The hole would be 0.5m wide and >1000m deep, backfilled with bentonite clay and concrete. At the bottom, the path curves back upward, so waste is not stored at the bottom.
Even if geology doesn’t collapse the hole, it’s hard to imagine material climbing up through 1000m of clogged pipe.
Sealing a deep narrow borehole isn’t a difficult problem. The Earth has contained oil and gas underground for millions of years.
Its contained it using geological features but once exposed how is it possible to recreate that. Its also not like this material is goo
The hole would be 0.5m wide and >1000m deep, backfilled with bentonite clay and concrete. At the bottom, the path curves back upward, so waste is not stored at the bottom.
Even if geology doesn’t collapse the hole, it’s hard to imagine material climbing up through 1000m of clogged pipe.