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(Click for frequent words.) 85 coal mine 73 coalmines 73 colliery 72 coal mines 68 coal mining 66 mine 65 Coal Mine 65 coalmining 59 collieries 58 coal miners 58 Sunjiawan colliery 58 Coalmine 58 miner 58 mines 57 mineshaft 57 miners 57 coalminers 56 Colliery 56 coalfield 56 opencast mine 56 Beaconsfield mine 55 mining 55 Barapukuria coal mine 55 Ulyanovskaya 55 Daping Mine 55 Daxing Coal Mine 55 coal miner 54 Renison Bell 54 Bharat Coking Coal 54 coalminer 54 Sunjiawan 54 Zasyadko mine 54 Carborough Downs 53 coal 53 Xingning 53 Gold Fields Kloof 53 survivor Brant Webb 53 Raspadskaya coalmine 53 Grootegeluk 53 Coal Mining 53 longwall mine 52 Jiu Valley 52 Daping mine 52 Wesfarmers Curragh 52 lignite mines 52 Tower Colliery 52 coalfields 52 Gaomendong Coal Mine 52 Sunjiawan coal mine 51 Barapukuria Coal Mine 51 Xiangning county 51 Tunlan coal mine 51 opencast coal 51 steelworks 51 Batian mine 51 Baralaba mine 51 Aberpergwm 51 Wilpinjong 51 Mine 51 Xinxing mine 51 Sangshuping town 51 Dajinhe Coal 51 BHP Billiton Ravensthorpe nickel 51 Cobbora 51 Shenlong Coal Mine 51 Sunjiawan mine 50 Driefontein mine 50 coal seam 50 Mianchi 50 Boodarie 50 goldmining 50 Barapukuria 50 Queensland Galilee Basin 50 Chenjiashan coal mine 50 Baal Bone 50 tailings dam 50 Dongfeng Coal Mine 50 Iron Ore Mine 50 Daping coal 50 Kemerovo Region 50 Gunnedah Basin 50 Coal 50 Halemba coal mine 50 uranium mines 50 Woodie Woodie manganese 50 Osinniki 50 underground longwall 50 Zuoyun 50 Xinxing Coal Mine 50 Raspadskaya coal 50 Siberia Kemerovo region 50 Longwall 49 Buffelsfontein mine 49 Elandsrand mine 49 Sago Mine 49 Raspadskaya mine 49 coking coal miner 49 Chenjiashan Coal Mine 49 bauxite mines 49 Wangjialing 49 Elandsrand 49 BGRIMM 49 Xinjing Coal Mine 49 mine shaft 49 southwestern Guizhou province 49 opencast mines 49 Kemerovo region 49 Paparoa Range 49 Tolukuma gold 49 Newpac 49 Blyvooruitzicht mine 49 Heilongjiang Longmei Mining 49 Tunlan Coal Mine 49 Koornfontein 49 Mines ERPM 49 Wilberg Mine 49 Chenjiashan mine 49 Panguna copper mine 49 Maules Creek coal 49 opencast coal mine 49 Ensham 49 opencast 49 Caval Ridge 48 Tahmoor Colliery 48 Yandi iron ore 48 Xinmi 48 Kuzbassrazrezugol 48 Yubileynaya mine 48 anthracite mine 48 Maamba Collieries 48 Xiangfen County 48 Metallurgical Construction 48 Enlow Fork Mine 48 Moorvale 48 near Carletonville 48 brickworks 48 Ulyanovskaya mine 48 Yangquan Coal Industry 48 blast furnace 48 Oaky Creek 48 Jharia coalfield 48 Murrin Murrin nickel 48 Genwal Mine 48 Kompania Weglowa 48 Shuozhou 48 Genwal Resources 48 Tahmoor mine 48 Sawahlunto 48 iron ore mines 48 Zijin 48 Beaconsfield Mine 48 flooded Wangjialing Coal Mine 48 Anzac Day rockfall 48 Avebury nickel mine 48 Zasyadko 48 Taizhina mine 47 Hongtong county 47 opencast mining 47 Shanxi Coking Coal 47 Liuhuanggou 47 Harmony Elandsrand mine 47 Zapadnaya 47 Xiangfen county 47 Darasun 47 Barminco 47 South Eastern Coalfields 47 Wangjialing Coal Mine 47 Ramu Nickel 47 Xinwen Mining Group 47 Surface Mine 47 Nayong county 47 Mongolia Tavan Tolgoi 47 Zhao Tiechui 47 coking coal mines 47 OKD 47 Yandi mine 47 Coppabella 47 NRE Wongawilli Colliery 47 Yuzhkuzbassugol 47 Mittal Steel Temirtau 47 PT Adaro Indonesia 47 trapped miners 47 privately owned Xiaonangou 47 Kanmantoo 47 Kolubara 47 Jianhe Project 47 Yunnan Tin 47 Eneabba 47 Hatfield Colliery 47 Limited SCCL 47 eastern goldfields 47 Hancheng 47 Pilbara iron ore 47 Mahakam River 47 Wangjialing mine 47 Mining 47 Tautona mine 47 Shanxi province 47 Cockatoo Coal 47 Pamodzi Gold Orkney 47 Zhezkazgan 47 Wugang 47 Dursunbey 47 anthracite mines 47 China Shanxi Province 47 longwall mines 47 Lennard Shelf 47 Eastern Coalfields Limited 47 Moab Khotsong mine 47 Glennies Creek 46 coal seams 46 alumina refinery 46 coke ovens 46 Murrin Murrin 46 Yandi 46 Maruwai 46 unfinished Wangjialing mine 46 Jianxin Coal Mine 46 Rotowaro 46 Lianyuan 46 Yuzhou 46 Guanyao Coal 46 Dong Mao Huo 46 Huayuan Mining Co. 46 Pajingo gold 46 Kaltim Prima 46 Jixi 46 Anxin Coal Mining 46 Dotiki 46 pithead 46 Iron Ore Mines 46 Yubileinaya mine 46 Eastern Coalfields 46 Aracoma Mine 46 longwall 46 Kuznetsk 46 Maikuben 46 Karara iron ore 46 Sekisovskoye 46 Haizhou 46 Raspadskaya 46 Goondicum 46 Zambia Chambishi 46 Qitaihe 46 Mt Lyell 46 Bengalla mine 46 Escondida copper mine 46 Escondida copper 46 Barapukuria Coal Mining 46 Ramu nickel mine 46 Alumina Refinery 46 Surat Basin 46 Maruwai coal project 46 Barakova mine 46 steep sandstone cliffs 46 Honeymoon uranium 46 Zapadnaya mine 46 Singareni Collieries 46 TauTona mine 46 Luliang 46 Ballarat Goldfields 46 Aman Tuleyev 46 Ridgeway Deeps 46 Yenakiyevo 46 Ramu nickel 46 Sago mine 46 Anker Coal 45 KCGM 45 SECL 45 Rand Proprietary 45 EXX SJ 45 Koolyanobbing mine 45 Koolan Island 45 polymetallic mine 45 owner Guo Yungang 45 Windimurra Vanadium 45 copper smelting 45 Great Noligwa 45 Kloof mine 45 Maritsa Iztok 45 proverbial canaries 45 Aberpergwm mine 45 Tunlan mine 45 Bowen Basin 45 Duralie 45 Gov. Erdal Ata 45 Darasun mine 45 bituminous coal mines 45 Ravensthorpe nickel 45 Wu'an 45 Ravensthorpe nickel laterite 45 Coppabella mine 45 bauxite mine 45 OneSteel Whyalla 45 Fosterville Gold 45 opencut 45 Dajinhe 45 Wodgina mine 45 coke oven 45 Hamersley Iron 45 Changyuan 45 Weiyuan county 45 Kainantu gold 45 Cahora Bassa dam 45 Xinwen 45 steel mill 45 Yankuang 45 mineworker 45 Yubileinaya 45 Jianhe Coal 45 magnetite ore 45 Barapukuria coal 45 Pingdingshan 45 Fengcheng 45 magnetite iron ore 45 Beckley Pocahontas 45 Jinfeng mine 45 Ok Tedi copper 45 coking coal 45 Peculiar Knob 45 Whim Creek copper 45 Ulan 45 Ffos y Fran 45 hydro electric dam 45 Southern Kuzbass 45 Zapsib 45 Ulaan Ovoo 45 Panguna mine 45 Datong Coal Mine 45 Vanchem 45 Lengshuijiang 45 Shanxi Henan 45 Weipa bauxite mine 45 Kremikovtsi 45 Marula mine 45 Xinxing 45 Galena Mine 45 Porgera gold 45 Sayano Shushenskaya hydropower 45 Worsley Alumina 45 Zbigniew Madej spokesman 45 Quecreek mine 45 Chichester Hub 45 Zasyadko coal 45 Kambalda nickel 45 Bengalla 45 Port Kembla steelworks 45 ICG Beckley 45 Jiaohe 45 long jeeahng province 45 Kellingley Colliery 45 Toquepala 45 Kylylahti 45 Yuxian county 45 Non Ferrous Metal 45 pulp mill 45 Grootvlei mine 44 Polokwane smelter 44 Dugald River 44 miners trapped 44 Tolukuma mine 44 integrated steelworks 44 Pinglu 44 Aracoma Coal Co. 44 Aracoma Alma 44 Krasnolimanskaya mine 44 Cadia East 44 Gasfield 44 Queensland Surat Basin 44 Hegang 44 Stillhouse Mining 44 Willy Joynson 44 Wang Xingang 44 Southern Kuzbass Coal 44 Ib valley 44 describes familicides 44 Sasol Secunda plant 44 Monto Minerals 44 Lennard Shelf zinc 44 beneficiation plant 44 Goonyella coal 44 Aditya Birla Minerals 44 North Karanpura 44 MAL Zrt 44 Ukraine Donbass coalfield 44 Bonte Koe 44 tailings dams 44 Kuzbass 44 Coalfields 44 Limited BCCL 44 nickel smelter 44 Moolarben 44 Gold Fields Driefontein 44 Qingshan 44 Pilbara 44 Yichuan county 44 Zululand Anthracite Colliery 44 opal mining 44 Marcelo Kemeny 44 Amantaytau 44 Explosion shakes 44 Tarong 44 Otjozondu 44 Laizhou 44 bauxite 44 openpit mining 44 coke oven battery 44 Beaconsfield goldmine 44 UBB Mine 44 Assmang 44 Wandoan 44 Massey Energy 44 Gindalbie Karara 44 Porgera mine 44 Bougainville Copper 44 Sigou Coal Mine 44 abattoir 44 Coal Seam Gas 44 Sihe Coal Mine 44 Peter Whittall 44 Baluba copper mine 44 Sbaffoni 44 Wagerup refinery 44 coal slurry ponds 44 metallurgical coal mines 44 Oxiana Ltd 44 Mchuchuma 44 Somkhele 44 Delta Dunia Makmur 44 Chamalang 44 Wangjialing coal mine 44 Koolyanobbing 44 Zhangzhuang mine 44 Qinshui 44 smelter 44 Galilee Basin 44 Kroondal mine 44 Preparation Plant 44 lignite mining 44 Dongria Kondhs 44 Cloudbreak mine 44 Grzegorz Pawlaszek head 44 Whitetail Kittanning Mine 44 TauTona 44 Zijin Mining Group 44 coalseam gas 44 UBB mine 44 alumina 44 karaoke parlor 44 coking 44 Vedanta bauxite mining 44 Xstrata Copper Kidd 44 Jiexiu 44 Qijiang 44 Xinjing mine 44 Munmorah 44 Aldoga 44 Codelco Chile 43 owned Chenjiashan coal 43 Aurukun bauxite 43 Collieries 43 Coal KPC 43 Sayano Shushenskaya dam 43 Minesadco 43 Xishui 43 Heilongjiang pronounced HAY 43 Singareni Collieries Company 43 Moorvale mines 43 Erdenet 43 OAO Yuzhkuzbassugol 43 MSHA 43 Murowa mine 43 Koolyanobbing iron ore 43 Mezhdurechensk 43 Maritsa East 43 Mayskoye 43 Gold Mine 43 underground coal seams 43 East Kalimantan Indonesia 43 Tulsequah 43 Daw Mill 43 Gov. Aman Tuleyev 43 Northparkes 43 Nchanga smelter 43 Phulbari coal 43 Chambishi Copper Smelter 43 Samancor Chrome 43 Xinyao 43 Darby Mine 43 Songzai 43 Worsley alumina refinery 43 Dikulushi copper silver 43 Foisey Creek 43 Konkola Copper Mines KCM 43 ferro alloy 43 Marikana 43 longwall mining 43 Sepon copper 43 Port Pirie smelter 43 copper smelter 43 Thach Khe 43 Yubileynaya 43 Crandall Canyon Mine 43 Andrew Hutin 43 Kumba Iron Ore Sishen 43 Buffelsfontein 43 openpit 43 Pingyu Coal & 43 Hard Coking Coal 43 Wilberg mine 43 Fuxin Mining 43 Steelpoort 43 Northparkes mine 43 thermal coal 43 lignite 43 coal washeries 43 Liupanshui 43 Sigou 43 PT Bukit Makmur 43 Sayano Shushenskaya 43 Tillegra Dam 43 HWE Mining 43 Mantos Blancos 43 Matilda Minerals 43 Hegang Heilongjiang province 43 aluminum smelter 43 Tiwai Point 43 Verticalnaya 43 stone quarry 43 Pasminco 43 burgeoning coal seam 43 Middlemount coal 43 Ravensthorpe nickel mine 43 Phulbari 43 Sepon 43 Rushydro 43 Opencast 43 billionaire Gina Rinehart 43 Zambia Konkola Copper 43 United Taconite 43 Raspadskaya Coal 43 Mt Oxide 43 Mamahak Coal Project 43 Ruda Slaska 43 Porgera 43 Tritton copper 43 Morupule 43 Angas mine 43 Engineer Husnu Unal 43 Oakajee 43 Bafokeng Rasimone Platinum 43 northeast Heilongjiang province 43 Ulaan Ovoo coal 43 disused mines 43 Wuhai 43 Patriot Coal 43 Taizhina 43 Tongchuan 43 Bronzewing gold 43 Whim Creek 43 Uranium Mine 43 Chandgana Khavtgai 43 mine shafts 43 massive Zasyadko mine 43 Copper Mine 43 iron ore miner 43 coal seam methane 43 Xiangfen 43 Luanshya Copper Mines 43 Pakri Barwadih 43 Novoshirokinskoye 43 Energybuild 43 bauxite deposits 43 situ leach uranium 43 Reefton Goldfield 43 Massey Aracoma Alma 43 Shanghang 42 Newstan 42 Chandgana Tal 42 WA Pilbara 42 Mahanadi Coalfields 42 Yandicoogina 42 El Teniente mine 42 Allstate Explorations 42 Bayuquan 42 Nickel Mine 42 Smelting Plant 42 Port Talbot steelworks 42 Scotia Mine 42 Songshan Mountains 42 owned Huajin Coking 42 mountaintop removal mines 42 Kremikovtzi 42 Sanmenxia 42 Mount Oxide 42 Maikuben West 42 Blacksville 42 Carl Shoupe 42 Iron Ore Mining 42 Liuguantun 42 chromite mines 42 Crandall Canyon 42 Shenhua Group 42 Aluminium smelters 42 Mountaintop removal coal 42 underground coal gasification 42 Mayor Barry Easther 42 Xinyao Coal Mine 42 Massey Energy MEE.N 42 Yankuang Group 42 Cananea copper 42 Wagerup alumina refinery 42 Bobov Dol 42 Yunnan Copper 42 Sayano Shushenskaya hydroelectric 42 coal fired 42 Tongguan 42 magnesium smelter 42 Tampakan copper gold 42 Lanjigarh alumina refinery 42 bauxite mining 42 iron ore 42 dump retreatment 42 Huayuan mine 42 Mooiplaats 42 near Barroteran 42 Bendigo Mining 42 Kryviy Rih 42 taconite plant 42 Eastern Coalfields Ltd 42 Zhao Tiechui deputy 42 ZeroGen 42 coal washery 42 Newmont Yanacocha 42 steelmill 42 Marikana mine 42 Tolukuma Gold 42 Wang Donghai 42 Mt Windarra 42 Elandsrand Mine 42 Belle Ayr 42 Karaganda region 42 Palamin 42 Mine Explosion 42 Chambishi Metals Plc 42 Kellingley 42 Tasmania Beaconsfield 42 Middlemount mine 42 Wilcherry Hill iron ore 42 Newcrest Cadia 42 Lomas Bayas copper 42 Erdenes MGL 42 LaRonde mine 42 Tallawarra 42 Jinfeng 42 Abbot Point 42 northern Shanxi province 42 underconstruction 42 Caijiaying zinc gold 42 Chenjiashan 42 Shenhua Ningxia Coal 42 taconite mine 42 methane CMM 42 trapped underground 42 Gujarat NRE 42 Erdenes Tavan Tolgoi 42 vertical shaft 42 Driefontein 42 Sukari gold 42 Singrauli 42 Blyvooruitzicht 42 Mount Klappan 42 Yakutugol 42 Pilbara region 42 Donbass coalfield 42 Xingfa 42 Xuangang 42 ferronickel smelter 42 hydroelectric 42 Nonoc 42 Tallmansville 42 Coalburg 42 Minmetals 42 Cadia 42 Oyu Tolgoi Project 42 ATP#P 42 Appalachian Fuels 42 Kriviy Rih 42 Coking Coal Project 42 Nickel Cobalt 42 Lake Cowal 42 Mine Safety 42 quarry 42 mayor Barry Easther 42 Wambo 42 Sufco 42 Taoshi 42 Ok Tedi mine 42 Jizhong Energy 42 goldminer 42 Kingking 42 PT Aneka Tambang Antam 42 aluminum smelting plant 42 Wonthaggi desalination plant 42 Zijin Mining 42 Sago 42 Marvel Loch 42 ATH Resources 42 Adaro Indonesia 42 Datong Coal 42 Tianchi 42 Kintyre uranium exploration 42 Vedanta bauxite 42 Loveridge Mine 42 PT Kideco Jaya Agung 42 Casa Negra mine 42 Indonesia Antam 42 Varanus Island gas 42 Damtshaa 42 Mponeng 42 Merriespruit 42 Southdown magnetite 42 open hearth furnace 42 Yabulu nickel 42 Cudeco 42 Consolidation Coal 42 uranium mining 42 CoalQuest 42 bituminous mines 42 Paparoa Ranges 42 Mount Isa Mines 42 Tangshan 42 Zondereinde mine 42 Mandiri Utama 42 Barberton Mines 42 Blacksville No. 42 Heathgate Resources 42 Shunda Mining 42 Escondida mine 42 ferroalloy 42 vast Wangjialing mine 42 Zhaoyuan 42 Handan Steel 42 Southern Kuzbass OAO 42 Handlova mine 42 PT Kaltim Prima 42 goldfields 42 Zarechnoye 42 Bulyanhulu mine 42 China Minmetals 42 means titanic boa 42 Syama gold 42 Krzysztof Mejer spokesman 42 DRDGold 42 Portovelo 42 Huajin Coking Coal 42 Henry Walker Eltin 42 Thermal Coal 42 Cononish 42 Qingtongxia 42 Ovoo 42 Zhuzhou Smelter 42 Safety SAWS 42 Bambanani mine 42 Yarwun 42 frigid Heilongjiang province 41 Bandanna Energy 41 Kagara Ltd 41 Sukinda 41 Pluto liquefied natural 41 Xstrata Mount Isa 41 Exco Resources Ltd 41 Vedanta Alumina 41 Palabora 41 Alcan smelter 41 Mamahak 41 Benga coal 41 Yuxian 41 Tavan Tolgoi 41 Steelworks 41 Zincor 41 BHP Escondida 41 Pamodzi mines 41 Sinosteel Corp 41 Ok Tedi Mining 41 Sayano Shushenskaya plant 41 Cloncurry Copper Project 41 CHARLESTON W.Va. Coal 41 Severoceske Doly 41 Kalgold 41 BCMCL 41 steelmaker Evraz 41 Samancor 41 Polymetals 41 Centennial Coal 41 blast furnaces 41 Clairton Coke Works 41 Aurukun bauxite deposit 41 longwalls 41 slurry ponds 41 Soumber 41 Twin Shaft 41 Malmberget 41 Mr Whittall 41 Chambishi Metals 41 Qunli mine 41 Shougang Group 41 Sago explosion 41 Halemba mine 41 Coal Mine Explosion 41 Collahuasi mine 41 pitheads 41 Baan Baa 41 Maules Creek 41 Bootu Creek manganese 41 gypsum mines 41 miner Exxaro 41 Luanshya Copper Mine 41 Utah Crandall Canyon 41 Koolan Island iron ore 41 Mulyashi 41 Yabulu nickel refinery 41 Tasmanian timber 41 Novoshakhtinsk 41 Udokan copper deposit 41 Aberfan disaster 41 Martabe 41 Argyle Diamonds 41 Hemerdon 41 miners entombed 41 Pilbara iron 41 ASX RIO 41 Holdings SACMH 41 Aracoma Alma Mine 41 Shanxi Hebei Hunan 41 Shougang Steel 41 Orapa Letlhakane 41 Fuxin 41 laterite nickel 41 rockfall 41 steelmaking 41 Josh Ufer 41 Xiaonangou coal mine 41 Shanxi Coking 41 iron smelting 41 Nolo Mine 41 southwest Guizhou province 41 Shaanxi Shanxi 41 Chiria iron ore 41 Arkaroola 41 chromite ore 41 Irokinda 41 underground 41 Batu Hijau copper 41 Onca Puma nickel 41 Huayuan 41 Gibraltar copper molybdenum 41 zinc smelting 41 Lomas Bayas 41 AGD Mining 41 Baluba mine 41 ore 41 GRD Macraes 41 Gandhamardan 41 eastern Jiangxi Province 41 Brood X emerged 41 Kalgoorlie smelter 41 Esteban Primera 41 opencast pit 41 Whyalla steelworks 41 PT Bayan 41 PT Arutmin 41 cave 41 Thermal Power Plant 41 Huaibei 41 Governor Aman Tuleyev 41 Toquepala mine 41 ferronickel 41 Miitel mine 41 Bauxite Resources 41 CONSOL 41 Zheng Guang 41 Guodian 41 Kinsenda 41 Cerro Verde copper 41 Niyamgiri hills 41 Exxaro Resources Ltd. 41 Boodarie Iron 41 Tongliang 41 Yanzhou 41 Patratu 41 Dotiki Mine 41 Phu Bia 41 Hotazel 41 Pattiki 41 Linfen 41 Mount Thorley Warkworth 41 steelmaker Mechel 41 Middlemount 41 Jiugang 41 tin smelters 41 Coalbed 41 Profile Research RIO.L Quote 41 Turamdih 41 Hillgrove Resources 41 Kaltim Prima Coal 41 Aracoma mines 41 Minara Resources Ltd 41 Mt Isa Mines 41 Sakoa 41 drained peat bogs 41 manganese smelter 41 PT Arutmin Indonesia 41 Hunnu Coal 41 dragline 41 gasfields 41 methane ignitions 41 tailings dumps 41 Xingzhen 41 roof bolter 41 Diavik mine 41 Frontino gold 41 Saurashtra Fuels 41 Sumochaganaobao region 41 Consolidated Rutile 41 Croesus Mining 41 Eucla Basin 41 China Huaneng 41 PT Adaro Energy 41 Luo Lin 41 coke oven batteries 41 Sanyuandong Coal Mine 41 Ovoot Tolgoi coal 41 PT Indika Energy 41 Jiwei Mountain 41 Rio Tinto Hamersley 41 goldminers 41 Ordos basin 41 Xiangning 41 Foxleigh 41 Windimurra 41 Burraga 41 brick kiln 41 Molyhil 41 Queensland coal seam 41 ironworks 41 Grasberg 41 Crandall Canyon mine 41 Shaft Sinkers 41 goldfield 41 Styldrift 41 Shougang 41 Laiwu 41 Anyang Steel 41 Heshun 41 Hongtong 41 Ruyang 41 copper miner Codelco 41 Jama Jarrett spokeswoman 41 Cuajone mines 41 Mopani Copper Mines 41 Sun Huashan 41 Wiluna uranium 41 Zincor refinery 41 Patache port 41 Beijing Fangshan district 41 Mount Isa Cloncurry 41 Kuranakh 41 Opencast mining 41 limestone quarry 41 primary escapeway 41 Burnakura Gold Mine 41 Xstrata Coal 40 Bellary Hospet 40 Freda Rebecca 40 Neryungri 40 coal seam gas 40 Baal Gammon 40 Chelopech mine 40 Liuguantun mine 40 Mines KCM 40 Perilya 40 Zhengzhou Coal Industry 40 Modikwa 40 Tony Kokshoorn 40 Chinalco 40 Wingellina 40 OZ MINERALS 40 Montana Tunnels 40 Moatize coal 40 China Gezhouba 40 Karadon mine near 40 DRD Gold 40 Zhang Xizhi 40 Northam Platinum 40 Tomago 40 Ravensthorpe mine 40 Gove alumina refinery 40 gasholder