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ID:34473009
大小:2.36 MB
页数:7页
时间:2019-03-06
《直墙半圆拱形钢管混凝土支架力学性能实验及应用》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、直墙半圆拱形钢管混凝土支架力学性能实验及应用112134高延法,王军,黄万朋,陈冰慧,王亮,王超(1.中国矿业大学,北京100083;2.山东科技大学,山东青岛266510;3.中煤国际工程集团北京华宇工程有限公司,北京100120;4.大地工程开发(集团)有限公司,北京100102)摘要:为研究直墙半圆拱形断面巷道面临的支护难题,设计了直墙半圆拱形钢管混凝土支架与U型钢支架力学性能对比实验;实验全面测试并分析了钢管混凝土支架的承载力、位移与应变,同时分析了热煨弯曲对钢管原材料抗拉性能的影响及C60混凝土配合比合理性;实验证明钢管混凝土支架具有突出的承载优势。在实验指导下,对华丰矿-1100水
2、平大巷动压巷道和大淑村矿-450水平新东翼皮带巷高应力集中巷道做了直墙半圆拱形钢管混凝土支架支护设计并应用,实践证明钢管混凝土支架支护效果明显,优于同断面U型钢支架,同时也发现直墙半圆拱形封闭支架的底角为薄弱点,并进行了改进与结构强化。关键词:钢管混凝土支架;直墙半圆拱断面;力学性能实验;巷道支护DOI:10.3973/j.issn.1672-741X.2014.01.002中图分类号:U45文献标志码:A文章编号:1672-741X(2014)01-0006-07ExperimentonMechanicalPropertyofStraightwallSemicirclearchConcr
3、etefilledSteelTubeSupportanditsApplication112134GAOYanfa,WANGJun,HUANGWanpeng,CHENBinghui,WANGLiang,WANGChao(1.ChinaUniversityofMining&Technology,Beijing100083,China;2.ShandongUniversityofScienceandTechnology,Qingdao266510,Shandong,China;3.BeijingHuayuEngineeringCo.,Ltd.,SinoCoalInternationalEngin
4、eeringGroup,Beijing100120,China;4.GeotechnicalEngineeringDevelopment(Group)Co.,Ltd.,Beijing100102,China)Abstract:MechanicalpropertyexperimentisdesignedtocomparetheperformanceofstraightwallsemicirclearchconcretefilledsteeltubesupportandthatofUshapedsteelsupport,soastosolvetheinstabilityproblemoft
5、hesupportforroadwayswithconventionalstraightwallsemicirclearchcrosssection.Intheexperiment,theloadbearingcapacity,displacementandstrainoftheconcretefilledsteeltubesupportaremeasuredandanalyzed,andtheinfluenceoftheroastedbendontheantitensioningpropertyoftherawmaterialofthesteeltubes,aswellasther
6、ationalityofthemixingratiooftheC60concrete,areanalyzed.Theexperimentshowsthattheconcretefilledsteeltubesupporthasoutstandingloadbearingadvantages.Guidedbytheexperimentresults,straightwallsemicirclearchconcretefilledsteeltubesupportisdesignedandappliedforthe1100horizontaldynamicpressureroadwayof
7、Huafengcoalmineandthe450levelneweastwinghighstressroadwayofDashucuncoalmine.ThepracticeshowsthattheconcretefilledsteeltubesupporthasgoodsupportingeffectandissuperiortotheUshapedsteelsupportwiththes
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