Even the Charleston West Virginia Papers report that unpleasant fact:
http://wvgazette.com/News/montcoal/201110200142While the Mine was non-union (As was the previous worse disaster as Hyden Kentucky in 1970) ) you will NOT find that out from Wikipedia:
http://en.wikipedia.org/wiki/Upper_Big_Branch_Mine_disasterThe 1970 Hyden Mine Disaster:
http://en.wikipedia.org/wiki/Hurricane_Creek_mine_disasterNow the 1968 Farmington Coal Mine Disaster was in a UMW mine, but the reaction of the UMW leadership to that disater lead to Yablonski attempt to win the Presidentency of the Union (and his Murder in 1969)
More on the Yalblonski Murder:
http://en.wikipedia.org/wiki/Joseph_YablonskiJohn L. Lewis had over seen the switch of the UMW from a marginal player in the Coal Industry to be the dominance force behind coal miners from the Mine Strike of 1927 till his retirement in 1960. Lewis was a life long Republican and preferred Republicans when he had a choice (He backed FDR in 1932 and 1936, but reverted to the GOP in 1940). On the other hand he had no aversion to using Communists and other lefties to get recruits for the UMW (and which made him hated by the Right Wing in the US, even through he was a good Republican). These Lefties show him that the only way to improve the lives of miners was to increase productivity, which Lewis actually supported, even against mine owners who were still making money using older technology (Yes, the UMW was created with being the force behind increase coal productivity per miner from the 1920s till the 1980s and in many ways today).
On the other hand his GOP friends are the people he put in charge and took charge of the UMW after he retired in 1960 (And mistake he lived long enough to see and once yelled at his successor Tony Boyle, that he had cause a mess in the Union and sooner or later he would pay the price for it). Boyle did not take Lewis Advice to clean up the UMW in the Late 1960s, instead Boyle fought any attempt to reform the Union, including ordering the killing of Yabloski. For that Killing, the County of Washington PA (The County south of Allegheny County, the county whose county seat is Pittsburgh, and at that time all the suburbs of Pittsburgh were still in Allegheny County, since that time some of the outer suburbs have moved into Northern Washington County).
I bring up the suburbs of Pittsburgh only to show Washington County was much poorer then much of the rest of the State, and had to bare the sole cost of taking on the Killers of Yabloski, including holding the Trial in a County near Philadelphia when a change of venue was sought and granted.
Anyway, the Washington County Prosecutor worked his way up the chain of Killers till he had the evidence against Tony Boyle. Tony was Convicted and the UMW was able to return to what it had been under Lewis, a pro-mine worker group whose first claim was always mine safety, second was increase income for the miners do to any increase in productivity of the mine.
Like many a group the UMW lost its way for a time, but returned to its roots by the early 1970s and has remain the main force behind mine safety ever since. The UMW ordered many a walk out for safety reasons in the 1970s and 1980s, but then the Mine Owners started to use all the techniques developed since the 1930s to keep their mines union free (i.e. hire people who have to drive to the mine, make sure nothing is close for the miners to get together and talk outside the mine, constantly stores of how the UMW was forcing mine owners to close mines and telling miners if they join a union they would close the mine, and close any mine that was unionized.
Today less then 1/3 of coal mined in the US is done by UMW members (Most of the Coal out west is NON-UMW mines). This has spread to the East using the same techniques, make sure the miners live far apart from each other and the only time they can get together is on Mine Property and use the No Trespassing laws (most such Trespassing Laws were originality passed in the last 1800s as an anti-union technique) to keep union organizers away from the Miners (The desire to hire people with Cars, follows the same policy, people get in their car and drive home, hard for any union organizer to talk to them and by making sure all the miners live in different parts of the rural area the mine is in, hard for the organizer to go from miner to miner).
Yes, the UMW is the best force behind mine safety but that is why mine owners do all they can to keep their mines non-union.