Related by context. Frequent words. (Click for all words.) 45 coalmine 44 coal mine 43 Trapped miners 41 coal mining 41 coal mines 41 heavily polluted 40 Poisonous 40 coal miners 40 Neijiang 40 coalmining 39 Coalmine 39 Utah Crandall Canyon 39 coalmines 39 silica dust 39 northern Shanxi province 39 Wuhai 38 mineshafts 38 miners 38 noxious gases 38 poisonous gases 38 methane 37 Coal Mine 37 Mr Whittall 37 caves 37 northeastern Liaoning province 37 endocrine disruption 37 Ruda Slaska 37 coalminers 36 coalfield 36 sulfuric 36 colliery 36 Wangjialing Coal Mine 36 tremolite 36 toxicants 36 polluting waterways 36 mountaintop removal mines 36 tailing ponds 36 cave 36 inert gases 36 mine 36 Molly Maguires 36 Cerrejon 35 underground 35 pneumoconiosis 35 Barapukuria 35 Toxic chemicals 35 mine shafts 35 iron smelting 35 Tallmansville 35 trapped 35 trapped underground 35 Contaminant 35 Shanxi Coking Coal 35 northwestern Shaanxi province 34 subterranean 34 steam vents 34 Bill Caylor 34 goldminers 34 Luke Popovich 34 Kemerovo region 34 mineshaft 34 cave ins 34 Arabasz 34 MSHA inspector 34 Shanxi Provincial 34 Zapadnaya mine 34 phosphine 34 Mr Kokshoorn 33 coalminer 33 earth tremors 33 deplete oxygen 33 carbon disulfide 33 Rescuers retrieved 33 Shaanxi province 33 Guizhou provinces 33 Mountaintop Removal 33 inhaling toxic 33 Co. MEE 33 coal miner 33 Zasyadko mine 33 toxic gases 33 coalfield communities 33 brickworks 32 coke ovens 32 Coal Miner 32 goldmining 32 endocrine disrupting chemicals 32 Appalachian coalfields 32 Corrosive 32 Oppegard 32 Cabin Creek 32 Mingo Logan 32 Colliery 32 sole survivor Randal 32 Atarau 32 Hydrogen sulfide 32 CONSOL 32 marine sediments 32 bioaccumulation 32 Monongah 32 Ulan