microwave drill to bore hard "rocks" Now Microwave which was once used to cook food and grill the chicken will be used to cook rocks beneath the soil so that speed of drilling the ground could drastically increase.....
drilling through the soft ground is very easy and once we reach a hard rock such as basalt or granite drilling speed dramatically decreases because slow cutting speed of the increased rate at which drill bit wears out....One way to speed up drilling would be to heat up the rock ahead, causing it to crack. Engineers have attempted to do this using gas jets, lasers and even electric heaters, but with little success, says Jacques Ouelett, a mining engineer at McGill University in Montreal, Quebec, Canada. Instead, he suggests fitting a drilling head with a low energy microwave generator to heat rock just ahead of the drill bit. This fractures the rock efficiently making it much easier to cut and reduces the wear on the drill bit.
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