Related by context. Frequent words. (Click for all words.) 42 longwall 42 Crandall Canyon 40 mine 39 mine shafts 39 Mine 38 coal mine 38 MSHA 38 coal seam 37 miners 37 ventilation shaft 37 mining 37 shaft 36 coal seams 36 stopes 36 mine shaft 35 Crandall Canyon mine 35 mines 35 Crandall Canyon Mine 34 cavern 34 trapped miners 34 underground 34 miner 34 stope 34 rescuers 34 cavers 34 coal mines 33 underground workings 33 Coal Mine 33 rockfall 33 Kennecott 33 shafts 33 coalmine 32 Minister Laurence Golborne 32 Mine Safety 32 Randal McCloy Jr. 32 cave 32 coal miners 31 coalmines 31 Donlin Creek 31 Sago mine 31 Rescuers 31 CONSOL 30 owned Codelco 30 coal 30 coal mining 30 miners trapped 30 Copiapo Chile 30 drillers 30 Stickler 29 coal miner 29 Mining 29 Sago Mine 29 Kemerovo 29 Manalich 29 Exxaro 29 Miners 29 trapped underground 29 Kevin Stricklin 28 Patriot Coal 28 Consol 28 NIOSH 28 AngloGold 28 Codelco 28 Manchin 28 HUNTINGTON Utah 27 Kerry Allred 27 colliery 27 Escondida 27 Romarco 27 coalfield 27 Coal Mining 27 mineworkers 27 CNX Gas 27 Arch Coal 27 Cabin Creek 27 cave ins 27 Sago 26 poisonous gases 26 Richard Stickler 26 Aquarius Platinum 26 near Copiapo Chile 26 Collahuasi 26 Rescue crews 26 Peter Whittall 26 Powder River Basin 26 Whittall 26 NNSA 26 Consol Energy 26 silicosis 25 mountaineers 25 Surface Mining 25 rubble 25 Minister Jaime Manalich 25 Governor Joe Manchin 25 rescue 25 Golborne 25 capsule 25 ADEQ 25 Massey Energy 25 combustible dust 25 Oppegard