| 1. | The deepest borehole in the world is Kola Superdeep Borehole at.
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| 2. | The deepest borehole in the world is Kola Superdeep Borehole at.
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| 3. | Borehole mining is applied from vertical, horizontal and deviated wells.
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| 4. | Brine is extracted by dropping a long tube down the borehole.
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| 5. | The miners of Zigong refined the techniques of deep borehole drilling.
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| 6. | Winters were spent collecting borehole and quarry information in the Lothians.
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| 7. | However, they struggle to dig the borehole, with Balan collapsing.
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| 8. | The deep borehole concept can be applied to any amount of waste.
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| 9. | Ideally the BHA is operated to minimize sagging within the borehole.
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| 10. | Fresh water is pumped down a borehole into the salt.
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