|
|
|
| EXPERIMENTAL STUDY AND DETECTION ANALYSIS OF MECHANICAL PROPERTIES VARIABILITY OF ROCK MASS IN EXCAVATION DISTURBANCE |
| JI Hongguang1，2，XIANG Peng1，ZHANG Lei1，2，HAN Fang3，YANG Zhanjun3 |
| (1. School of Civil and Environment Engineering，University of Science and Technology Beijing，Beijing 100083，China；2. Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines，University of Science and Technology Beijing，Beijing 100083，China；3. Fushun Mining Group Limited Company，Fushun，Liaoning 113008，China) |
|
|
|
|
Abstract The change of resistivity of rock during its damage process is studied by uniaxial cyclic loading and unloading test. The variation rules of rock resistivity，elastic modulus and compression strength in the damage process is found out that it accords logarithmic mathematical model. So the rock damage variable can be expressed in resistivity change. The results of marble triaxial compression test show that the relationship between rock elastic modulus and shear strength accords logarithmic mathematical model；and the difference of the whole variation law is not obvious. According to the research results mentioned above，the empirical equation regarding resistivity，elastic modulus，compression strength and shear strength is established；and the variability of mechanical properties of rock mass can be expressed with resistivity change. At last，the mechanical parameters of disturbed rock mass are estimated according to apparent resistivity change of Donglutian open pit layer in Fushun got by in-situ detection，which provide basic evidence of selecting mechanical parameters for further analysis of the slope stability.
|
|
Received: 21 March 2011
|
|
|
|
| [1] 杨 泽，侯克鹏，李克刚，等. 云锡大屯锡矿岩体力学参数的确定[J]. 岩土力学，2010，31(6)：1 923–1 928.(YANG Ze，HOU Kepeng，LI Kegang，et al. Determination of mechanical parameters of rock mass from Yunxi Datun Tin Mine[J]. Rock and Soil Mechanics，2010，31(6)：1 923–1 928.(in Chinese))
[2] 江 权，冯夏庭，陈国庆. 考虑高地应力下围岩劣化的硬岩本构模型研究[J]. 岩石力学与工程学报，2008，27(1)：144–152.(JIANG Quan，FENG Xiating，CHEN Guoqing. Study on constitutive model of hard rock considering surrounding rock deterioration under high geostresses[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(1)：144–152.(in Chinese))
[3] 易顺民，朱珍德. 裂隙岩体损伤力学导论[M]. 北京：科学出版社，2005：1–70.(YI Shunmin，ZHU Zhende. Damage theory introduction of fractured rock mass[M]. Beijing：Science Press，2005：1–70.(in Chinese))
[4] 赵明阶. 裂隙岩体在受荷条件下的声学特性研究[博士学位论文][D]. 重庆：重庆建筑大学，1998.(ZHAO Mingjie. A study on ultrasonic properties of cracked rock mass under loading and unloading[Ph. D. Thesis][D]. Chongqing：Chongqing Jianzhu University，1998.(in Chinese))
[5] 王 唢，赵明阶，蒋树屏. 隧道开挖中围岩损伤演化分析及力学参数预测[J]. 岩土力学，2009，30(8)：195–200.(WANG Suo，ZHAO Mingjie，JIANG Shuping. Analysis of tunnel rock damage evolution process in excavation and predicting mechanical parameters[J]. Rock and Soil Mechanics，2009，30(8)：195–200.(in Chinese))
[6] 郝锦绮，冯 锐，周建国，等. 岩石破裂过程中电阻率变化机制的探讨[J]. 地球物理学报，2002，45(3)：426–434.(HAO Jinqi，FENG Rui，ZHOU Jianguo，et al. Study on the mechanism of resistivity changes during rock cracking[J]. Chinese Journal of Geophysics，2002，45(3)：426–434.(in Chinese))
[7] 陈耕野，田 军，姚广仁. 岩石应力的电学效应及其断裂演化规律[J]. 岩石力学与工程学报，2005，24(11)：1 832–1 840.(CHEN Gengye，TIAN Jun，YAO Guangren. Electrical effect of rock stress and its fracture evolution laws[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(11)：1 832–1 840.(in Chinese))
[8] 张 磊. 基于电阻率探测的采动岩体力学变异性研究及应用[硕士学位论文][D]. 北京：北京科技大学，2009.(ZHANG Lei. Study on the variability of mechanical parameters of mining rock by resistivity detection method[M. S. Thesis][D]. Beijing：University of Science and Technology Beijing，2009.(in Chinese))
[9] LEMAITRE J，CHABOCHE J L. Aspect phénoménologique de la rupture par endommagement[J]. Journal de Mécanique Appliquée，1978，2：317–365.(in French)
[10] 巩 丽. 地下开采扰动区域露天边坡稳定性分析与失稳模式研究[硕士学位论文][D]. 北京：北京科技大学，2009.(GONG Li. Study on stability analysis and instability mode of the open-pit slope with underground mining disturbance[M. S. Thesis][D]. Beijing：University of Science and Technology Beijing，2009.(in Chinese)) |
|
|
|
2011, Vol. 30 
