Model test on propagation of blasting stress wave in jointed rock mass under different in-situ stresses
LI Xinping1，2，DONG Qian1，2，LIU Tingting1，2，LUO Yi1，2，ZHAO Hang1，2，HUANG Junhong1，2
(1. Hubei Key Laboratory of Road-bridge and Structure Engineering，Wuhan University of Technology，Wuhan，Hubei 430070，China；2. School of Civil Engineering and Architecture，Wuhan University of Technology，Wuhan，Hubei 430070，China)
Abstract：The propagation of stress wave in jointed rock under different in-situ stresses was studied through model test considering the influence of the joint number. An equation of wave propagation across multiple joints under in-situ stresses was established. The blasting stress wave was generated by the detonating cord，and the stress was monitored at different positions. The composition of wave attenuation induced by the jointed rock was studied under in-situ stresses，and the influence of confining pressure and joint number on the wave attenuation was analyzed. Considering the influence of in-situ stresses on nonlinear joint model，the equation of stress wave in multiple nonlinear deformation joints under in-situ stress was derived based on the method of time domain recursive analysis. The results show that the wave attenuation in the jointed rock is induced by the combined effect of the rock material and the joints. With the increasing of the in-situ stresses，the attenuation of explosive wave in the jointed rock is enhanced，in which the wave attenuation induced by rock material is strengthened and the attenuation caused by joints is reduced.
李新平1，2，董 千1，2，刘婷婷1，2，罗 忆1，2，赵 航1，2，黄俊红1，2. 不同地应力下爆炸应力波在节理岩体中传播规律模型试验研究[J]. 岩石力学与工程学报, 2016, 35(11): 2188-2196.
LI Xinping1，2，DONG Qian1，2，LIU Tingting1，2，LUO Yi1，2，ZHAO Hang1，2，HUANG Junhong1，2. Model test on propagation of blasting stress wave in jointed rock mass under different in-situ stresses. , 2016, 35(11): 2188-2196.
[1] PERINO A，ZHU J B，LI J C，et al. Theoretical methods for wave propagation across jointed rock masses[J]. Rock Mechanics and Rock Engineering，2010，43(6)：799–809.
[2] SCHOENBERG M. Elastic wave behavior across linear slip interfaces[J]. Journal of the Acoustical Society of America，1980，68(5)：1 516–1 521.
[3] CAJ J G，ZHAO J. Effects of multiple parallel fractures on apparent attenuation of stress waves in rock masses[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(4)：661–682.
[4] AKI K，RICHARDS P G. Quantitative seismology[M]. 2nd ed. [S.l.]：[s.n.]，1980：5–43.
[5] LI J C，MA G W，ZHAO J. An equivalent viscoelastic model for rock mass with parallel joints[J]. Journal of Geophysical Research：Solid Earth，2010，115(B3)：1 923–1 941.
[6] LI J C. Wave propagation across non-linear rock joints based on time-domain recursive method[J]. Geophysical Journal International，2013，193(2)：970–985.
[7] BANDIS S C，LUMSDEN A C，BARTON N R. Fundamentals of rock joint deformation[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1983，20(6)：249–268.
[8] 王四巍，刘汉东，姜 彤. 动静荷载联合作用下冲击地压巷道破坏机制大型地质力学模型试验研究[J]. 岩石力学与工程学报，2014，33(10)：2 095–2 100.(WANG Siwei，LIU Handong，JIANG Tong. Large geomechanical model test on failure mechanism of rockburst tunnel under static and explosive loads[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(10)：2 095–2 100.(in Chinese))
[9] 李夕兵，周子龙，叶州元，等. 岩石动静组合加载力学特性研究[J]. 岩石力学与工程学报，2008，27(7)：1 387–1 395.(LI Xibing，ZHOU Zilong，YE Zhouyuan，et al. Study of rock mechanical characteristics under coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(7)：1 387– 1 395.(in Chinese))
[10] 李夕兵，宫凤强，赵 坚，等. 一维动静组合加载下岩石冲击破坏试验研究[J]. 岩石力学与工程学报，2010，29(2)：251–260.(LI Xibing，GONG Fengqiang，ZHAO Jian，et al. Test study of impact failure of rock subjected to one dimensional coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：251–260.(in Chinese))
[11] 李新平，赵 航，罗 忆，等. 深部裂隙岩体中弹性波传播与衰减规律试验研究[J]. 岩石力学与工程学报，2015，34(11)：2 319– 2 326.(LI Xinping，ZHAO Hang，LUO Yi，et al. Experimental study of propagation and attenuation of elastic wave in deep rock mass with joints[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(11)：2 319–2 326.(in Chinese))
[12] 范 新，王明洋，施存程. 初始应力对应力波传播及块体运动规律影响研究[J]. 岩石力学与工程学报，2009，28(增2)：3 442–3 446. (FAN Xin，WANG Mingyang，SHI Cuncheng. Study on effects of initial stress on stress wave propagation and block movement law[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.2)：3 442–3 446.(in Chinese))
[13] FAN L F，SUN H Y. Seismic wave propagation through an in-situ stressed rock mass[J]. Journal of Applied Geophysics，2015，121(1)：13–20.
[14] 陈安敏，顾金才，沈 俊，等. 岩土工程多功能模拟试验装置的研制及应用[J]. 岩石力学与工程学报，2004，23(2)：372–378. (CHEN Anmin，GU Jincai，SHEN Jun，et al. Development and application of multifunctional apparatus for geotechnical engineering model tests[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(2)：372–378.(in Chinese))
[15] 张春生，陈祥荣，侯 靖，等. 锦屏二级水电站深埋大理岩力学特性研究[J]. 岩石力学与工程学报，2010，29(10)：1 999–2 009. (ZHANG Chunsheng，CHEN Xiangrong，HOU Jing，et al. Study of mechanical behavior of deep-buried marble at Jinping II hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(10)：1 999–2 009.(in Chinese))
[16] 石安池，唐鸣发，周其健. 金沙江白鹤滩水电站柱状节理玄武岩岩体变形特性研究[J]. 岩石力学与工程学报，2008，27(10)：2 079– 2 086.(SHI Anchi，TANG Mingfa，ZHOU Qijian. Research of deformation characteristics of columnar jointed basalt at baihetan hydropower station on Jinsha river[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(10)：2 079–2 086.(in Chinese))
[17] LI J C，LI H B，MA G W，et al. A time-domain recursive method to analyses transient wave propagation across rock joints[J]. Geophysical Journal International，2012，188(2)：631–644.
[18] LI J C，MA G W，HUANG X. Analysis of wave propagation through a filled rock joint[J]. Rock Mechanics and Rock Engineering，2010，43(6)：789–798.
2016, Vol. 35 
