确定岩质边坡安全阈值的新方法
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摘要
应用二维离散单元程序UDEC,以黄麦岭磷矿采场岩质边坡为例,通过分析边坡质点位移矢量的变化规律,定义了边坡的极限平衡状态和破坏状态,提出一种新的确定安全速度阈值的方法,并确定了黄麦岭磷矿采场岩质边坡的安全速度阈值。分析结果表明,新方法确定的安全阈值与现场监测确定的阈值吻合得较好。因此,应用该法来确定边坡的安全阈值是可行的。
The limited equilibrium and destroyed status of rock slope are defined based on the change of displacement vector by UDEC simulation. A new method to determine the safety threshold velocity of slope under explosion is proposed based on the definition. In addition, the safety threshold velocity of the Huangmailing Phosphorite rock slope is suggested. The obtained safety threshold velocity by the new method is in good agreement with the measurement. To determine the safety threshold velocity of rock slope by the proposed method is applicable.
The limited equilibrium and destroyed status of rock slope are defined based on the change of displacement vector by UDEC simulation. A new method to determine the safety threshold velocity of slope under explosion is proposed based on the definition. In addition, the safety threshold velocity of the Huangmailing Phosphorite rock slope is suggested. The obtained safety threshold velocity by the new method is in good agreement with the measurement. To determine the safety threshold velocity of rock slope by the proposed method is applicable.
引文
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[2] 张永哲,甄胜利.漫湾电站开挖爆破对高边坡动力稳定影响的分析研究[J].工程爆破,1996,2(1):1-11.ZHANGYong zhe,ZHENGShen li.Studyoneffectofexcavationblastingondynamicstabilityofhighrockslopeatmanwanhydropowerstation[J].EngineeringBlasting,1996,2(1):1-11.
[3] 卢文波,赖世骧,朱传云,等.三峡工程岩石基础开挖爆破震动控制安全标准[J].爆炸与冲击,2001,21(1):68-71.LUWen bo,LAIShi xiang,ZHUChuan yun,etal.SafetystandardsofblastingvibrationsadoptedinrockbaseexcavationofThreeGorgeProject[J].ExplosionandShockWaves,2001,21(1):68-71.
[4] 张时忠,张天锡,吴立.爆破施工对边坡稳定性影响初探[J].中国地质灾害与防治学报,1996,7(1):39-43.ZHANGShi zhong,ZHANGTian xi,WULi.Anapproachtoslopestabilityduetoblastingexcavation[J].TheChineseJournalofGeologicalHazardandControl,1996,7(1):39-43.
[5] 黎剑华,张龙,颜荣贵.爆破地震波作用下的边坡失稳机理与临界振速[J].矿冶,2001,10(1):11-15.LIJian hua,ZHANGLong,YANRong gui.Mechanismofrockslopeunstabilityandcriticalvibrationvelocityundertheactionofblastingseismwave[J].MiningandMetallurgy,2001,10(1):11-15.
[6] 宋光明,史秀志,陈寿如.露天矿边坡爆破振动破坏判据新方法及应用[J].中南工业大学学报,2000,31(6):485-488.SONGGuang ming,SHIXiu zhi,CHENShou ru.Newmethodfordeterminingblastingvibrationdamagecriteriononopen pitslopeanditsapplication[J].JournalofCentSouthUnivTechnol,2000,31(6):485-488.
[7] UDEC(UniversalDistinctElementCode)User'sManual[Z].Version3.0.ItascaConsultingGroupInc,1996.
[8] 湖北省鄂东北地质大队.湖北省孝感磷矿黄麦岭矿区黄麦岭矿段详细勘探总结报告[R].1986.
[9] LysmerJ,KuhlemeyerR.Finitedynamicsmodelforinfinitemedia[J\〗.JEngMech,ASCE,1969,95:859-877.
[10] 刘亚群 爆破荷载作用下岩质边坡动态响应的数值模拟研究[D].武汉:中国科学院武汉岩土力学研究所,2003.
[11] 李海波,高建光,李俊茹,等.黄麦岭磷矿采场爆破振动监测、声波检测及爆破设计优化报告[R].武汉:中国科学院武汉岩土力学研究所,2000.
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