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APRIL 2018 VOL. 123 NO. 3 April 2018 www.coalage.com 1 feature articles 16 Fluid Power Systems for Longwalls The hydraulic networks that deliver emulsion from the tanks in the headgate to the last shield on the face also determine the overall efficiency of operations 20 New Wireless Tech for Underground Mines Could Save Lives, Costs Innovations promise to boost signals, detect gases anywhere, and provide continuous tracking without cables or junction boxes 24 Janus Revealed The Mythology of Solar Energy 28 The Economics of Workplace Safety Putting a price on material handling mishaps 32 Ideas From the Field Training responsible persons to lead and succeed 36 Stemming for Large Diameter Boreholes Blasters should not underestimate the value of proper stemming coal in the news 4 Foresight Will Close Deer Run Mine 4 Westmoreland Coal Considers Bankruptcy Protection 5 FirstEnergy Subsidiaries File for Bankruptcy 7 Coal-related Lawsuit Against Springfield is Dismissed 9 Knight Hawk Coal Expects Record Steam Coal Production in 2018 10 Rio Tinto Sells Queensland Assets, Exits Coal Business 11 Corsa Now Pure-play Met Coal Producer, Reopens Hornung Mine 12 Paringa Making Progress on New Poplar Grove Mine 13 Majority of Voters Support Upgrading the Coal Fleet 14 CONSOL Energy Reports Record Production 15 Haulage & Loading Moves to Tucson world news 5 Severstal Capitalizes on Demand for Coking Coal and Steel 5 Coal Carrier Capsizes in Bangladesh 5 Struggling South African Mines Sign Offtake Deal 6 Coal India to Possibly Lower Production Target for FY 2020 7 CIL Plans Significant Coal Transportation Investment 9 Chinese Import Restrictions Widen departments 2 Editorial 4 News 5 World News 8 Dateline Washington 11 People 13 Awards 14 Calendar 40 Operating Ideas 42 Suppliers News 44 Product News 46 Classifieds 48 Legally Speaking This month, Coal Age offers a review of communication technologies available for underground miners. On the cover, a miner checks a wireless CO monitor. (Photo courtesy: Strata Worldwide) this issue NEWS/4 TRAINING/32 BLASTING/36 RENEWABLE ENERGY/24