Mining covers a lot of different work situations, some much more dangerous than others. Historically coal miners - underground, shitty geology, low margin, large workforce - drew the short straw. Death rates were routinely in the 300-400 per 100,000 per annum range in the first half of the 20th century.
Now it is about a tenth of that in the developed world but conditions in places like China and Russia have not progressed nearly so much. Also, that is deaths with your boots on. We don’t routinely count miners who died prematurely with soot-filled lungs.