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Advanced Degassing Methods for Safe Mining Operations and Clean Energy Production

Learn about modern degassing techniques in mining for safety and energy production, including methan drainage and LNG utilization.

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Advanced Degassing Methods for Safe Mining Operations and Clean Energy Production

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  1. "Underground In TheCloud" New Technologies in Mining – Productionof LNG Ing. Josef Němec

  2. The most importantactivity in lightofsafety in coalmines • Seamswith mine gas (CH4) are degased • Underground degassingis a complexofactivitiesanddeviceswhich are usedforintendedandcontrolledpumpingofmethanfrom a seamsurroundingrocksor free spaceandfollowingisolateddraining-outgaseousmixturefromdegassingsources in coal mine throughgasconduit • Maintasksofdegazation are: • Securingofrunningundergrounds • Miningoutofaccumulatingdamp in alreadyworked-outandclosedareas • Miningoutof mine gasfromascertainedresource place in thewhole face working area (or in itssurrounding) DEGASSING OF MINE EXCAVATION

  3. Map ofworking unit-degassingrealized by longboreholefromairgate working unit degassing by longboreholes

  4. RealisingofmethanoccuresduringminingofcoalseamfromcoalmeasuresRealisingofmethanoccuresduringminingofcoalseamfromcoalmeasures • Methandrainageis done for safe face advancingusingdegassingboreholesplacedacrosseither to coalroofor to seat rock ofthethedugseat • Boreholeofthelength 50-70 m are drilled on thesideof air gates in a distance 40-60 m • Degassingboreholes are connectedwithcommondegassingpipelineleading to thedegassing station Methandrainageborehole • "Underground In TheCloud"

  5. DrillingmachinefordrillinglongdegassingboreholesfromoutletairwayDrillingmachinefordrillinglongdegassingboreholesfromoutletairway Vrtání degazačních vrtů

  6. Degassingstations are in eachcoal mine – localdegassingstations • Centraldegassingstations are on the mine surface Degassing station

  7. Installationof co-generational unit (CGU)in close to square in Orlová • Thisinstallationis a part of a bigproject on constructionof CGU whichwasrealized by the Green GasCompany in the area ofOstrava-Karviná coaldistrict • Gasfromcentralgassystemisusedfor motor drive transportingdampfromworkingcoalmines • Electricenergy (power) issupplied to distribution network • Basic factsabouttheproject • • Totalinstalledpower 0,8 MW  • • Runningsince 2007 • • Annualpowergenerationaproximately: • 5 400MWh UTILIZATION OF metHan (NATURAL GAS)

  8. Modernsteam-gaspower station in Krasavin (Russia) Utilizationofmethan (naturalgas)

  9. liquefiednatural gas – LNGisnaturalgasunderbigpressurerefrigerated on verylowtemperature • Whenis natural gasrefrigerated to -161° C itisbecoming a clearliquidwithoutcolour, taste and smell • LNG containsonly1/600 fromthe volume of natural gas in faseousstate • According to International EnergyAgencytheworldwidecapacityof LNG productionwillrisefromcurrent 370 z dnešních 370 billionscubic metres in a year to 540 billions Utilizationofnaturalgasandproduction „LNG“ • "Underground In TheCloud"

  10. LNG isutilized in powersupply, drive of: agriculturalmachines, buses, trains (BurlingtonNorthern) andevenship (e.g.Glutraferry in Norway) • Fluidificationof natural gasis a sophisticatedtechnologicalprocess • Firstly: water, sulphid, CO2 and otheradulterants are removedfrom natural gas, thereafterwecanfluidify natural gas by coolingdown to -162 °C usingatmosphericpressure • Despitehighproductioncosts and complicatedstorage in specialcryogenicreserviorcooled by liquidnitrogentheuitilizationof LNG issharplyrising utilizationOf LNG • "Underground In TheCloud"

  11. attractiveisfactthat LNG containsonly 1/600 • ofprimargasamount • Thisfactallowsconsumers to diversifypurchaseworldwide and givesthempossibiltyofhigherflexibilty in case ofconsuption • LNG istransported on seawyas by shipwith double-hullwithspeciallyproducedreservoirs UtilizationofLNG • "Underground In TheCloud"

  12. LNG istransported by tank cars (trains) or by simillarlyadaptedcisterns • LNG isgasyfied by gradualheating in thedestination Schemeoftypicalconstruction of LNG reservoir Utilizationof LNG in theworld • "Underground In TheCloud"

  13. LNG isconsidered to bethe most promising motor fuel • Itsutilizationissharplydeveloping, someterminals are built in China, Japan, Europe and in the USA • Gazpromisinterested in itsdevelopementwhichbuildssometerminalsfordelivering to Europe and Japan • LNG has beendelivered by ship to France and Spain Utilizationof LNG in transportation • "Underground In TheCloud"

  14. The USA haveannouncedtheywouldbuildtwoterminalsfor LNG export to Europe • PolishcompanySolbus has alreadystartedproductionofbusesusing LNG • In the Czech Republic isneitherinterest nor a customer • Atleastonegas station wouldnecessary (close to Prague) – thenfreightcarscould use thisecologicandcheapfuel Utilizationof LNG in transportation • "Underground In TheCloud"

  15. SOLBUS SOLCITY 12 presented on International Public Transport Trade Fair „TransExpo“ inKielce (Poland) SOLBUS presenting city bus se svým Solcity12, LNG version • "Underground In TheCloud"

  16. JapanescompanyKawasakiHeavyIndustries (KHI) has completedthedevelopementofcontainershipusing LNG drive • theshipisable to transport 9000 freightcontainers • theshipis a hybrid – using LNG as well as diesel Utilizationof LNG in transportation

  17. Only CNG isused in transportation in theCzechRepublic b utitis not suitableforfreightcars • Atpresent 5,500 vehiclesuses CNG as fuel, 47 fuelstationshavebeenbuilt • Till 2020: 400,000 vehiclesshould use CNG as fuel (based on theagreementbetweenstateandgascompanies) • Itis a questionhow many vehicleswill use otázkou LNG Utilizationof LNG in thecR • "Underground In TheCloud"

  18. Utilizationofdegassedgasmixture in the OKD : • Theonlyonesubscriberofalldisponibleproductionfromthesystemofthecoal mine degassingis Green Gas DPB Companyfrom Paskov • Green Gassubscribesgasfromall OKD coalmines to theirpipelinesystemforfutureutilization by theirtradepartnersorfortheirownutilization in energysources Utilizationof LNG in thecR

  19. "Underground In TheCloud" Použitá literatura : Jiří Grygárek - Václav Kryl,Vladimír - VladimírPetroouš - Vlastimil Hudeček: Základy hornictví,VŠB-Ostrava 2010, dotisk I. vydání http://www.hornictvi.info/prirucka/technika/tezba.htm https://www.google.cz/?gws_rd=cr&ei=IrjeUrq6EcqR4ATz2IGQAw#q=green+gas http://byznys.lidovky.cz/gazprom-chce-v-roce-2018-spustit-v-baltu-terminal-na-vyrobu-lng-pry-/firmy-trhy.aspx?c=A130626_200200_firmy-trhy_kys http://tresen.vscht.cz/kap/data/ke_stazeni/8_skripta_perspektivni_zpusoby_vyuziti_zemniho_plynu_soubor.pdf http://www.hybrid.cz/kawasaki-navrhlo-lod-na-zkapalneny-zemni-plyn Obrázky : http://www.psg.eu/obr_novinky2.asp?id=27&f=scan-000-photo-2220.jpg http://www.hybrid.cz/i/auto/hybrid/Solbus-Solcity-12-CNG_3.JPG http://tresen.vscht.cz/kap/data/ke_stazeni/8_skripta_perspektivni_zpusoby_vyuziti_zemniho_plynu_soubor.pdf http://www.hybrid.cz/i/kawasaki-lng-lod.jpg http://www.hybrid.cz/i/kawasaki-lng-lod-2.jpg

  20. "Underground In TheCloud" THANK YOU FOR YOUR ATTENTION. Ing. Josef Němec

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