I guarantee you that there are not SCSR caches every 200 feet. Anywhere in the US. The criteria for spacing of caches is seem height. The distance that a miner could crawl, duck walk, or walk in 60 minutes.Why on earth would a escaping miner need to swap out a self rescuer every 200 feet? In 2006, I was part of the industry advisory group that had input into writing the MINER ACT that set the new standards.
And under Federal law, all underground mines are deemed gassy, ( whether they ave methane or not ).
In 2011 after the UBB disaster the UBB seam Mine owners met with MSHA and State Mine Inspectors and they all agreed that the Long walls would each carry 4 caches of Rescuers and each Pillaring section would have them every 200 feet until they were 2 miles outby. This agreement is in place on EVERY Long wall and Pillaring section until we are done Pillaring and the Long wall is removed and brought out. Now in July or August when we are done and we go to the other side of the seam and start back in we will have new Roof Control plans Cache Location Distances and even Longwall criteria. It will remain that way in the UBB seam because as they said there will not be another 29 dead men. The sad thing is it was all preventable but Millionairs and MSHA got greedy and we are the ones that have to accept all of these stipulations. We all know that when the Mine explodes 1) Nobody will ever make it to a shelter. 2) a thousand Rescuers will not do anything and 3) The Air in a real Gassy mine will be the only thing that keeps you alive. We are not Bisthmus Coal. Ours is not for Steel. Ours goes straight to China and ALL that we can ship. BTW, UBB shut down with MSHA approval 2 of the fans for repairs and still allowed the mine to continue running. OOOOPPPPPSSS!!!