Hybrid from SwellexThe newly- announced Swellex Hybrid rockbolt combines the pre-tensioning capabilities of Swellex with the grouting convenience of MAI SDA to provide immediate, long-term support. A special connection coupling enables the Swellex bolt to be inflated through the hollow-core MAI SDA, and grout is then pumped in to fill the remaining annulus. Hybrid rockbolts are recommended for a range of applications, particularly in situations where both active support is required to preserve rock mass structure, and grouting is needed for extended life. The system is ideal in weak ground with structural discontinuities, and where long anchors are required. More from www.rockreinforcement.com 14/04.