• Descent 310 is out now.

    ....so prepare to see some of the best writing and photography from the caving world

    Including: Into the Echo Chamber, Tim Allen reports on another magnificent Yorkshire Dales find by the Space Miners....and: The Great Geoff Yeadon, undoubtedly one of the greats of the caving world. Following his death at the age of 75, Geoff Crossley, Martin Grass and Mick Nunwick pay tribute to him.

    Click here for details of this edition

For interest another way of demolishing boulders etc

I've seen this stuff in action too. It requires large holes (over an inch diameter) and the kit which goes in the hole is bulky (by caving standards at least). It arguably has its place in civil engineering applications but there are plenty of better alternatives for caving.

Nick.
 
As I suspected NIck! The guy who told me about it didn't give enough detail. I just thought it was an interesting approach.
 
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