Regrettably the only "safe" place is the location where any mine actually exploded, couple of feet away, not so much. The haphazard nature of the exploration i

Regrettably the only "safe" place is the location where any mine actually exploded, couple of feet away, not so much. The haphazard nature of the exploration is the big issue and using this would most likely give people a false sense of security. This is an interesting piece of lo-tech design created with the very best of intentions, but it is essentially useless and may even be harmful.