There are uncharted mine shafts, some where homes used to be because people woul... | Hacker News

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		EamonnMR on Dec 14, 2018 \| parent \| context \| favorite \| on: Firefighting foam heats up coal fire debate (2010) There are uncharted mine shafts, some where homes used to be because people would mine under their basements. There are also sinkholes which you can see in pictures of the highway.

EGreg on Dec 14, 2018 [–]

Can’t you map those by seeing where air is still flowing in? Release some dust and map its flow. Or better yet just cover the surface with foam.

throwaway2048 on Dec 14, 2018 | [–]

Its not just mineshafts where it burns, it burns directly underground where it has never been mined before due to permeable rock.

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