Related by context. Frequent words. (Click for all words.) 56 Northshore Mining 56 MSHA 55 Montana Tunnels 55 Galena Mine 54 mine 54 Mingo Logan 54 Coal Mine 54 Aracoma 54 MSHA inspectors 54 highwall 54 longwall 54 Hobet 53 Minntac 53 WVDEP 53 Dewatering 53 Massey Aracoma Alma 53 Elandsrand 52 Wodgina 52 Mine 52 Yuzhkuzbassugol 52 coal mine 51 longwall mining machine 51 Sago Mine 51 Jerritt Canyon Mine 51 Goldstrike 51 Scotia Mine 51 Assmang 51 Varanus Island 51 Coal 51 coal mines 51 Darby Mine 51 Sago 51 Anacortes refinery 51 Los Pelambres 51 Murrin Murrin 51 Cabin Creek 51 Patriot Coal 50 Meikle mine 50 CONSOL 50 Sago mine 50 mines 50 Zasyadko mine 50 Taum Sauk 50 Mine Safety 50 Hibbing Taconite 50 MSHA inspector 50 Hycroft Mine 50 Crandall Canyon 50 Surface Mine 50 Nickel Mine 50 Deno Gold 49 Taconite 49 Uranium Mine 49 zinc smelting 49 Buzwagi 49 Marikana 49 Cerrejon 49 La Guitarra Mine 49 Dunkard Creek 49 Coalmine 49 Kansanshi 49 mining 49 longwall mining 49 coalmines 49 El Cubo mine 49 Ovoot Tolgoi 49 Mining 49 Coal Mining 49 Tintaya 49 Ulyanovskaya mine 49 Jerritt Canyon 49 Nugget Pond 49 Lauriski 48 EVTAC 48 Kroondal 48 PGM ounces 48 Moundsville W.Va. 48 Metallurgical coal 48 coal mining 48 Hawesville 48 Antamina 48 coal seam 48 Roca Honda 48 Hatfield Ferry 48 Ming Mine 48 Cozamin Mine 48 La Coipa 48 Cadia 48 Tallmansville 48 Elkview 47 Kisladag 47 stockpiled ore 47 Myra Falls 47 Monongah 47 Porgera 47 Aquarius Platinum 47 Aracoma Alma No. 47 Westmoreland Coal 47 Grasberg 47 Rosebel 47 Crow Butte