Banging the Mine Wall (IMAGE)
Caption
University of Utah graduate student Shengdong Liu uses a sledgehammer to whack the wall of an abandoned copper mine in Arizona during a test of a new system that could locate miners trapped by a mine collapse. The system utilizes sledgehammers and iron plates embedded in the mine wall, as well as listening devices on the surface, to analyze the pattern or "fingerprint" of seismic waves created when a trapped miner hammers on the iron plate or mine wall. Each location within the mine has a distinct fingerprint, allowing rescuers to find the trapped miners.
Credit
Naoshi Aoki, University of Utah.
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