Wiktionary
caved in
vb. (en-past of: cave in)
Usage examples of "caved in".
According to the stories, forty or fifty Chinese were sealed up inside when the mine caved in, and if so, they'd still be there, preserved like mummies in an Egyptian pyramid.
It was as if when the adit caved in and they found they were trapped in the shaft, they all decided to write their last wills and testaments on the support beams.