3 ms·
The entrance is at about 1560m altitude, so the mine goes way below sea level. It's nowhere near as deep as the Kola Superdeep Borehole though [1], which has b
by mkl 4y ago
The entrance is at about 1560m altitude, so the mine goes way below sea level. It's nowhere near as deep as the Kola Superdeep Borehole though [1], which has been on HN a number of times [2], and is only a narrow bore that people can't go down. The temperature at the bottom of that one got to 180°C, preventing further drilling.
[1] https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole
[2] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&query=kola%20borehole&sort=byPopularity&type=story https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
- cinntaile 4y agohttps://opentextbc.ca/geology/chapter/9-2-the-temperature-of-earths-interior/ https://opentextbc.ca/geology/chapter/9-2-the-temperature-of... This contains some graphs (the 2nd graph is most relevant) that show how the temperature changes as a function of depth. It increases much faster than I thought.
- zeristor 4y agoAssuming that air can equalise and the bottom of the mine is 2.5km below sea level, from air pressure calculations air pressure would be about ⅓ more, 1⅓ atm. I had an idea to see if plants would grow faster in a denser atmosphere. I’ve found one small study, I think the air pressure was thought to be denser when dinosaurs were about.
- aaron695 4y ago
- loufe 4y agoThis story was posted on HN a couple months ago, there is a push right now for use of a somewhat novel technique to drill extremely deep holes, producing geothermal power anywhere on the planet, with several commercial ventures in their early phases: https://newatlas.com/energy/quaise-deep-geothermal-drilling-questions/ https://newatlas.com/energy/quaise-deep-geothermal-drilling-...