This morning brings news of another mine incident. This time in New Zealand. As I write this text, the fate of 27 miners is still uncertain. One can only hope the outcome is the same if not shorter duration than the Chilean mine collapse earlier this year.
Just yesterday, I was contemplating the idea of writing on this topic when saw a Newsweek article and I was reminded of the sad outcome of the Sago mine disaster in West Virginia. This event and other similar ones spawned governent legislation entitled "MINE IMPROVEMENT AND NEW EMERGENCY RESPONSE ACT OF 2006 (MINER ACT)" Part of this act was aimed at improving communication between miners and surface support personnel both normally and in the wake of an incident. This act provided funding for important research in a number of key areas. The targeted time for the approval and deployment is now at hand and it looks to be interesting on how these new and developing technologies will impact the market for Functional Safety products.
The idea of providing mine communication systems presents many challenges. If wireline or wireless technology is going to be deployed it has to be intrinsically safe in that it will not, under normal or fault conditions, by way of an electrical spark or overheated component initiate a fire or explosion. This means that the circuitry has to use very low voltages and have protection against faults. As recent events have underscored, mines can become flooded, tunnels and areas can collapse, and there is the continual risk of explosion from dust and/or gasses. Lastly, the mine is always being expanded, so communication systems have to be scalable. Typical wireless technology that would be used in a normal factory like industrial setting is not workable underground where tons of rock can stand between transmitters and receivers. Even so, it appears that some companies are close to solving these problems with systems that have redundancy and the ability to reroute signals using the best path. To me, it sounds like what happens on the Internet where traffic is continuously re-routed in response to outages and/or congestion. It will be interesting to see the impact of these new products if/as they gain a foothold in the market for functional safety products.
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