爆破模拟对柔弱夹层顺层边坡的稳定性诊断
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摘要
将处于静态平衡状态的柔弱夹层顺层岩体边坡在爆破振动作用下的滑移失稳问题,视为层面抗剪强度指标(φ、c)弱化造成的.通过爆破振动试验分析发现,在层面强度及振动频率一定时,随着爆破振动引起的质点振动速度的增加,柔弱夹层等效动内摩擦角和等效动粘聚力弱化值逐渐增大,且它们与爆破振引起的质点振动速度成幂函数关系,利用其关系可判断爆破振动作用下柔弱层面性质的顺层边坡的动稳定性.
The slip instability problem of static equilibrium state of the weak interlayer bedding rock slope under the action of the blasting vibration was regarded as indicators of level of shear strength(φ,C) weakening caused.By blasting vibration test analysis,when the level of intensity and frequency fixed,with the increasing of particle vibration velocity caused by blasting vibration,the weakening value of weak interlayer equivalent dynamic internal friction angle and equivalent of dynamic cohesion gradually increase.Then with the blasting vibration velocity is a power function relationship,using their relationship,we get determine weak interlayer bedding slope stability,under the action of blasting vibration.
The slip instability problem of static equilibrium state of the weak interlayer bedding rock slope under the action of the blasting vibration was regarded as indicators of level of shear strength(φ,C) weakening caused.By blasting vibration test analysis,when the level of intensity and frequency fixed,with the increasing of particle vibration velocity caused by blasting vibration,the weakening value of weak interlayer equivalent dynamic internal friction angle and equivalent of dynamic cohesion gradually increase.Then with the blasting vibration velocity is a power function relationship,using their relationship,we get determine weak interlayer bedding slope stability,under the action of blasting vibration.
引文
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[10]刘勇,张继春,肖清华.振动作用下顺层岩质边坡滑移失稳的试验研究[J].路基工程.2008(2):3-5.
[2]林大能,唐业茂,范金国.爆破震动作用下高边坡稳定性分析[J].矿业工程研究,2009,24(1):25-26.Ling D N,Tang Y M,Fan J G.Analysis of slope stability underblasting vibration[J].Mineral Engineering Research,2009,24(1):25-26.
[3]陈朝玉,黄文辉,谭华.振动对松软含煤夹层顺层边坡稳定性影响的模型研究[J].矿业工程研究,2010,25(2):29-32.Chen C Y,Huang W H,Tan H.Model experimental study the affectof vibration on the soft coal sandwich bedding slope stability[J].MineralEngineering Research,2010,25(2):29-32.
[4]姜立春,陈嘉生.基于AMD和爆破荷载耦合作用下的深凹露天煤边坡失稳研究[J].湖南科技大学学报(自然科学版),2007,22(2):17-22.Jiang L C,Chen J S.Study on instability of concave slope in open pitby AMD and explosive loading[J].Journal of Hunan University ofScience&Technology(Natural Science Edition),2007,22(2):17-22.
[5]董陇军,李夕兵,赵国彦,等.露天采矿爆破振动对砌体结构破坏效应预测的Fisher判别模型及应用[J].岩石力学与工程学报,2009,211(4):750-759.Dong L J,Li X B,Zhao G Y,et al.Fisher discriminant analysismodel and its application to predicting destructive effect of masonrystructure under blasting vibration of open-pit mine[J].Chinese Journalof RockMechanics and Engineering,2009,211(4):750-759.
[6]张学民,阳军生,刘宝琛.层状岩体中邻近双线隧道爆破的振动响应研究[J].湖南科技大学学报(自然科学版),2006,21(4):70-74.Zhang X M,Yang J S,Liu B C.Study on blasting seismic dynamiceffect for tunnels with close interval in bedded rock mass[J].JournalofHunan University of Science&Technology(Natural ScienceEdition),2006,21(4):70-74.
[7]杨伟林,杨柏坡.爆破地震效应的数值模拟分析[J].地震工程与工程振动,2005,25(1):8-13.Yang W L,Yang B P.Numerical analysis explosion seismic effect[J].Earthquake Engineering Vibration,2005,25(1):8-13.
[8]张玉池,温佩琳,张兆京.岩石边坡失稳的瑞利面波频散响应特征[J].湖南科技大学学报(自然科学版),2008,23(2):57-60.Zhang Y C,Wen P L,Zhang Z J.The ray leigh-wave dispersion curveresponse feature of the rock type slope failure.Journal of HunanUniversity of Science&Technology(Natural Science Edition),2008,23(2):57-60.
[9]朱传云,赖世骧,卢文波,等.爆破振动对岩体结构面影响的室内试验研究[J].工程爆破,1996,2(4):51-54.Zhu C Y,Lai S X,Lu W B,et.al.Laboratory study of blastingvibration effects on the rock surface structure[J].Blasting,1996,2(4):51-54.
[10]刘勇,张继春,肖清华.振动作用下顺层岩质边坡滑移失稳的试验研究[J].路基工程.2008(2):3-5.
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