I'm surprised mining is so low. As an outsider, it seems like similar work to construction but with the danger turned up to 11. I can think of multiple potential explanations, but I have no intuitive sense of which, if any, is likely right.
These metrics are reported on both internally and externally and make up major components of incentive payments. I'm completely used to management having 70+% of the incentive being tied to company performance, which is in turn strongly influenced by safety performance metrics.
I'm used to targets well under sub-1.0 TRIR at class 1 operators. Something like 4 would pause the project.