> I remember some years ago how a guy use to drill a hole in the rock and then
> put a soldering iron (yes). The heat from the iron make cracks in the rocks,
> cracks big enough to take the rock apart. I never tried it but believe it may
> work. Worth a try.
> 73 de,
> Hans - N2JFS
For several thousand years man has cracked rock by fire setting.
There is a copper mine here where man was working at -100 feet and
carbon dating shows circa -4000 years.
The technique was to dig down vertically to the rock then a dig
ventilation level , fill with wood, drop burning bracken and heather
down the shaft and let it go. At some stage the ventilation level was
sealed and water poured into the hole.
I have seen the enormous fractures created by this technique and have to
say it compares favourably with the PE we used for cave exploration.
73 de Paul GW8IZR IO73TI
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