外文翻译--现有开采方法在矿井深部开采中应用的评估

《外文翻译--现有开采方法在矿井深部开采中应用的评估》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、英文原文PROSPECTSESTIMATIONOFKNOWNSYSTEMSAPPLICATIONFORCOALSEAMSMININGATGREATDERTHProf.w.p.ZubovLeningradMiningInstituteAbstract：Estimationofpresentandfuturesituationintechnologicalschemesoncoalminingatgreatdepthapplyinghighlyproductivemechanizedcomplexesispresentedhere,Stisshownthatt

2、hedecreasebothinoperationconcentrationandtheshareofpillarminingatdeepminesisconnectedwithincreasingdifficultiesindevelopmentworkingsupportbehindthefaceaswellaspreventionofroofcavinginfacearea.Introduction：UndergroundcoalminingefficiencydependsatIargeextentontechnicaleconomicindice

3、sofdeepmines,theleveloftheirdevelopmentbeingsteadilyincreased.Intransitiontodeeperlevelsspecificexpendituresincreaseparallelwiththedeteriorationofgeologicalconditionsincoalseamsmining.AtminesofDonetskbasinwhereseamsareminedatadepthof500madmore,thedepthincreaseforevery100mresultsin

4、productioncostto3-4%,herelabourproductivityofminersdecreasesin6-8%[1].Oneofthemaineffectivewaystoneutralizenegativedepthinfluenceonunder-roundcoalminingefficiencyistoincreaseaveragedailyfaceoutputonthebasisofusingcomplexmechanizationinstopping.Atnon-gassyminestheapplicationoflongp

5、illarminingleadstofaceoutputin1.2-1.65timescomparedtoaveragedailyfaceoutputinlongwallcombinedmethods.Evenmoreeffectiveappearedtobelongpillarmininginstoppingunderconditioncharacterizedbyincreasedgasemissioningoaf.Ingassyminesthefaceoutputisdeterminedtakingintoaccounttherequiremento

6、fmethanedilutionuptopermissibleconcentration,withmethaneemittingintoventilationcurrent.Inlongwallandcombinedmethodstheintakeairshouldenterthefacealongoneofthedevelopmentworkingsandthereturnairrunsalongtheotherdevelopmentworking.Maximumintakeairquantitytothestopedependsonbothaircur

7、rentveloclty,regulatedbysafesecurityrulesinworkingareaandcrosssectionareaofthefacewhichisfreeforaircurrentpassage.Thefactorsmentionedabovebeingofnon-regulatednature,ifbecomespracticallyimpossibletoincreasethequantityofintakeairtohepanel.Accordingtothereasonsdiscussedatmineswithinc

8、reasedmethaneemissiontheactualave