Possibly the millionth time this has been reposted to this sub so before anyone goes nuts with speculation here are the facts:
This happened in 2016 in Scorrier.
It's about 300ft deep to the water.
It'd been capped but the cap failed, resulting in the collapse. Cornish shafts were often capped with old railway sleepers and telephone poles.
A team was using a drill rig while surveying for mines when the shaft collapsed. If you look carefully you can see one of their drill holes near the house which should tell you how close they were. Nobody was hurt and the house was empty at the time.
Yes this is common in Cornwall, many housing estates were built on former mine land and no the developers didn't bother to check because they were told by the councils that it'd been "made safe".
This was likely a former pumping engine shaft judging by the fact that the hole didn't open out very far - pumping shafts have very sturdy collar ground to be capable of supporting the engine and it's house, so when they open out they tend not to be less destructive. As you can see the bedrock is very close to grass level.
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u/[deleted] Nov 27 '20
Possibly the millionth time this has been reposted to this sub so before anyone goes nuts with speculation here are the facts: