地壳岩石压剪断裂核形态探讨
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摘要
给出了当KⅠ<0时KⅠ,KⅡ,KⅢ地壳岩石压剪断裂核的形状方程;分析了KⅠ,KⅡ叶状压剪断裂核和KⅠ,KⅢ花蕾状压扭断裂核的形状与性状并介绍了岩石压扭直剪断裂试验和大理岩试件的破坏状况。在压剪断裂试件临破坏前切口区域的微观照片中可见岩石破碎情况,与理论分析相符。探讨了地壳岩石压剪断裂核的延深长度,并借矿床地质调查的成果加以实证。
The shape equation of KⅠ,KⅡ,KⅢ for rock compression and shear fracture nucleus of the earth′s crust, when the coefficient KⅠ is less than 0,is given. The shape and character of KⅠ,KⅡ for compression and shear fracture nucleus with the shape of leaf,and KⅠ,KⅢ for compression and torsion fracture nucleus with the shape of bud are analyzed. Compression and torsion of direct shear fracture test and rupture state of marble samples are introduced. The rock rupture state can be seen in the microcosmic photo of the notched area of compression and shear fracture samples before failure. The results agree well with the theoretic analytic results. The extension length of rock compression and shear fracture nucleus of the earth's crust is discussed,and it is verified by in-situ findings of geological investigation.
The shape equation of KⅠ,KⅡ,KⅢ for rock compression and shear fracture nucleus of the earth′s crust, when the coefficient KⅠ is less than 0,is given. The shape and character of KⅠ,KⅡ for compression and shear fracture nucleus with the shape of leaf,and KⅠ,KⅢ for compression and torsion fracture nucleus with the shape of bud are analyzed. Compression and torsion of direct shear fracture test and rupture state of marble samples are introduced. The rock rupture state can be seen in the microcosmic photo of the notched area of compression and shear fracture samples before failure. The results agree well with the theoretic analytic results. The extension length of rock compression and shear fracture nucleus of the earth's crust is discussed,and it is verified by in-situ findings of geological investigation.
引文
[1]周群力.地壳岩石压剪断裂端倪[J].三峡大学学报,2002,24(1):45–47.(Zhou Qunli. Rock compression shear fracture inference of the earth′s crust[J]. Journal of China Three Gorges University,2002,24(1):45–47.(in Chinese))
[2]刘振洪,龙湘桂,周翠云.大理岩真三轴强度判据与破坏后的扩容[A].见:涂传林编.第五届岩石、混凝土断裂和强度学术会议论文集[C].北京:国防科技大学出版社,1993.195–199.(Liu Zhenhong,Long Xianggui,Zhou Cuiyun. Real triaxial strength criteria and dilatancy after failure for marble[A]. In:Tu Chuanlin,ed. The Fifth Symposium on Fracture and Strength of Rock and Concrete[C]. Beijing:National University of Defense and Technology Press,1993.195–199.(in Chinese))
[3] Irwin G R. Analysis of stresses and strains near the end of a crack transversing a plate[J]. Journal of Applied Mechanics,1957,24:361–364.
[4]周翠云,李大庆,佘泳琼.岩石闭合裂缝在压剪断裂过程中的开位[A].见:朱维申编,中国青年学者岩土工程力学及其应用讨论会论文集[C].北京:科学出版社,1994.231–234.(Zhou Cuiyun,Li Daqing,She Yongqiong. Open displacement of closed rock cracks in the process of compression and shear fracture[A]. In:Zhu Weishen,ed. Chinese Youth Scholar′s Symposium on Rock and Soil Engineering Mechanics and Application[C]. Beijing:Science Press,1994.231–234.(in Chinese))
[5]周群力,刘振洪,王良之.岩石压剪断裂核的扩容效应[J].岩石力学与工程学报,1999,18(4):444–446.(Zhou Qunli,Liu Zhenhong,Wang Liangzhi. Dilatancy effect of rock compression shear fracture nucleus[J]. Chinese Journal of Rock Mechanics and Engineering,1999,18(4):444–446.(in Chinese))
[6] Zhou Qunli,Gong Shaoping,Chen Zhongjian. Compression shear fracture mechanism for marble[A]. InJ:CFCR[C].[s. l.][:s. n.],1987.17–19.
[7]周群力,佘泳琼,王良之.岩石压剪裂核的试验研究[J].固体力学学报,1991,12(4):329–336.(Zhou Qunli,She Yongqiong,Wang Liangzhi. Experimental study on the compression shear fracture nucleus of rock[J]. Acta Mechanica Solida Sinica,1991,12(4):329–336.(in Chinese))
[8]周群力.从断裂力学的观点对新丰江水库地震机理的探讨[J].地震研究,1979,(3):28–38.(Zhou Qunli. A study on mechanism of Xinfengjiang reservoir impounding earthquake from fracture dynamical point of view[J]. Journal of Seismological Research,1979,(3):28–38.(in Chinese))
[9] Bullen K E.地震学引论[M].朱传镇,李钦祖译.北京:科学出版社,1965.(Bullen K E. An Introduction to Seismology[M]. Translated by Zhu Chuanzhen,Li Qinzu. Beijing:Science Press,1965.(in Chinese))
[10]陈毓川,朱裕生.中国矿床成矿模式[M].北京:地质出版社,1993.34–39,92–96.(Chen Yuchuan,Zhu Yusheng. Mineral Deposit Models of China[M]. Beijing:Geological Publishing House,1993.34–39,92–96.(in Chinese))
[2]刘振洪,龙湘桂,周翠云.大理岩真三轴强度判据与破坏后的扩容[A].见:涂传林编.第五届岩石、混凝土断裂和强度学术会议论文集[C].北京:国防科技大学出版社,1993.195–199.(Liu Zhenhong,Long Xianggui,Zhou Cuiyun. Real triaxial strength criteria and dilatancy after failure for marble[A]. In:Tu Chuanlin,ed. The Fifth Symposium on Fracture and Strength of Rock and Concrete[C]. Beijing:National University of Defense and Technology Press,1993.195–199.(in Chinese))
[3] Irwin G R. Analysis of stresses and strains near the end of a crack transversing a plate[J]. Journal of Applied Mechanics,1957,24:361–364.
[4]周翠云,李大庆,佘泳琼.岩石闭合裂缝在压剪断裂过程中的开位[A].见:朱维申编,中国青年学者岩土工程力学及其应用讨论会论文集[C].北京:科学出版社,1994.231–234.(Zhou Cuiyun,Li Daqing,She Yongqiong. Open displacement of closed rock cracks in the process of compression and shear fracture[A]. In:Zhu Weishen,ed. Chinese Youth Scholar′s Symposium on Rock and Soil Engineering Mechanics and Application[C]. Beijing:Science Press,1994.231–234.(in Chinese))
[5]周群力,刘振洪,王良之.岩石压剪断裂核的扩容效应[J].岩石力学与工程学报,1999,18(4):444–446.(Zhou Qunli,Liu Zhenhong,Wang Liangzhi. Dilatancy effect of rock compression shear fracture nucleus[J]. Chinese Journal of Rock Mechanics and Engineering,1999,18(4):444–446.(in Chinese))
[6] Zhou Qunli,Gong Shaoping,Chen Zhongjian. Compression shear fracture mechanism for marble[A]. InJ:CFCR[C].[s. l.][:s. n.],1987.17–19.
[7]周群力,佘泳琼,王良之.岩石压剪裂核的试验研究[J].固体力学学报,1991,12(4):329–336.(Zhou Qunli,She Yongqiong,Wang Liangzhi. Experimental study on the compression shear fracture nucleus of rock[J]. Acta Mechanica Solida Sinica,1991,12(4):329–336.(in Chinese))
[8]周群力.从断裂力学的观点对新丰江水库地震机理的探讨[J].地震研究,1979,(3):28–38.(Zhou Qunli. A study on mechanism of Xinfengjiang reservoir impounding earthquake from fracture dynamical point of view[J]. Journal of Seismological Research,1979,(3):28–38.(in Chinese))
[9] Bullen K E.地震学引论[M].朱传镇,李钦祖译.北京:科学出版社,1965.(Bullen K E. An Introduction to Seismology[M]. Translated by Zhu Chuanzhen,Li Qinzu. Beijing:Science Press,1965.(in Chinese))
[10]陈毓川,朱裕生.中国矿床成矿模式[M].北京:地质出版社,1993.34–39,92–96.(Chen Yuchuan,Zhu Yusheng. Mineral Deposit Models of China[M]. Beijing:Geological Publishing House,1993.34–39,92–96.(in Chinese))
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