>> reporter: mine safety sources say they grow frustrated with the deep pockets industry and big-money lawyers who challenge violations. >> isn't it true they can keep tying you in knots? >> they may be able to do that, but the real cost is when you shut them down. when you shut that mines machine down and they can't run coal. that's the real cost. >> the feds find it hard to touch even repeat offenders if they correct the violation. it's like an endless series of strikes with few ever called ute. >> the law gives them the opportunity to correct their violations and go back to work. >> reporter: until there is a big accident, and then everyone