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A comment on Stacking concrete blocks is a surprisingly efficient way to store energy. Parent comment

Re:Stacking concrete blocks is a surprisingly efficient way ... by crispyambulance on Saturday August 18, 2018 @08:45PM (#17791799)
The compressed air would be located in deep inside abandoned mines. The volume and thus energy storage potential of such places is vast.

The idea has been around for decades, but no one has been able to really do it yet.

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Re:Stacking concrete blocks is a surprisingly efficient way ... by cgdcraig on Sunday August 19, 2018 @01:11AM (#17792720)
Rock isn't necessarily airtight more so in mines. A fractured host material for the ore is very desirable as it means less explosives and higher ore production numbers.
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