欢迎来到天天文库
浏览记录
ID:52947051
大小:408.25 KB
页数:6页
时间:2020-04-02
《高压线铁塔下放顶煤开采及其安全性研究.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28卷第2期采矿与安全工程学报V01.28No.22011年06月JournalofMining&SafetyEngineeringJune2011文章编号:1673—3363(2011)02—0267—06高压线铁塔下放顶煤开采及其安全性研究郭文兵,郑彬(1.河南理工大学能源科学与工程学院,河南焦作454000;2.中煤国际工程集团武汉设计研究院,湖北武汉43OO64)摘要为了开采高压线铁塔下压煤,并保护铁塔的安全,采用地表移动变形预计与现场实测相结合的方法,从采动引起的铁塔基础不均匀沉降量、高压线铁塔的倾斜、转角、根开以及铁塔
2、下沉速度等方面分析研究了放顶煤开采影响下高压输电线路铁塔的安全性.研究结果表明:高压线塔基础不均匀沉降量、铁塔的倾斜值均超过一般建筑物的Ⅳ级损害标准,高压线铁塔抵抗地表变形能力大于一般建(构)筑物;铁塔中心的下沉速度随工作面推进过铁塔距离的增大呈对数关系衰减;高压线对铁塔的变形有约束和协同变形作用,使采动过程中铁塔塔身倾斜变形不一致,出现明显的挠度.研究结果指导了高压线铁塔下采煤,高压线铁塔采动影响期间运行良好,实现了高压线铁塔下安全采煤.关键词放顶煤开采;高压线铁塔;安全性;地表移动变形;协同变形中图分类号TD325文献标识码AS
3、tudyofCoalCavingMiningUndertheSteelTowerofHigh—VoltageTransmissionLineandItsSafetyGUOWen—bing,ZHENGBin(1.SchoolofEnergyScienceandEngineering,HenanPolytechnicUniversity,Jiaozuo,Henan454000,China;2.WuhanDesignandResearchInstitute,ChinaCoalInternationalEngineeringGroup,Wu
4、han,Hubei430064,China)AbstractInordertoexploitthecoalunderthesteeltowerofhigh—voltagetransmissionlineandensurethesafetyofthetower,westudiedthesafetyofsuchtoweraffectedbycavingmin—ing,basedonthedataoffieldobservationandsurfacemovementanddeformationpredicting,fromthefoll
5、owingaspects:unevensubsidenceofthetowerfoundations,slopeofthetower,torsion,spacebetweentowerfoundationsandsubsidencevelocityofthetower.Theresultsin—dicatethattheunevensubsidenceofthetowerfoundationsandthetowerslopeexceedthebandfourdamagecriterionofcommonstructures.Thes
6、urfacedeformationofwhichthetowercanresistiSgreaterthanthatofcommonstructures.Theresultsalsodemonstratethatthesurfacesubsidencevelocityofthetowercentredecreaseswiththeincreaseofthedistancebetweenthetowerandfacelineinalogarithmrelationship.Thehigh—voltagetransmissionline
7、shaveare—strictioneffectonthetowerdeformationandsynergydeformationwiththetower.TheslopeofthetowerstructureiSdifferentfromthetoptobottomduringunderminingandthetowerstruc—tureisobviouslycurved.Theseresultshavebeenusedtoguidetheminingpracticeunderthehigh-voltagetransmissi
8、on1inetower.Thetowerrunswellandisquitesafeduringtheminingactivity.Keywordstopcoalcavingmining;high-voltagetransmissio
此文档下载收益归作者所有