破碎带工程围岩超前锚杆加固拱结构
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摘要
在破碎带岩层开挖时,顶板极易垮落,通常采用超前锚杆加固来做辅助支护.为了研究工程围岩超前锚杆加固机理及其位移变化规律,把这种开挖形成的拱看成有几何缺陷的圆弧拱.以武平紫金矿业230斜坡道在破碎带中超前锚杆加固为工程实例,利用屈曲理论及薄膜理论对其位移的变化进行了力学分析,完善了前人对这种加固拱简化的问题.
When the rock is difficult to cut and support in fracture zones,forepoling is usually used as auxiliary reinforcement support.In order to study the arch structure mechanism of bolt forepoling in surrounding fractured rock and its displacement evolution,bolt forepoling at the Ramp 230 in Wupin Zijin Mining Company was taken as an example,and the displacement evolution of the arch structure,which is taken as a flawed one,was analyzed on the basis of the buckling theory and the membrane theory.This study improves the simplification problem of reinforced arches.
When the rock is difficult to cut and support in fracture zones,forepoling is usually used as auxiliary reinforcement support.In order to study the arch structure mechanism of bolt forepoling in surrounding fractured rock and its displacement evolution,bolt forepoling at the Ramp 230 in Wupin Zijin Mining Company was taken as an example,and the displacement evolution of the arch structure,which is taken as a flawed one,was analyzed on the basis of the buckling theory and the membrane theory.This study improves the simplification problem of reinforced arches.
引文
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[2]Jiang C X,Liu Z X.Experimental research on rock bolts installed around periphery of roadway for forepoling∥Advance in Geome-chanics.Beijing:China Prospect Publishing House,1990:164(姜春旭,刘之详.超前围壁锚杆支护结构的模拟试验研究∥岩土力学进展.北京:中国展望出版社,1990:164)
[3]Tao L G,Hou G Y.Experimental research on the pre-reinforce-ment mechanism of fore poling bolt and its arching mechanical model.JChina Univ Min Technol,1995(3):35(陶龙光,侯公羽.超前锚杆预支护机理的模拟试验与成拱力学模型研究.中国矿业大学学报,1995(3):35)
[4]Tao L G,Hou G Y.Experimental research on the pre-reinforce-ment mechanism of forepoling bolt.Coal Sci Technol,1995,23(5):14(陶龙光,侯公羽.超前锚杆预支护模拟试验.煤炭科学技术,1995,23(5):14)
[5]Xu B Y,Liu X S.Applied Elastic-plastic Mechanics.Beijing:Tsing-hua University Press,1995:488(徐秉业,刘信声.应用弹塑性力学.北京:清华大学出版社,1995:488)
[6]Xu Z L.Elasticity Mechanics.Beijing:Higher Education Press,1990:258(徐芝伦.弹性力学.北京:高等教育出版社,1990:258)
[7]Zhang J,Ellingwood B.Orthogonal series expansions of random fields in reliability analysis.JEng Mech,1994,120(12):2660
[8]Yi Z P,Zhao Y Y,Zhu K Z,et al.The effects of geometrical im-perfections on dynamic stability of arch structures.J Earthquake Eng Eng Vib,2009,29(2):29(易壮鹏,赵跃宇,朱克兆,等.几何缺陷对拱结构动力稳定性的影响.地震工程与工程振动,2009,29(2):29
[9]Pi Y L,Trahair N S.Non-linear buckling and postbuckling of elastic arches.Eng Struct,1998,20(7):571
[10]Pi Y L,Bradford MA,Uy B.In-plane stability of arches.Int J Solids Struct,2002,39(1):105
[11]Ovesy H R,Fazilati J.Stability analysis of composite laminated plate and cylindrical shell structures using semi-analytical finite strip method.Compos Struct,2009,89:467
[12]Leca E,New B.Settlements induced by tunneling in soft ground.Tunnelling Underground Space Technol,2007,22:119
[13]Darrag A A.Ground stabilization for tunnel construction in mixed-face conditions.Tunnelling Underground Space Technol,1999,14:319
[2]Jiang C X,Liu Z X.Experimental research on rock bolts installed around periphery of roadway for forepoling∥Advance in Geome-chanics.Beijing:China Prospect Publishing House,1990:164(姜春旭,刘之详.超前围壁锚杆支护结构的模拟试验研究∥岩土力学进展.北京:中国展望出版社,1990:164)
[3]Tao L G,Hou G Y.Experimental research on the pre-reinforce-ment mechanism of fore poling bolt and its arching mechanical model.JChina Univ Min Technol,1995(3):35(陶龙光,侯公羽.超前锚杆预支护机理的模拟试验与成拱力学模型研究.中国矿业大学学报,1995(3):35)
[4]Tao L G,Hou G Y.Experimental research on the pre-reinforce-ment mechanism of forepoling bolt.Coal Sci Technol,1995,23(5):14(陶龙光,侯公羽.超前锚杆预支护模拟试验.煤炭科学技术,1995,23(5):14)
[5]Xu B Y,Liu X S.Applied Elastic-plastic Mechanics.Beijing:Tsing-hua University Press,1995:488(徐秉业,刘信声.应用弹塑性力学.北京:清华大学出版社,1995:488)
[6]Xu Z L.Elasticity Mechanics.Beijing:Higher Education Press,1990:258(徐芝伦.弹性力学.北京:高等教育出版社,1990:258)
[7]Zhang J,Ellingwood B.Orthogonal series expansions of random fields in reliability analysis.JEng Mech,1994,120(12):2660
[8]Yi Z P,Zhao Y Y,Zhu K Z,et al.The effects of geometrical im-perfections on dynamic stability of arch structures.J Earthquake Eng Eng Vib,2009,29(2):29(易壮鹏,赵跃宇,朱克兆,等.几何缺陷对拱结构动力稳定性的影响.地震工程与工程振动,2009,29(2):29
[9]Pi Y L,Trahair N S.Non-linear buckling and postbuckling of elastic arches.Eng Struct,1998,20(7):571
[10]Pi Y L,Bradford MA,Uy B.In-plane stability of arches.Int J Solids Struct,2002,39(1):105
[11]Ovesy H R,Fazilati J.Stability analysis of composite laminated plate and cylindrical shell structures using semi-analytical finite strip method.Compos Struct,2009,89:467
[12]Leca E,New B.Settlements induced by tunneling in soft ground.Tunnelling Underground Space Technol,2007,22:119
[13]Darrag A A.Ground stabilization for tunnel construction in mixed-face conditions.Tunnelling Underground Space Technol,1999,14:319
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