复杂裂隙岩体环境下地下厂房轴线方向优化选择研究
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摘要
抽水蓄能电站地下厂房轴线方向选择是前期勘察工作的重点.以芝瑞电站为工程背景,所研究的地下厂房围岩岩性为熔岩角砾岩,岩性较单一,结构面以Ⅳ级、Ⅴ级为主,岩体裂隙发育,完整性差,岩体结构以镶嵌～次块状结构为主.以块体理论为基础,运用Unwedge程序,充分分析不同结构面组合切割下的围岩稳定情况,以最小安全系数的最大值为取值原则,对复杂裂隙岩体环境下地下厂房轴线方向优化选择进行了系统研究.结果表明:研究区地下厂房轴线方向宜为NE50°.通过分析证明,块体理论在中低地应力区复杂裂隙岩体环境下地下厂房轴线方向优化选择中具有重要的现实意义.
The decision of underground power plant axis direction is vital for previous investigations of a pumped-storage power station. This paper took Zhirui Power Station as the project background,where the surrounding rock lithology of the underground powerhouse was relatively simple with lava breccias,the structure of rock mass is predominantly mosaic to sub-massive,with mainly Grade IV and V structural planes,well-developed fissures and poor integrity. The optimal selection of underground power plant axis direction under complicated fractured rock mass environment was systematically studied. The research comprehensively analyzed the stability of surrounding rock under the combination of different structure planes cutting by using Unwedge program on the base of block theory and value principle of the maximum value of the minimum safety factor. The results showed that the axis direction of underground power plant in study area should be NE50°,demonstrating that block theory had practical significance in optimizing the axis direction of underground power plant under complicated fractured rock mass environment in the low-medium stress area.
The decision of underground power plant axis direction is vital for previous investigations of a pumped-storage power station. This paper took Zhirui Power Station as the project background,where the surrounding rock lithology of the underground powerhouse was relatively simple with lava breccias,the structure of rock mass is predominantly mosaic to sub-massive,with mainly Grade IV and V structural planes,well-developed fissures and poor integrity. The optimal selection of underground power plant axis direction under complicated fractured rock mass environment was systematically studied. The research comprehensively analyzed the stability of surrounding rock under the combination of different structure planes cutting by using Unwedge program on the base of block theory and value principle of the maximum value of the minimum safety factor. The results showed that the axis direction of underground power plant in study area should be NE50°,demonstrating that block theory had practical significance in optimizing the axis direction of underground power plant under complicated fractured rock mass environment in the low-medium stress area.
引文
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[10]陈庆发,周永亮,安佳丽.复杂裂隙岩体环境下巷道轴线走向优化研究[J].岩石力学与工程学报,2014,33(增1):2735-2442.CHEN Q F,ZHOU Y L,AN J L.Study of optimization for axis strike of roadway under environment of complex fractured rock mass[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(Supplement 1):2735—2442.(In Chinese)
[11]郝杰,侍克斌.基于块体和松动压力理论的隧洞围岩稳定性分析[J].地下空间与工程学报,2015,11(3):626-631.HAO J,SHI K B.Analysis on stability of the surrounding rock in tunnel based on block and loose pressure theory[J]. Chinese Journal of Underground Space and Engineering,2015,11(3):626—631.(In Chinese)
[12]董家兴,徐光黎,申艳军,等.基于块体理论的岩壁吊车梁岩台稳定性分析[J].地下空间与工程学报,2011,7(3):444-448.DONG J X,XU G L,SHEN Y J,et al.Analysis of stability for cliff crane beam based on key block theory[J].Chinese Journal of Underground Space and Engineering,2011,7(3):444—448.(In Chinese)
[13]丁鹏飞.倾斜岩层中轨道交通区间隧道开挖稳定性分析[J].地下工程与隧道,2015,1:8—11.DING P F. Analysis on excavation stability of rail transit interval tunnel in tilted stratum[J].Underground Engineering and Tunnels,2015,1:8—11.(In Chinese)
[14]谢晔,刘军,李仲奎,等.在大型地下开挖中围岩块体稳定性分析[J].岩石力学与工程学报,2006,25(2):306—311.XIE Y,LIU J,LI Z K,et al.Stability analysis of block in surrounding rock mass of large underground excavation[J]. Chinese Journal of Rock Mechanics and Engineering,2006,25(2):306—311.(In Chinese)
[15]杨文军,洪宝宁,孙少锐,等.基于块体理论进行隧道轴线走向优化的研究[J].公路交通科技,2010,27(7):88—90.YANG W J,HONG B N,SUN S R,et al.Research on optimization for axis strike of rock tunnel based on block theory[J]. Journal of Highway and Transportation Research and Development,2010,27(7):88—90.(In Chinese)
[2]王思敬,杨志法,刘竹华.地下工程岩体稳定分析[M].北京:科学出版社,1984.WANG S J,YANG Z F,LIU Z H.Stability analysis of underground engineering rock mass[M]. Beijing:Science Press,1984.(In Chinese)
[3]孙广忠.岩体结构力学[M].北京:科学出版社,1988.SUN G Z,Rock mass structural machine[M]. Beijing:Science Press,1988.(In Chinese)
[4]石根华.岩体稳定分析的赤平投影方法[J].中国科学,1977,3:260-271.SHI G H.Stereographic projection method for rock mass stability analysis[J]. Science China,1977,3:260—271.(In Chinese)
[5] SHI G H,GOODMAN R E.A new concept for support of underground and surface excavation in discontinuous rocks based on a keystone principle[C]//Proc. 22th US Symposium on Rock Mechanics,1981:310—316.
[6] SHI G H.A geometric method for stability analysis of discontinuous rocks[J].Scientia Sinica,1982,25(3):318—336.
[7] GOODMAN R E,SHI G H.Willam B.Calculation of support for hard jointed rock using the keyblock principle[C]//Proc. 23th U.S.S Symposium on Rock Mechanics,(Berkeley,California),1982:883—898.
[8]刘伟韬,申建军,何寿迎.黄岛液化石油气地下储库主洞室岩体稳定性分析[J].中国地质灾害与防治学报,2014,25(2):65-69.LIU W T,SHEN J J,HE S Y.The block stability analysis of main cavern of Huangdao liquefied petroleum gas storage[J].The Chinese Journal of Geological Hazard and Control,2014,25(2):65—69.(In Chinese)
[9]邵冠慧,李晓昭,赵晓豹,等.基于块体理论安全系数的隧道优化设计[J].工程地质学报,2010,18(4):581-585.SHAO G H,LI X Z,ZHAO X B,et al.Tunnel design optimization based on safety factor of key block theory[J].Journal of Engineering Geology,2010,18(4):581—585.(In Chinese)
[10]陈庆发,周永亮,安佳丽.复杂裂隙岩体环境下巷道轴线走向优化研究[J].岩石力学与工程学报,2014,33(增1):2735-2442.CHEN Q F,ZHOU Y L,AN J L.Study of optimization for axis strike of roadway under environment of complex fractured rock mass[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(Supplement 1):2735—2442.(In Chinese)
[11]郝杰,侍克斌.基于块体和松动压力理论的隧洞围岩稳定性分析[J].地下空间与工程学报,2015,11(3):626-631.HAO J,SHI K B.Analysis on stability of the surrounding rock in tunnel based on block and loose pressure theory[J]. Chinese Journal of Underground Space and Engineering,2015,11(3):626—631.(In Chinese)
[12]董家兴,徐光黎,申艳军,等.基于块体理论的岩壁吊车梁岩台稳定性分析[J].地下空间与工程学报,2011,7(3):444-448.DONG J X,XU G L,SHEN Y J,et al.Analysis of stability for cliff crane beam based on key block theory[J].Chinese Journal of Underground Space and Engineering,2011,7(3):444—448.(In Chinese)
[13]丁鹏飞.倾斜岩层中轨道交通区间隧道开挖稳定性分析[J].地下工程与隧道,2015,1:8—11.DING P F. Analysis on excavation stability of rail transit interval tunnel in tilted stratum[J].Underground Engineering and Tunnels,2015,1:8—11.(In Chinese)
[14]谢晔,刘军,李仲奎,等.在大型地下开挖中围岩块体稳定性分析[J].岩石力学与工程学报,2006,25(2):306—311.XIE Y,LIU J,LI Z K,et al.Stability analysis of block in surrounding rock mass of large underground excavation[J]. Chinese Journal of Rock Mechanics and Engineering,2006,25(2):306—311.(In Chinese)
[15]杨文军,洪宝宁,孙少锐,等.基于块体理论进行隧道轴线走向优化的研究[J].公路交通科技,2010,27(7):88—90.YANG W J,HONG B N,SUN S R,et al.Research on optimization for axis strike of rock tunnel based on block theory[J]. Journal of Highway and Transportation Research and Development,2010,27(7):88—90.(In Chinese)
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