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by JusticeJuice
467 days ago
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It's really really hard to 'aim' a 6km deep hole. Hitting a slab of tough rock can deflect the drillbit off course. If you remember the Chilean miner rescue in 2010, who got rescued by a new hole being drilled - they had 3 seperate holes being drilled at the same time as backups, just because they were worried about the success rate of actually hitting their target. And that was only 0.7km underground. |
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