Further Thoughts on Maximum Pressures for Rock Grouting and Lugeon WPT-Video

Video Transcription

Video Summary

The speaker argues that grouting pressure should be based on site-specific rock and fissure conditions, rather than relying on rules of thumb such as 1 psi per foot or 1 bar per meter. Real-time monitoring and computer-controlled pumps could adjust pressure by stage, improve borehole efficiency, and stop automatically when signs of hydrofracturing or hydrojacking appear, with an operator providing oversight. Water pressure tests should also be set using hydraulic considerations—not simply matched to grouting pressure—since test results do not directly correlate with grout take. The talk invites the industry to adopt a more evidence-based, technology-driven approach.

Keywords

grouting pressure

rock fissure conditions

real-time monitoring

hydraulic pressure tests

hydrofracturing