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  2. Kola Superdeep Borehole - Wikipedia

    en.wikipedia.org/wiki/Kola_Superdeep_Borehole

    The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on Earth (since 1979), which attained maximum true vertical depth of 12,262 metres (40,230 ft; 7.619 mi) in 1989. [1]

  3. Xiaozhai Tiankeng - Wikipedia

    en.wikipedia.org/wiki/Xiaozhai_Tiankeng

    The Xiaozhai Tiankeng is 626 meters (2,054 feet) long, 537 meters (1,762 feet) wide, and between 511 and 662 meters (1,677 and 2,172 ft) deep, with vertical walls. Its volume is 119,349,000 m³ and the area of its opening is 274,000 m 2. This material has been dissolved and carried away by the river.

  4. Boring (earth) - Wikipedia

    en.wikipedia.org/wiki/Boring_(earth)

    Boring is drilling a hole, tunnel, or well in the Earth. It is used for various applications in geology, agriculture, hydrology, civil engineering, and mineral exploration. Today, most Earth drilling serves one of the following purposes: return samples of the soil and/or rock through which the drill passes; access rocks from which material can ...

  5. How Drilling the World’s Deepest Holes Could Give Us ...

    www.aol.com/drilling-world-deepest-holes-could...

    Getting close to Earth’s sun-hot core is key to scaling geothermal energy plants. But it’s harder than it looks to dig miles into the ground. How Drilling the World’s Deepest Holes Could ...

  6. Well to Hell - Wikipedia

    en.wikipedia.org/wiki/Well_to_hell

    The temperature deep within was 1,000 °C (1,800 °F), heat from a chamber of fire from which screaming could be heard. The Soviet Union had, in fact, drilled a hole more than 12 km (7.5 miles) deep, the Kola Superdeep Borehole, located not in Siberia but on the Kola Peninsula, which shares borders with Norway and Finland.

  7. Category:Deepest boreholes - Wikipedia

    en.wikipedia.org/wiki/Category:Deepest_boreholes

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  8. Travel to the Earth's center - Wikipedia

    en.wikipedia.org/wiki/Travel_to_the_Earth's_center

    The only part of the Earth that turns out to be hollow is a gigantic geode, and soon after the drill moves through it, the hole it created fills with magma. The 1986 animated television show Inhumanoids featured regular visits to the Inner Core in most of its 13 episodes. Each of the three villainous creatures theoretically ruled over certain ...

  9. List of deepest mines - Wikipedia

    en.wikipedia.org/wiki/List_of_deepest_mines

    This list of deepest mines includes operational and non-operational mines that are at least 2,224 m (7,297 ft), which is the depth of Krubera Cave, the deepest known natural cave in the world.