露天矿高陡边坡稳定性评价及综合加固措施
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摘要
以某露天矿高陡边坡为例,采用ANSYS有限元软件对边坡进行稳定性评价,针对A区边坡稳定性差且易风化的特点,采取预应力锚索和喷射混凝土护坡综合加固措施,有效增强边坡的整体稳定性。考虑岩体受断层、节理面、裂隙面等软弱结构面以及其中的岩体结构优势面等综合影响,利用经验法对岩体强度参数进行折减。为确保边坡在采矿过程中的安全稳定,利用ANSYS软件验算预应力锚索加固后边坡的稳定性,结果显示边坡稳定性系数达到规范要求,并采用GPS-RTK系统对边坡进行跟踪监测,为矿山的安全高效开采提供有效指导。
Taken a high steep open pit slope as an example,ANSYS finite element software is carried out on the slope stability evaluation,in view of the poor stability and easy weathering characteristics of region A slope,the comprehensive reinforcement method is adopted by use of the prestressed anchor cable and shotcrete support to increase whole stability of the rock slope.This paper uses the empirical method to make reduction for rock mass strength parameters,which considers the combination influence of many factors such as fault,joint plane,fissureplane,rock mass and its structure plane and so on.To ensure the security and stability of slope in the mining process,stability of the slope is checked by using the ANSYS software after reinforcement by the prestressed anchor cable,the stability coefficient meet requirement,and the GPS-RTK system is used for tracking slope monitoring,it provides guidance for safe and efficient mining.
Taken a high steep open pit slope as an example,ANSYS finite element software is carried out on the slope stability evaluation,in view of the poor stability and easy weathering characteristics of region A slope,the comprehensive reinforcement method is adopted by use of the prestressed anchor cable and shotcrete support to increase whole stability of the rock slope.This paper uses the empirical method to make reduction for rock mass strength parameters,which considers the combination influence of many factors such as fault,joint plane,fissureplane,rock mass and its structure plane and so on.To ensure the security and stability of slope in the mining process,stability of the slope is checked by using the ANSYS software after reinforcement by the prestressed anchor cable,the stability coefficient meet requirement,and the GPS-RTK system is used for tracking slope monitoring,it provides guidance for safe and efficient mining.
引文
[1]肖武.基于强度折减法和容重增加法的边坡稳定分析及工程研究[D].南京:河海大学,2005.
[2]孙广忠.工程地质与地质工程[M].北京:地震出版社,1993.
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[4]王勖成,邵敏.有限单元法基本原理和数值方法[M].北京:清华大学出版社,1997:483-487.
[5]张季如.边坡开挖的有限元模拟和稳定性评价[J].岩石力学与工程学报,2002,21(6):843-847.
[6]Zhang J R,Peng S M,Qi S,et al.Analysis and treatment of slide in Daganping[C]//Shen Z J,Law G Y,Fellenius B H edited,Proceedings of Second International Conference on Soft Soil Engineering.Nanjing:Hohai University Press,1996:554-559.
[7]赵尚毅,郑颖人,时卫民,等.用有限元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346.
[8]Wang Q,Zhang P Z,Jeffery,et al.Present-day crustal deformation in China constrained by global position system measurements.Science,2001,294:574-577.
[9]郑颖人,陈祖煜,王恭先,等.边坡与滑坡工程治理[M].2版.北京:人民交通出版社,2010.
[10]苗胜军,蔡美峰,夏训清,等.深挖露天矿GPS边坡变形监测[J].北京科技大学学报,2006,28(6):515-518.
[11]高谦,赵静波,吴学民.预应力锚索加固边坡应用及稳定性分析[J].矿业工程,2004,2(3):9-12.
[2]孙广忠.工程地质与地质工程[M].北京:地震出版社,1993.
[3]郑颖人,赵尚毅,张鲁渝.用有限元强度折减法进行边坡稳定分析[J].中国工程科学,2002,4(10):57-61.
[4]王勖成,邵敏.有限单元法基本原理和数值方法[M].北京:清华大学出版社,1997:483-487.
[5]张季如.边坡开挖的有限元模拟和稳定性评价[J].岩石力学与工程学报,2002,21(6):843-847.
[6]Zhang J R,Peng S M,Qi S,et al.Analysis and treatment of slide in Daganping[C]//Shen Z J,Law G Y,Fellenius B H edited,Proceedings of Second International Conference on Soft Soil Engineering.Nanjing:Hohai University Press,1996:554-559.
[7]赵尚毅,郑颖人,时卫民,等.用有限元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346.
[8]Wang Q,Zhang P Z,Jeffery,et al.Present-day crustal deformation in China constrained by global position system measurements.Science,2001,294:574-577.
[9]郑颖人,陈祖煜,王恭先,等.边坡与滑坡工程治理[M].2版.北京:人民交通出版社,2010.
[10]苗胜军,蔡美峰,夏训清,等.深挖露天矿GPS边坡变形监测[J].北京科技大学学报,2006,28(6):515-518.
[11]高谦,赵静波,吴学民.预应力锚索加固边坡应用及稳定性分析[J].矿业工程,2004,2(3):9-12.
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