I would say there hitting 500 t per day not alltogether so far. If you read the report about the conveyor clogging and needing upgrading. 500 T in 2 weeks would not clog a conveyor.
You obviously no nothing about coal mining. My dad has sold and serviced mining equipment for over 30 years with every company in that area. He has been a top salesman in the area all of my life. I said that to say, fixing the roof in the mine was not a two hour job like you would see in a factory. It has to be worked, check approved and have the work approved by state and federal inspectors. They were lucky to have that much coal on the ground in two weeks time.