Related by context. Frequent words. (Click for all words.) 44 rockfall 40 Crandall Canyon 39 stope 37 Raspadskaya mine 37 Northam Platinum 37 coal mine 37 vertical shaft 37 Mine Safety 36 Sago Mine explosion 36 miner 36 miners 36 longwall mining 36 Eva Vergara 36 longwall 35 coal slurry 35 MSHA 35 Crandall Canyon mine 35 Randal McCloy 35 mining 35 Crandall Canyon Mine 34 mine shaft 34 shaft 34 trapped miners 34 mine 34 NYSE CNX 34 ventilation shaft 34 Orangeville Utah 34 valley fills 33 Randal McCloy Jr. 33 NYSE ACI 33 spokeswoman Amy Louviere 33 miners trapped 33 Quecreek 33 HUNTINGTON Utah 33 stopes 32 Montcoal 32 ventilation shafts 32 coalmine 32 Patriot Coal 32 coal miners 32 underground workings 32 trapped Chilean miners 32 deepwater wells 32 mine shafts 31 CONSOL 31 McCloy Jr. 31 coal seam 31 Wangjialing mine 31 coal mining 31 Hecla Mining Co. 31 Pingdingshan 31 Sago mine 31 Surface Mine 31 Horizon rig 31 cave ins 30 Pasta de Conchos 30 Hyden Ky. 30 rescuers 30 Li Yizhong 30 Mine 30 Aracoma 30 Carletonville 30 Coal Mine Safety 30 Beaconsfield Gold 30 PBS Coals 30 Sago Mine 30 Richard Stickler 29 Consol Energy 29 coal mines 29 Seshoka 29 coal seams 29 Sago mine disaster 29 Sago Mine disaster 29 Mars rover Spirit 29 Sougarret 29 colliery 29 Chilean miners 29 McCloy 29 Raspadskaya 29 Hazardous Materials Safety 29 Jeff Gillenwater 29 CEO Don Blankenship 29 mineshaft 29 Sago miners 29 TDOT 29 J. Davitt McAteer 28 Transportation Safety 28 mineworkers 28 mines 28 Upshur County 28 Governor Joe Manchin 28 Minister Laurence Golborne 28 Alpha Natural Resources 28 mountaintop mining 28 Gov. Steve Beshear 28 Federal Railroad 28 Kerry Allred 28 sunken ferry 28 CNX Gas 28 underground 28 trapped underground