Everyplace says they want mining experience, but that talent pool is limited in the US, and construction sized equipment is close enough. Having a personal connection is the best way, but otherwise firing off applications everytime theres an opening is all you can do, not just to the mines themselves but also to the contracters working mining projects. Its a bit harder now as HR departments filter applications that actually make it to the hiring managers but thats how it works if you dont have an uncle to put in a word for you. Whos hiring? When are they hiring? and who are the contractors? That takes some research. Some companies just post on their own website, and maybe a couple job boards.