it very much depends on where you are in the world. the uk doesnt have much of a mining industry left, generally most people interested in a career in mining will have studied Geology, mine engineering or some other relevant earth science.
worth looking at Cardiff university or get looking at some of the bigger companies abroad BHP/RIO/VALE.
the uk mine industry will also now hurt after the tragic loss of the 4 miners in South Wales so this will make it more difficult for employment here.
Canada still has a lot of work but to really get a lot out of the mining industry you have to be skilled and have proper training/qaulifications.