An Underground Mystery Had Engineers Stumped Until They Followed the Rain

Engineers discovered that falling rainwater can unexpectedly reverse airflow deep underground, solving a mystery with important implications for mine safety. Operating a facility deep underground means constantly managing two essential challenges: air and water. Fresh air must circulate through tunnels and shafts to keep people safe, while groundwater from rainfall and underground aquifers has to [...]

from SciTechDaily https://ift.tt/SfoOyDF