Related by context. Frequent words. (Click for all words.) 44 underground workings 43 mine workings 40 adit 38 mineralized zone 38 trench 37 mine shaft 37 mine shafts 36 roadbed 35 outcropping 35 coal seams 34 ore grades 34 Mine 34 coal seam 34 orebody 33 borehole 33 HUNTINGTON Utah 33 leach pad 32 creek bed 32 caldera 31 shaft 31 boulder 31 cavern 31 miners 31 weir 30 entombed 30 miners trapped 30 ore 30 tailings pond 30 riverbed 30 wellbore 29 slopes 29 Hecla 29 crater 29 Gold Mine 29 mine 28 Crandall Canyon Mine 28 manhole 28 Crandall Canyon mine 28 Coal Mine 28 mined 27 canyon 27 coalmine 27 Cigar Lake 27 coal mine 27 trapped miners 27 miner 27 creek 27 drainage pipe 27 ledge 27 Martian surface 26 Rio Blanco 26 mines 26 ravine 26 pit 26 Sago Mine 26 mining 26 coal mining 26 quarry 26 cave 25 excavator 25 colliery 25 mountainside 25 coal miners 24 rockslide 24 steep embankment 24 Chilean miners 24 rescuers 24 W.Va. mine 24 caves 24 sinkhole 24 capsule 24 winched 24 rockfall 24 shafts 24 longwall 23 Harmony Gold 23 trapped underground 23 Crandall Canyon 23 Perilya 23 underground 22 coalfield 21 stairwell 21 coal mines 21 tunnels 21 trapped 21 crevasse 20 elevator shaft 20 coal miner 20 tunnel 20 Mine Safety 19 crevice 19 underground tunnels 19 MSHA 18 cavers 18 Rescuers 18 gorge 18 mountain 16 cliff 16 Whittall 15 climbers 13 chute