The United Mine Workers of America (www.UMWA.org) represents workers in the coal industry and the expectations for miners' working hours are usually negotiated and set out in various collective bargaining agreements with mine owners.
Whether or not your employer can force you to work these kinds of hours--or rather, what's considered fair working hours--is probably addressed in their agreement.
Your union is there to protect you and you should bring any grievances (or even questions like this) to your union representative. If you don't know who that is, contact the UMWA--their website has a link to the various district offices, and they can put you in touch with the right person.
Nina L. Kaufman, Esq. is an award-winning New York City attorney, edutainer and author. Under her Ask The Business Lawyer brand, she reaches thousands of entrepreneurs and small business owners with her legal services, professional speaking, information products, and LexAppeal weekly ezine. She also writes the Making It Legal blog.