Thanks!
Yeah, the anthracite mine owners were not known for treating their employees well. If you get a chance, watch "The Molly Maguires" movie that starred Sean Connery as Jack Kehoe. The tour guide touched on it a bit, but there was a lot more to it all. All of it happened right here in Eastern PA, and in fact Jack Kehoe is buried in old St Jerome's cemetery about a mile from my house.
https://www.imdb.com/title/tt0066090/