Related by context. Frequent words. (Click for all words.) 55 MSHA inspectors 54 Darby Mine 53 MSHA 53 Utah Crandall Canyon 51 Yuzhkuzbassugol 50 mine 50 Aracoma 50 properly ventilating 49 Pasta de Conchos 49 Zasyadko mine 49 cave ins 48 coal mine 48 Crandall Canyon mine 47 miner 47 miners 47 near Carletonville 47 Oppegard 47 highly combustible methane 47 coal mines 47 Jeff Gillenwater 46 Elandsrand 46 Taum Sauk reservoir 46 Elandsrand mine 46 Crandall Canyon Mine 46 OSHA cites 45 Aracoma Alma No. 45 Crandall Canyon 45 Mine Safety 45 Hobet 45 Sago mine 45 coal mining 45 Co. MEE 45 Qitaihe 45 longwall mining 44 coalmine 44 Sago Mine 44 Massey Energy 44 mines 44 Sago mine disaster 44 Tallmansville 44 Sago 44 Xinxing 43 mining 43 coal miners 43 Sago miners 43 Ulyanovskaya mine 43 Raspadskaya 43 spokeswoman Amy Louviere 43 Raspadskaya mine 42 coal miner 42 coalmines 42 Cabin Creek 42 Quecreek 42 Wangjialing mine 42 Taum Sauk 42 Tony Oppegard 42 de Sabinas 42 longwall 42 Sago Baptist Church 42 Quecreek Mine 41 mine shaft 41 trapped miners 41 Kemerovo region 41 Beaconsfield Gold 41 Mine 41 Massey 41 Kerry Allred 41 Mezhdurechensk 41 MIOSHA 41 Beaconsfield mine 41 Yuzhou 40 mineworker 40 Melanie Hennessey 40 mine subsidence 40 Monongah 40 rockfall 40 Scotia Mine 40 Chief Executive Don Blankenship 40 Escondida mine 40 Sago Mine explosion 40 Bharat Coking Coal 40 spokesman Kendall Marlowe 40 Dean Fryer 39 Chesapeake Appalachia 39 Gil Cerda 39 Grasberg mine 39 mine shafts 39 vents methane 39 tailings dam 39 Anglo Platinum Ltd. 39 Montcoal 39 Orangeville Utah 39 owned Codelco 39 Kleen Energy Systems 39 ventilation shafts 39 Mine Workers 39 Sentula 39 Konkola Copper Mines 39 Louviere 39 ventilation 39 Assmang