkedIn

Ground Support episode – https://youtu.be/-uB_w1hNgrM

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