Related by context. All words. (Click for frequent words.) 57 Xinyao 56 owner Guo Yungang 55 Yangquan Coal Industry 55 Daping coal 54 Shanxi Jiaomei Group 52 Xingning 52 Tongchuan 52 Wu'an 51 Xiangfen County 51 Sunjiawan 50 Zhuzhou Smelter 50 northeast Heilongjiang province 50 Wangjialing 50 Daxing Coal Mine 50 boss Wang Guozheng 50 Hongtong county 50 Yuxian county 49 Yuzhou 49 Minesadco 49 Jixi 49 Huajin Coking Coal 49 Xiangfen 49 Chenjiashan coal mine 49 Wang Xingang 49 Codelco Chile 48 Sunjiawan colliery 48 Heilongjiang Longmei Mining 48 Daqing oilfield 48 Raspadskaya coal 48 karaoke parlor 48 Shanxi Coking Coal 48 Hegang 47 Mianchi county 47 Dong Mao Huo 47 Xiangning county 47 Non Ferrous Metal 47 Jinfeng 47 Zijin 47 PT Bukit Makmur 47 Shanghang 47 owned Huajin Coking 47 Xingzhen 47 Xiangning 47 Guanyao Coal 47 Tunlan Coal Mine 47 Belle Ayr 47 Batian mine 46 northeastern Liaoning province 46 Gaomendong Coal Mine 46 Heilongjiang Longmei Holding 46 Xiangfen county 46 northern Shaanxi province 46 eastern Jiangxi Province 46 Xinxing 46 Mianchi 46 Zijin Mining SHA # 46 Whim Creek copper 46 Jianxin Coal Mine 46 Yichuan county 46 Maikuben West 46 Sumochaganaobao region 46 flooded Wangjialing Coal Mine 46 Xuangang 46 Sawahlunto 46 Sangshuping town 46 Kaltim Prima 46 Sunjiawan coal mine 46 Yubileinaya 46 northwestern Shaanxi province 46 Xinwen 45 PetroChina Daqing 45 Lengshuijiang 45 Kagara Zinc Ltd. 45 Xinmi 45 Yunnan Tin 45 Namisa iron ore 45 Zhengzhou Coal Industry 45 Mandiri Utama 45 Datong Coal Mine 45 Jiexiu 45 Hegang Heilongjiang province 45 Alumbrera copper 45 Gold Fields Driefontein 45 Wangjialing Coal Mine 45 Newmont Yanacocha 45 Novoshakhtinsk 45 Xinyao Coal Mine 45 Zhaoyuan 45 Tasmania Beaconsfield 45 Dongfeng Coal Mine 45 Datong Coal 45 Xinxing Coal Mine 45 Anxin Coal Mining 45 Changyuan 45 Sunjiawan mine 45 Daping Mine 45 Fengcheng 45 Mittal Steel Temirtau 44 Dursunbey 44 Tongguan 44 Hancheng 44 northern Shanxi province 44 Jiaohe 44 unfinished Wangjialing mine 44 Xintai 44 Zuoyun 44 Los Pelambres copper 44 Jianhe Coal 44 Dajinhe Coal 44 Daping mine 44 Hunan Nonferrous Metals 44 George Baywong 44 Nariin Sukhait 44 southwestern Guizhou province 44 flooded Wangjialing coal 44 Woodie Woodie manganese 44 Hongtong 44 Maruwai coal project 44 China Shanxi Province 44 Grzegorz Pawlaszek head 44 La Preciosa mine 44 Pinglu 44 Weiyuan county 44 Liupanshui 44 Lianyuan 44 Nonoc 44 Ovoot Tolgoi mine 44 PT Adaro Indonesia 44 Huaibei 43 Jianhe Project 43 Shuozhou 43 Zijin Mining Group 43 Cerro Verde copper 43 Kemerovo Region 43 Xingfa 43 Shunda Mining 43 Kompania Weglowa 43 China Henan Province 43 Bayuquan 43 Huayuan Mining Co. 43 Darasun 43 Erdenes Tavan Tolgoi 43 PT Indo Tambangraya 43 RAG AG 43 Ukraine Donbass coalfield 43 Siberia Kemerovo region 43 PT Aneka Tambang Antam 43 Shenlong Coal Mine 43 Kuznetsk 43 Zeng Jinchun 43 Sun Huashan 43 Ruben Escudero 43 Zhang Xizhi 43 Baluba copper mine 43 Buffelsfontein mine 43 OAO Yuzhkuzbassugol 43 Gold Fields Kloof 43 Xinjing Coal Mine 43 Changyun coal project 43 Xinxing mine 43 Jinfeng mine 42 Ok Tedi copper 42 near Barroteran 42 Yankuang 42 Xishui 42 Neryungri 42 Hegang branch 42 Wuhai 42 Xinxing coal 42 Yuzhkuzbassugol 42 Loma Gorda 42 Shanxi province 42 Maikuben 42 Jilin Petrochemical 42 coalmine 42 Mongolia Tavan Tolgoi 42 Huayuan 42 coal mine 42 Shenhua Ningxia Coal 42 Great Noligwa 42 Harmony Elandsrand mine 42 Dajinhe 42 Shanxi Hebei Hunan 42 Yanacocha mine 42 Hunan province 42 Pingdingshan 42 Cerro Lindo 42 Cerrejon coal 42 Ulaan Ovoo coal 42 secrets Magliato 42 MAL Zrt 42 Qitaihe 42 Shanxi Coking 42 Maamba Collieries 42 Osinniki 42 China Nonferrous Metal 42 LaRonde mine 42 Jiangxi Copper Co 41 Caijiaying zinc gold 41 Songzai 41 Colombia Cerrejon 41 Southern Kuzbass Coal 41 BGRIMM 41 Ovoot Tolgoi coal 41 NRE Wongawilli Colliery 41 Porgera gold 41 ferronickel smelter 41 Luliang 41 Zhanjiang Port 41 Zhao Tiechui deputy 41 Chenjiashan Coal Mine 41 Delta Dunia Makmur 41 Zhijian mine 41 Toquepala 41 Kuzbassrazrezugol 41 Zhao Tiechui 41 Zambia Chambishi 41 Wang Dexue deputy 41 Shanxi 41 Sigou Coal Mine 41 Taizhina 41 Coal Mine 41 Indonesia Antam 41 Vanchem 41 Sigou 41 Gibraltar copper molybdenum 41 Coalmine 41 MAX molybdenum 41 Nayong county 41 Tang Yinfeng migrant 41 Zapadnaya 41 Yunnan Copper 41 Pajingo gold 41 Zijin Mining 40 Explosion shakes 40 Tolukuma gold 40 Raspadskaya coalmine 40 Wugang 40 Batu Hijau copper 40 Laiwu 40 Shaanxi province 40 Soumber deposit 40 Zasyadko 40 Chile Escondida copper 40 colliery 40 opencast pit 40 Blyvooruitzicht mine 40 coal blackened overalls 40 Sinosteel Corp 40 Barapukuria Coal Mine 40 giant Collahuasi copper 40 Zhangzhuang mine 40 Chandgana Khavtgai 40 Porgera mine 40 BHP Escondida 40 Portovelo 40 Kingking 40 Bambanani mine 40 Beijing Fangshan district 40 Chenjiashan mine 40 Homestake Mining Co. 40 Zasyadko coal 40 Tshepong mine 39 Qijiang 39 Ulyanovskaya 39 Marcelo Kemeny 39 PT Arutmin Indonesia 39 Lennard Shelf zinc 39 mine 39 Antapaccay 39 Kroondal mine 39 Maruwai 39 Guizhou province 39 Ma Xiumei 39 Exxaro Resources Ltd. 39 Zbigniew Madej spokesman 39 Wangjialing coal mine 39 Lomas Bayas copper 39 Chuxiong prefecture 39 Zapadnaya mine 39 Los Bronces Los Pelambres 39 Shanxi Province 39 Gov. Aman Tuleyev 39 Zijinshan mine 39 Massey Energy MEE.N 39 Wulong county 39 Kemerovo region 39 Handlova 39 Yandi 39 Moab Khotsong mine 39 Karaganda region 39 Xiaonangou coal mine 39 miner 39 Sekisovskoye 39 Banpu PCL 39 Signal Peak Energy 39 near Carletonville 39 Wangjialing mine 39 Handan Steel 39 Barapukuria Coal Mining 39 HOLMES MILL Ky. 39 Sayano Shushenskaya hydropower 39 Sepon copper 39 Heshun 39 Eland shaft 38 privately owned Xiaonangou 38 PT Bayan 38 Huozhou County 38 Altonorte copper smelter 38 Southern Kuzbass 38 Engineer Husnu Unal 38 means titanic boa 38 Tintaya copper mine 38 Zhezkazgan 38 Pasto Bueno tungsten 38 Yankuang Group 38 Cucumber W.Va. 38 Boodarie 38 Colombia Cerrejon coal 38 Ekati mine 38 Xinwen Mining Group 38 manganese smelter 38 Iron Ore Mines 38 Fosterville Gold 38 Cerrejon 38 Lomas Bayas 38 Patache port 38 Wodgina mine 38 Bafokeng Rasimone Platinum 38 Huayuan mine 38 Bharat Coking Coal 38 Bulyanhulu mine 38 La Preciosa killer 38 Kaltim Prima Coal 38 Mayskoye 38 Poisonous gases 38 Koornfontein 38 Qinshui 38 mountainous Benguet province 38 Casa Negra mine 38 Xstrata Mount Isa 37 Gujiao 37 Ordos basin 37 Mantos Blancos 37 Mezhdurechensk 37 Pinglu County 37 miners 37 Tautona mine 37 ferronickel 37 EXX SJ 37 subsidiary Barrick Goldstrike 37 Henan province Shan 37 Coalburg 37 Los Pelambres mine 37 Escondida copper 37 Semirara Mining Corp. 37 Safety SAWS 37 Antamina copper zinc 37 Laiwu Steel 37 Suzy Bohnert spokeswoman 37 Wilberg Mine 37 Codelco Norte division 37 Raspadskaya 37 sand sculpted ravines 37 largest borate mine 37 Pingyu Coal & 37 God bless Sago 37 Renison Bell 37 Ruda Slaska 37 Newpac 37 Elandsrand mine 37 southwestern Yunnan 37 Ramu nickel mine 37 Tangshan 37 Barapukuria coal mine 37 Yandi mine 37 zinc smelting 37 Ballarat Goldfields 37 Steel Minntac 37 Beaconsfield Mine 37 Elandsrand Mine 37 Erdos Basin 37 Tunlan coal mine 37 Appalachian Fuels 37 Ashdown molybdenum 37 Grasberg copper 37 Nolo Mine 37 Qunli mine 37 Yuxian 37 frigid Heilongjiang province 37 Halemba coal mine 37 Shandong Jiangsu Henan Hebei 36 Ramu Nickel 36 Ruyang 36 El Teniente mine 36 Kevin Stricklin MSHA 36 Amapari mine 36 Jizhong Energy 36 Murrin Murrin nickel 36 Chenjiashan 36 Yubileynaya 36 Barapukuria 36 Beckley Pocahontas 36 coalmines 36 PT Arutmin 36 PolyMet copper 36 Yenakiyevo 36 Tropical Storm Prapiroon 36 Shanxi Henan 36 United Taconite 36 Indonesia Adaro 36 Jama Jarrett spokeswoman 36 Jiwei Mountain 36 Ulaan Ovoo 36 Kainantu gold 36 PT Adaro Energy 36 Meikle mine 36 Xinjing mine 36 Enlow Fork Mine 36 Taizhina mine 36 Ravensthorpe nickel laterite 36 long jeeahng province 36 governor Aman Tuleyev 36 Barakova mine 36 Kisladag 36 Damtshaa 36 Coal Mine Explosion Kills 36 copper smelting 36 Murowa mine 36 China Minmetals 36 Shenhua Group 36 Heilongjiang pronounced HAY 36 Limited SCCL 36 Verticalnaya 36 Minara Resources Ltd 36 Wilpinjong 36 Driefontein mine 36 Joe Cerenzia 36 polymetallic mine 35 Genwal Mine 35 Stillhouse Mining 35 Metallurgical Construction 35 Darasun mine 35 Aberpergwm 35 CHARLESTON W.Va. Coal 35 Tunlan mine 35 Galena Mine 35 Huadian Power 35 Kloof mine 35 Murrin Murrin 35 Magnum Coal 35 Bonte Koe 35 Kuzbass 35 coking coal miner 35 Soumber 35 Collahuasi mine 35 Kalgold 35 Prokurica 35 Chile Escondida 35 Tahmoor Colliery 35 Yandi iron ore 35 Elandsrand 35 Spokeswoman Amy Louviere 35 www.masseyenergyco.com 35 spokeswoman Jama Jarrett 35 Dotiki 35 coal mines 35 Kumtor gold 35 Kambalda nickel 35 Moab Khotsong 35 Wesfarmers Curragh 35 mines 35 Appolo Fuels 35 Antamina mine 35 survivor Brant Webb 35 Silesia region 35 goldmining 35 Lota Bay 35 Igor Volkov 35 Sihe Coal Mine 35 Pend Oreille Mine 35 Liuguantun 35 giant Cananea copper 35 Minntac Mine 35 Anker Coal 35 Sayano Shushenskaya hydroelectric 35 Neves Corvo copper 35 Kinsenda 35 Chuandongbei gas 35 Nebo Ky. 35 Mooiplaats 35 Iron Ore Mine 34 neighboring Luhansk 34 Bengalla 34 copper miner Codelco 34 Lumwana Copper Mine 34 Aracoma Coal Co. 34 Ensham 34 Genwal Resources 34 KCGM 34 proverbial canaries 34 Toromocho copper project 34 Sernageomin 34 tin smelters 34 Ramu nickel 34 spokesman Dirk Fillpot 34 TauTona mine 34 Supt Knowles 34 nickel smelter 34 Coal Mine Blast 34 Lamar Guymon 34 Qinshui Basin 34 mineworker 34 Boroo Mine 34 Daniel Rockhouse 34 Jiu Valley 34 Tulsequah Chief 34 owned Chenjiashan coal 34 Gamsberg project 34 ore 34 Wilburg mine 34 Halemba mine 34 Marikana mine 34 Shaanxi Shanxi 34 Pinaya Project 34 copper molybdenum mine 34 Rosebud Mining 34 Escondida copper mine 34 mining 34 Tampakan copper gold 34 Aracoma Alma 34 SAY goh 34 Meng Xuenong 34 Cananea copper 34 BHP Billiton Escondida 34 situ leach uranium 34 Coal KPC 34 ore pellets 34 Yubileinaya mine 34 Koolan Island 34 Aman Tuleyev 34 taconite plant 34 coalminer 34 CoalQuest Development LLC 34 Coal Mine Explosion 34 CoalQuest 34 Mufulira copper 34 Sago W.Va. 34 Bodee Allred 34 southwest Guizhou province 34 Sago miner 34 Novoshirokinskoye 34 Queensland Galilee Basin 34 collieries 33 Keewatin Taconite 33 Mountaintop removal coal 33 Yandicoogina 33 Zambeze coal 33 La Caridad copper 33 stone quarry 33 Cockatoo Coal 33 Esterhazy Saskatchewan 33 Consolidation Coal 33 PT Kaltim Prima 33 LEE BLOOMQUIST covers 33 Zasyadko mine 33 Rand Proprietary 33 Somkhele 33 Toquepala mine 33 Coal Mining 33 WR Grace vermiculite 33 La Jagua 33 Sago explosion 33 OKD 33 producer PT Bumi 33 Honeymoon uranium 33 Colliery 33 Yanzhou Coal 33 Horsehead Corp. 33 Beaconsfield mine 33 Springdale Pit 33 coal slurry ponds 33 low vol metallurgical 33 ferroalloy 33 Luo Lin 33 methane CMM 33 Las Bambas copper 33 Benga coal 33 iron ore 33 Guizhou Provinces 33 Baralaba mine 33 Frasure Creek 33 Catenary Coal 33 coal mining 33 Chuquicamata mine 33 Raspadskaya mine 33 coal miner 33 Sernageomin Chile mine 33 Board LLFH 33 Yubileynaya mine 33 Liuhuanggou 33 Escondida mine 32 Kaixian 32 underground coal seams 32 Saskatchewan potash 32 Tony Kokshoorn 32 Amerikohl Mining 32 quarry 32 Aberpergwm mine 32 Toxic gases 32 Sasol Secunda plant 32 Oaky Creek 32 Blacksville No. 32 Anzac Day rockfall 32 Grootegeluk 32 Sayano Shushenskaya plant 32 Dongfeng Coal mine 32 Amy Louviere 32 North Antelope Rochelle 32 South Eastern Coalfields 32 Global miner BHP 32 miner Exxaro 32 bauxite mines 32 Sanyuandong Coal Mine 32 mine shaft 32 Elkview coal 32 Mponeng mine 32 Cananea copper mine 32 eastern goldfields 32 steelmaker Mechel 32 Gogebic Taconite 32 Esteban Primera 32 Zambia Konkola 31 Chilean miners rescued 31 Yanzhou 31 Moorvale 31 Mark Popernack 31 Ellery Elvis Hatfield 31 opencast coal 31 Hotazel 31 Willy Joynson 31 Miners Trapped 31 Moorvale mines 31 Mponeng 31 Pueblo Viejo mine 31 Elkview mine 31 Mining 31 Mines ERPM 31 Lennard Shelf 31 integrated steelworks 31 Li Yizhong 31 Miitel mine 31 Montana Tunnels 31 Tony Kokshoorn mayor 31 Mr. Wusaty 31 Goldstrike mine 31 Blaine Mayhugh 31 Doug Conaway 31 steep sandstone cliffs 31 Kellingley Colliery 31 vast Wangjialing mine 31 Utah Crandall Canyon 31 bearing stratigraphy 31 Mine 31 Rosebud Mine 31 Antamina copper 31 rich Kuzbass 31 Modikwa platinum mine 31 Dave Chirdon 31 nyse BTU 31 Genwal 31 Marula mine 31 Governor Aman Tuleyev 31 Whitetail Kittanning Mine 31 Co MEE.N 31 Kolubara 31 ferrochrome producer 30 Karara iron ore 30 Peculiar Knob 30 Cerro Verde mine 30 Quinsam underground thermal 30 Krzysztof Mejer spokesman 30 Southmountain Coal Co. 30 Hatfield Colliery 30 Diwalwal 30 opencut 30 Limited BCCL 30 Foisey Creek 30 Caval Ridge 30 Beaconsfield goldmine 30 Coal Mine Safety 30 TauTona 30 magnetite iron ore 30 metal nonmetal 30 coking 30 copper smelter 30 Duralie 30 Coppabella mine 30 Cobbora 30 tailings dam 30 Tahmoor mine 30 Massey Energy 30 Massey Aracoma Alma 30 opencast coal mine 30 Blacksville 30 Chichester Hub 30 tailings dams 30 brickworks 30 Collahuasi copper mine 30 El Mutun iron ore 30 Kennecott Minerals Co. 30 massive Zasyadko mine 30 Pasta de Conchos 30 Onca Puma nickel 30 EVTAC Mining Co. 30 Mount Thorley Warkworth 30 smelter 30 mountainous Sichuan province 30 anthracite mine 30 Rawl Sales 30 opencast mine 29 Blast furnaces 29 trapped underground 29 owned Strongman Mine 29 Baal Bone 29 slurry ponds 29 Peter Whittall 29 Ridgeway Deeps 29 Aracoma Coal 29 coal 29 miners entombed 29 roof bolter 29 Kintyre uranium project 29 coalminers 29 nickel miner 29 Co. MEE 29 Amfire 29 Tallmansville W.Va. 29 Handlova mine 29 HWE Mining 29 Donbass coalfield 29 Quecreek miners 29 potash mines 29 anthracite mines 29 Copper Mine 29 Koolyanobbing 29 Grasberg 29 Avebury nickel mine 29 Crandall Canyon miners 29 Dale Reightler 29 Kisladag mine 29 Maules Creek coal 29 Enlow Fork 29 borehole drilled 29 Cononish 29 Collahuasi Chile 29 Randal McCloy 29 opal mining 29 zinc smelter 29 Paparoa Range 29 Carl Shoupe 28 Carborough Downs 28 Marfork Coal Co. 28 Diavik mine 28 highly combustible methane 28 Ulyanovskaya mine 28 China Huaneng 28 Gunnedah Basin 28 trapped miners 28 coal miners 28 Crandall Canyon Mine 28 Polokwane smelter 28 methane ignitions 28 BHP Billiton Ravensthorpe nickel 28 Gov. Erdal Ata 28 alumina 28 Sufco 28 ICG Beckley 28 primary escapeway 28 iron ore mines 28 lignite mines 28 Krasnolimanskaya mine 28 Autistic hiker 28 Mine Blast 28 Atarau 28 Mine Explosion 28 dragline 28 mineworkers union 28 Iron Range taconite 28 de Sabinas 28 Gold Mine 28 Galatia Mine 28 Sayano Shushenskaya dam 28 mineshaft 28 thermal coal 28 coking coal mines 27 Chilean miners trapped 27 Horizon oilsands 27 bituminous coal mines 27 near Monongah W.Va. 27 methane gas 27 Slab Fork 27 coking coal 27 Colowyo 27 UBB Mine 27 pithead 27 coalmining 27 corroded pipe 27 uranium mines 27 miners trapped 27 Scotia Mine 27 Yandicoogina mine 27 Consol Energy 27 OZ Minerals Ltd. OZL.AU 27 bituminous coal 27 Bengalla mine 27 Patriot Coal 27 Wilberg mine 27 Kayenta Mine 27 Eastern Coalfields Limited 27 Branch UBB 27 bauxite mine 27 SCSR 27 Paracatu 26 bauxite 26 taconite mine 26 MSHA inspector 26 vertical shaft 26 trench collapses 26 Crandall Canyon mine 26 Mr Whittall 26 Absaloka Mine 26 ICG Hazard 26 Pastor Wease Day 26 colliery accidents 26 Weipa bauxite mine 26 cave 26 Gove alumina refinery 26 Minntac 26 Coal 26 Keetac 26 Tower Colliery 26 Dotiki mine 26 sub bituminous coal 26 steel mills 25 Arch Coal 25 underground longwall 25 Loveridge Mine 25 Trapped miners 25 Zondereinde mine 25 Sbaffoni 25 Tallmansville 25 Worsley Alumina 25 Coal Miners 25 Hibbing Taconite 25 HUNTINGTON UTAH 25 Ffos y Fran 25 Montcoal W.Va. 25 Severoceske Doly 25 metal nonmetal mines 25 Darby Mine 25 longwall mines 25 Twentymile 25 coal seams 25 iron ore exporter 25 Middlemount mine 25 Elk Coal Mine 25 Pilbara iron ore 25 mine shafts 25 pit cyanide leach 25 Dugout Canyon 25 Bridger Coal 24 Nchanga smelter 24 flooded Quecreek Mine 24 Coal Gasification 24 Quecreek mine 24 coalfield 24 coalbed methane 24 W.Va. mine 24 steelworks 24 coalbed 24 Surface Mine 24 metallurgical coal 24 gob piles 24 Monongah mine 24 paste backfill plant 24 iron ore miner 24 Daw Mill 24 CEO Don Blankenship 24 Dotiki Mine 24 Aracoma Alma Mine 23 Alumina Refinery 23 Oppegard 23 Coal Miner 23 limestone quarry 23 Aracoma Alma No. 23 Sago Mine 23 coalbed methane CBM 23 synfuels plant 23 PBS Coals 23 bituminous mines 23 GAG machine 23 Mine Safety 23 hydro electric dam 23 longwalls 23 longwall mine 23 CONSOL 23 Sago mine explosion 23 spokeswoman Leslie Fitzwater 23 steel mill 23 Xstrata Coal 23 burgeoning coal seam 23 Montcoal 23 Peabody Energy 23 Hobet 23 Agapito Associates 23 opencast mines 23 metallurgical coal mines 22 Aracoma mines 22 Koolyanobbing iron ore 22 Sago miners 22 Hernshaw 22 longwall mining machine 22 Bowen Basin 22 HUNTINGTON Utah 22 cavern 22 COAL 22 Aracoma mine 22 Galilee Basin 22 near Tallmansville 22 Uranium Mine 22 hydroelectric 22 Barapukuria coal 22 drilling rig 22 alumina refinery 22 Quecreek 22 Aracoma Mine 22 highwall 21 UBB mine 21 Bandmill 21 Lauriski 21 Surat Basin 21 Quecreek Mine 21 OMSL 21 Preparation Plant 21 Aracoma 21 Koolyanobbing mine 21 MONTCOAL W.Va. 21 Longwall 21 Ravensthorpe nickel mine 21 coal slurry 21 Cadia East 21 coke ovens 21 unwarrantable failure 21 Crandall Canyon 20 Worsley alumina refinery 20 slurry pond 20 Longwall mining 20 Monongah 20 uranium mining 20 UMWA 20 coal seam 20 Sago Mine explosion 20 opencast 20 Mine Workers 19 steelmaking 19 Aberfan disaster 19 mountaintop removal MTR 19 coke oven 19 aluminum smelter 19 ventilation shafts 19 Tug Fork River 19 Wagerup refinery 19 Taum Sauk 19 Kitimat aluminum smelter 19 MSHA 18 describes familicides 18 longwall mining 18 Clairton Coke Works 18 underground coal gasification 18 Sago mine disaster 17 lignite 17 coal gasification 17 blast furnace 17 Southland lignite 17 refinery 17 coal fired 17 longwall 17 Sago Mine disaster 17 draglines 17 coalfields 16 Wagerup alumina refinery 16 Sago 16 mountaintop removal mines 16 coal gasification plant 16 Sago mine 15 Governor Joe Manchin 14 Sago mine tragedy 12 Cabin Creek