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1、煤矿安全知识与技能竞赛试题（Coalminesafetyknowledgeandskillscompetitiontest）10,ventilationprofessionalcoalminesafetyknowledgephasetestpapersFillintheblanks(0.5pointspersubject,20pointseach)1.Theconcentrationofoxygenshallnotbelessthan(20%),andtheconcentrationofcarbondioxi
2、deshallnotexceed(0.5%).2,themaintoxicgasinminesare:CO2,(CO),H2S,(SO2),NO2,HN3,(CH4)andsoon.3,windpressure,thatis,thepressureofmineairflow,isthebasicparameterofmineventilationdynamics.Accordingtoitscharacteristics,itcanbedividedinto(fullpressure),dynamicpres
3、sure,and(staticpressure).4,beforethetunnelthrough,theComprehensiveMechanizedDrivingTunnelinthedistance(50meters)before,otherroadwayin20metersapart,muststopaworksurfacework,makegoodadjustmentventilationsystempreparationwork.Through,stopdiggingworkingfacemust
4、bekeptnormal(ventilation),set(fence)andalarms.After5ortwooppositedrivingfaceshavebeencompleted,alltheworkintheminingareamustbe(stopped),andtheventilationsystemshallbeadjustedimmediately,sothattheworkcanberesumedaftertheairflowhasbeenstabilized.6,thehighgasm
5、ine,coal(rock)andgas(carbondioxide)prominentmineofeachminingareaandminingeasycoalseamarea,mustsetupatleast(1)dedicatedreturnairtunnel.7,themineinthesameseam,thesamewing,thesameminingareaadjacenttotheminingfaceisbeingminedalongtheemptylane,theminingfaceisstr
6、ictlyprohibited(simultaneousoperation).Aftertheendof8,mining(45)days,mustbesetinallconnectedwiththeminingareasthroughtunnel(firewall),allclosedarea.9,theuseofgas,gasconcentrationshallnotbelessthan(30%),andintheuseofgassystemsmustbeequippedwithtempering,anti
7、gasandantiexplosioneffectsofsecuritydevices.Ifthegasisnotusedandthedrygasdrainageequipmentisadopted,thegasconcentrationofthedrainagegasshallnotbelessthan(25%).10,coaldustexplosionmusthave:oneisthedustmusthave(explosive),twoairbornecoaldustistoreachacertainc
8、oncentration,thelowerlimitforg/m3(30-50),thehighlimitis1000-2000g/m3;threeisignitedcoaldustdetonatedfire,temperature(700-800DEGCto1100DEGC);O2=18%.11,thepreventionofnaturalfiremeasuresareminingtechnolo
