软岩巷道锚注结构承载特性的时变规律与初步应用
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
针对软岩巷道锚注结构承载特性的时变特征,尝试将锚注结构的承载力视为时变值,并将巷道周边弹性区、塑性区以及锚注区简化为厚壁圆筒的受力分析问题,通过引入弹黏塑性本构模型,得到了锚注结构承载力的计算公式,理论分析表明:流变停止所需的锚注结构承载力以及流变量随Pb(原岩应力)与s(拉伸屈服极限)比值的增大而升高,流变特性更为显著、支护难度增加;锚注支护强度及范围的减小,导致流变停止所需的承载力以及流变量升高,是造成锚注结构失效、流变加剧的主要原因,而流变停止所需的承载力又与锚注参数密切相关,合理确定锚注参数保证流变停止时锚注结构的稳定至关重要。理论计算结果较好的反映了锚注结构承载力随流变变形增加而逐渐增大的时变规律,且与现场实测结果较为吻合,对软岩巷道锚注支护设计可起到一定的指导作用。
Regarding the time-dependent behaviors of the bolting and grouting structure in soft rock roadway,the bearing capacity of bolt-grouting structure is treated as time-dependen value,and the elastic zone,plastic zone and bolt-grouting zone around the roadway are simplified as the stress analysis problem of a thick walled cylinder.Based on an elastic-viscoplastic constitutive model,the formulas for the bearing capacity of bolt-grouting structure are attained.The results show that the needed bearing capacity of bolt-grouting structure to stop rheology and rheological convergence/deformation increases with the increase of the ratio of Pb(original rock stress) to s(Tensile yield limit),and the more apparent the rheological features the more the support difficulty.The main reason for support failure and serious rheology is that the needed bearing capacity to stop rheology and rheological deformation increases because of the decrease of support strength and range.The value of the bearing capacity has close relationship with the bolt-grouting parameters,and it is very important that the appropriate bolt-grouting parameters can guarantee the stability of the bolt-grouting structure when rheology ends.The theoretical results reflect well the time-dependent laws of bearing capacity of bolt-grouting structure increasing with the increase of the rheological deformation,and they agree with the field observations,thus playing a great role in the design of bolt-grouting support structure in soft rock roadway.
引文
[1]柏建彪,王襄禹,贾明魁,等.深部软岩巷道支护原理及应用[J].岩土工程学报,2008,30(5):632–635.(BAIJian-biao,WANG Xiang-yu,JIA Ming-kui,et al.Theory andapplication of supporting in deep soft roadways[J].ChineseJournal of Geotechnical Engineering,2008,30(5):632–635.(in Chinese))
    [2]韩立军,贺永年.破裂岩体注浆加锚特性模拟数值试验研究[J].中国矿业大学学报,2005,34(4):418–422.(HANLi-jun,HE Yong-nian.Numerical experimental study onmechanical characteristics of cracked rock mass reinforcedby bolting and grouting[J].Journal of China University ofMining&Technology,2005,34(4):418–422.(in Chinese))
    [3]张百红,韩立军,王延宁,等.深井软岩巷道锚注支护结构承载特性[J].采矿与安全工程学报,2007,24(2):160–164.(ZHANG Bai-hong,HAN Li-jun,WANG Yan-ning,et al.Carrying capacity of deep mine soft rock roadway supportedby bolting and groutin[J].Journal of Mining&SafetyEngineering,2007,24(2):160–164.(in Chinese))
    [4]刘福胜.基于非线性分析的锚注支护机理研究[D].济南:山东科技大学,2006.(LIU Fu-sheng.Study aboutmechanism of bolting-grouting support based on nonlinearanalysis[D].Jinan:Shandong University of Science andTechnology,2006.(in Chinese))
    [5]杨新安,黄宏伟.围岩变形内表比及一种新的巷道围岩分类法[J].岩土工程学报,1998,20(3):23–26.(YANGXin-an,HUANG Hong-wei.Ratio of internal to externaldeformation of surrounding rocks and a new kind ofclassification for tunnel surrounding rocks[J].ChineseJournal of Geotechnical Engineering,1998,20(3):23–26.(in Chinese))
    [6]宋丽,廖红建,韩剑.软岩三维弹黏塑性本构模型[J].岩土工程学报,2009,31(1):83–88.(SONG Li,LIAOHong-jian,HAN Jian.Three-dimensional nonlinear elasticviscoplastic constitutive model of soft rock[J].ChineseJournal of Geotechnical Engineering,2009,31(1):83–88.(in Chinese))
    [7]王连国,李明远,王学智.深部高应力极软岩巷道锚注支护技术研究[J].岩石力学与工程学报,2005,24(16):2889–2893.(WANG Lian-guo,LI Ming-yuan,WANG Xue-zhi.Study on mechanisms and technology for bolting and grotingin special soft rock roadways under high stress[J].ChineseJournal of Rock Mechanics and Engineering,2005,24(16):2889–2893.(in Chinese))
    [8]范秋雁,阳克青,王渭明.泥质软岩蠕变机制研究[J].岩石力学与工程学报,2010,29(8):1555–1561.(FAN Qiu-yan,YANG Ke-qing,WANG Wei-ming.Study of creepmechanism of argillaceous soft rocks[J].Chinese Journal ofRock Mechanics and Engineering,2010,29(8):1555–1561.(in Chinese))
    [9]刘泉生,卢兴利.煤矿深部巷道破裂围岩非线性大变形及支护对策研究[J].岩土力学,2010,31(10):3273–3279.(LIQuan-sheng,LU Xing-li.Research on nonlinear largedeformation and support measures for broken surroundingrocks of deep coal mine roadway[J].Rock and SoilMechanics,2010,31(10):3273–3279.(in Chinese))
    [10]陆银龙,王连国,张蓓,等.软岩巷道锚注支护时机优化研究[J].岩土力学,2012,33(5):1395–1401.(LUYin-long,WANG Lian-guo,ZHANG Bei,et al.Optimizationof bolt-grouting time for soft rock roadway[J].Rock and soilMechanics,2012,33(5):1395–1401.(in Chinese))
    [11]毕心祝,吕凡任,谢广祥.锚注软岩巷道流变研究[J].岩石力学与工程学报,2003,22(2):297–303.(BI Xin-zhu,LüFan-ren,XIE Guang-xiang.Rheological study onbolt-grouting supported roadways in soft rock[J].ChineseJournal of Rock Mechanics and Engineering,2003,22(2):297–303.(in Chinese))
    [12]王连国,张建,李海亮.软岩巷道锚注支护结构蠕变分析[J].中国矿业大学学报,2009,38(5):607–612.(WANGLian-guo,ZHANG Jian,LI Hai-liang.A creep analysis of abolt-grouting support structure within a soft rock roadway[J].Journal of China University of Mining&Technology,2009,38(5):607–612.(in Chinese))
    [13]刘全林,杨敏.软弱围岩巷道锚注支护机理及其变形分析[J].岩石力学与工程学报,2002,21(8):1158–1161.(LIU Quan-lin,YANG Min.Analysis on deformation ofsurrounding rock masses of runnel using bolt-groutingsupport and its mechanism[J].Chinese Journal of RockMechanics and Engineering,2002,21(8):1158–1161.(inChinese))
    [14]侯公羽,李晶晶,裘彬,等.恒载作用下轴对称圆巷围岩的流变变形方程求解[J].岩土力学,2011,32(2):341–346.(HOU Gong-yu,LI Jing-jing,QIU Bin,et al.Solvingequation of rheological deformation in axisymmetric roundwell under dead load[J].Rock and soil Mechanics,2011,32(2):341–346.(in Chinese))
    [15]贾乃文.黏塑性力学及工程应用[M].北京:地震出版社,2000.(JIA Nai-wen.Viscoplasticity mechanics andengineering applications[M].Beijing:Earthquake Press,2000.(in Chinese))
    [16]侯公羽,牛晓松.基于Levy-Mises本构关系及D-P屈服准则的轴对称圆巷理想弹塑性解[J].岩土力学,2009,30(6):1555–1562.(HOU Gong-yu,NIU Xiao-song.Perfectelastoplastic solution of axisymmetric circular openings inrock mass based on Levy-Mises constitutive relation and D-Pyield criterion[J].Rock and Soil Mechanics,2009,30(6):1555–1562.(in Chinese))

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心