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《并列双U型通风方式采空区瓦斯贮藏与运移规律研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第25卷第1O期中国矿业V01.25,NO.102016年1O月CHINAMININGMAGAZINE0ct20I6采逡技米并列双U型通风方式采空区瓦斯贮藏与运移规律研究李伟,刘彦青,张浪。,桑聪,王恩(1.煤炭科学技术研究院有限公司安全分院,北京100013;2.煤炭科学研究总院煤炭资源高效开采与洁净利用国家重点实验室,北京100013)摘要:为了揭示并列双u型通风工作面采空区瓦斯涌出规律并提出有效的瓦斯治理措施,以阳煤集团新景煤矿92116工作面为研究对象,综合考虑了工作面推进速度、进风巷风量、采空区遗煤厚度、回采区域煤可解吸瓦斯量、回采工作面煤壁瓦斯初始涌出速率等实测参
2、数,建立了基于移动坐标系下的采空区瓦斯涌出数学物理模型,数值模拟结果与实测结果之间误差小于15。结果表明:采空区首个横川巷道瓦斯浓度、回风巷瓦斯浓度、上隅角瓦斯浓度随工作面推进速度增大以朗格缪尔函数形式增长,随进风巷风量增大以指数函数形式减小。针对存在的采空区首个横川I瓦斯超限难题,定量分析了采空区第二个横川埋管抽采瓦斯措施的治理效果。关键词:工作面推进速度;进风巷风量;横川巷道;瓦斯浓度;埋管抽采措施中图分类号:TD712文献标识码:A文章编号:1004—4051(2016)10—0i01一O6Studyonlawofgasstorageandtransportingobw
3、ithparalleldoubleU—shapeventilationLIWei,LIUranqing,ZHANGLang,SANGCong,WANGEn(1.InstituteofCoalSafetyandTechnology,ChinaCoalResearchInstitute,Beijing100013,China;2.StateKeyLaboratoryofCoalEfficientMiningandCleanUtilization,ChinaCoalResearchInstitute,Beijing10013,China)Abstract:InordertOreve
4、allawsofgasstorageandtransportingobwithparalleldoubleU—shapeventilationandputforwardeffectivegascontrolmeasures,TakencoalfaceofNO.92116inXinjingCoalMineofYangCoalGroupastheresearchobject.Consideringthecoalfaceadvancingspeed,airquantityofintakeairflowroadway,thicknessofleftmineingob,thegasam
5、ountofmineincoalminingarea,initialgasemissionrateofworkingfaceofcoalwallandothermeasuredparameters,theperfectmathematicalphysicsmodelofgasemissioningobwasEstablished.Thevarianceofresultsofnumericalsimulationandmeasuredresultswaslessthan15.Thesimulationresultsshowthatgasconcentrationinthefir
6、stlinkroadwayingob,gasconcentrationinreturn—airroadway,gasconcentrationinuppercornerincreasedwithworkingfaceadvancingspeedgrowthintheformofLangmuirfunction,withairquantityofintakeair-flowroadwaygrowthdecreasedinexponentialform.accordingtOthisproblemofgasoverrunninginthefirstlinkroadwayingob
7、,governanceeffectofextraction-gasmeasuresinthescendlinkroadwayingobwasanalyzedquantitatively.Keywords:thecoalface;advancingspeed;airquantityofintakeairflowroadway;the1inkroadwayingob;gasconcentration;extraction-gasmeasuresingob随着工作面日产煤量增大,传统的U型通风系收稿日期:2O
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