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煤礦科技英語——4. COAL DEPOSITS AND RESERVES
Althoughcoaldepositsexistinnearlyeveryregionoftheworld,commerciallysignificantcoalresourcesoccuronlyinEurope,Asia,Australia,andNorthAmerica.Commerciallysignificantcoaldepositsoccurinsedimentaryrockbas...
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煤礦科技英語——5. BRIEF INTRODUCTION TO COAL MINING
Coalmining[1]istheremovalofcoalfromtheground.Theminingmethodemployedtoextractthecoaldependsonthefollowingcriteria:a.seamthickness[2],b.theoverburdenthickness,c.theeaseofremovaloftheoverburden,d.theeas...
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煤礦科技英語——6. LONGWALL MINING SYSTEMS
Longwallmininghasalonghistoryofsuccessfulapplications,eveninthinandinclinedcoalseams[2].Thistypeofminingismoremechanizedthananyothermethod,andnecessitatescarefulattentiontotheselectionoftheexpensiveeq...
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煤礦科技英語——7. LONGWALL MINING TECHNIQUES
7-1ClassificationofLongwallMiningTechniques[1]Longwallminingtechniques,Inaccordancewiththeproductioncapacities[2]andthetechnico-economicconditions,canusuallybeclassifiedintothreetypes.A.Thedrillingand...
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煤礦科技英語——8. COAL CUTTING MACHINES SHEARER
8-1MajorComponentsofShearers[1]Althoughtherearemanymodels,theshearerhasseveralcommonbasiccomponents.Adouble-endedranging-drumshearer[2],forexample,consistsoffourmajorcomponents:electricmotors[3],gearh...
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煤礦科技英語——9. POWERED SUPPORTS
9-1IntroductionModernlongwallminingemploysself-advancinghydraulicpoweredsupports[1](whichwillsimplybecalledpoweredsupportsinthisbook)atthefacearea.Thesupportsnotonlyholduptheroof,pushthefacechainconve...
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煤礦科技英語——10. ARMORED FACE CONVEYOR
1.IntroductionInlongwallcoalmining,thecoalcutdownbytheshearerortheplowistransportedbythearmoredfacechainconveyor(AFC),whichislaidacrossthefullfacewidth,totheheadentryT-junction,whereitistransferredtot...
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煤礦科技英語——11. VENTILATION
11-1TheMainFunctionsofVentilation[1]Ventilationisoneofthemostimportantaspectsoflongwallmining.Themainfunctionsofventilationinlongwallminingis:A.Supplyoffreshairattolerableheatandhumiditylevels[2]forth...
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煤礦科技英語——12. METHANE CONTRAL
1.IntroductionInlongwallcoalmining,thecoalcutdownbytheshearerortheplowistransportedbythearmoredfacechainconveyor(AFC),whichislaidacrossthefullfacewidth,totheheadentryT-junction,whereitistransferredtot...
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煤礦科技英語——13. Dust Control [1]
13-1IntroductionThefinecoalandrockparticlesproducedinundergroundminingarecalledthedust.Thesizesoftheparticlesaredenotedbytheirdiameterinmicrometers（μm）.Thedustthatissuspendedinandmovedwiththeairinvent...
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煤礦科技英語——14. MINE FIRES [1]
14-1FactorsCausingMineFiresCoalasafossilfuelcancatchfirebybothnaturalandman-madecauses.Somecausesofcoalfirescanbefoundin:A.Spontaneouscombustion[2]B.ForestfiresclosetocoalseamsC.Travelingfirefromonese...
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煤礦科技英語——15. ENVIRONMENTAL ISSUES [1]
Becausesignificantvolumesofearthmustbedisplacedtominecoal,coalminesandtheresultingrockwaste[2]canharmtheenvironment.Furthermore,burningcoalreleasesenvironmentallyharmfulchemicalcompoundsintotheair.15-...
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煤礦科技英語——16. MINING SUBSIDENCE
16-1IntroductionMiningsubsidence[1],likeanearthquake[2],isageologichazardthatcanstrikewithlittleornowarningandcanresultinverycostlydamage[3].However,unlikeanearthquake,miningsubsidencegenerallyaffects...
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煤礦科技英語——17. SUB-LEVEL CAVING [1]
17－1TheSupportsforSub-LevelCavingCharacteristicsofthesupportsforsub-levelcaving:Shieldorchockshieldsupportsaredesignedforuseintheminingofthickseamsbythesub-levelcavinglongwallmethod.Thesupportsarealso...
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(MT 927—2004)KS型礦燈
本標準第4章第4.3.8條、第4.4.2條、第4.4.5條為強製性的，其餘為推薦性的。本標準是根據礦燈製造技術、礦燈充電控製技術的不斷發展，對MT/T68—1992《自動電壓控製型酸性礦燈充電架通用技術條件》和MT129—1985《堿性礦燈充電架通用技術條件》進行修訂的。本標準將各類礦燈（酸性、堿性）充電架歸入，標準名稱相應改為《礦燈充電架》，提高了標準的適用性。在MT/T68—1992和MT12...
