基于应力波频谱变化测试岩体节理的刚度

doi:10.13722/j.cnki.jrme.2015.0120

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (298 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要用线性变形节理描述宏观节理的变形特性，在节理的法线方向布置一条测线，测线上在节理两侧分别布置一个测点，用以记录入射侧和透射侧的波形，结合应力波垂直通过单一线性变形节理的透射系数和反射系数，利用透射侧波形的频谱，可以得到入射侧测点处波形的计算频谱，令入射侧波形的频谱与计算频谱相等，提出应力波垂直入射时基于频谱测试节理刚度的方法。通过FLAC3D模拟，验证刚度测试方法的合理性，并分析入射波的峰值频率、节理刚度和节理两侧岩石的弹性模量对测试误差的影响，结果发现，节理刚度越大，测试误差越小；弹性模量越大，测试误差越大；峰值频率对测试结果影响较小；不同工况下，均具有较高的计算精度。在德兴铜矿露天开采临时边坡面上选择一个两侧岩体相对完整、所在坡面比较平整的宏观节理，进行了9次试验，9次试验的测试结果相近，9次试验的法向刚度测试值的方差为0.72，切向刚度测试值的方差为0.56，说明节理刚度测试方法具有稳定性高的特点。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：岩石力学, 动力测试, 应力波, 线性变形节理, 节理刚度

Abstract：The linear deforming joint was adopted to describe the deformation behaviour of the joint. Two measuring points were arranged in the line normal to the joint and were at two sides of the joint. The waveforms from the incident side and transmitted side were measured respectively. The spectrum of waveform at the measuring point of the incident side was calculated using the spectrum of waveform at transmitted side and the transmission and reflection coefficients of the normally stress wave propagating across the linear deforming joint. The method for measuring the joint stiffness was deduced assuming the spectrum of waveform of incident side equal to the calculated one. The rationality of the stiffness measurement was verified through the numerical simulation with FLAC3D. The joint stiffness and elastic modulus of rock were shown to affect the precision of the measurement. The greater the joint stiffness，the smaller the measuring error. The larger the rock elastic modulus，the bigger the test error. The peak frequency had little effect on the testing results. Experiments were carried out to a typical joint in a slope at Dexing Copper Mine. 9 tests were performed totally. The test results were all similar with the variance of normal stiffness of 0.72 and the variance of shear stiffness of 0.56.

Key words： rock mechanics dynamic test stress wave linear deforming joint stiffness of joint

引用本文:

龙平1，王观石1，2，胡世丽1，罗嗣海1. 基于应力波频谱变化测试岩体节理的刚度[J]. 岩石力学与工程学报, 2015, 34(08): 1677-1683.
LONG Ping1，WANG Guanshi1，2，HU Shili1，LUO Sihai1. MEASURING STIFFNESS OF JOINTED ROCK BASED ON SPECTRUM VARIATION OF STRESS WAVE. , 2015, 34(08): 1677-1683.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.0120 或 http://www.rockmech.org/CN/Y2015/V34/I08/1677

[3]	BEST A I，MCCANN C，SOTHCOTT J. The relationships between the velocities，attenuations and petrophysical properties of reservoir sedimentary rocks[J]. Geophysical Prospecting，1994，42(2)：151-178. " target="_blank">
[4]	HANSEN S，THURBER C，MANDERNACH M，et al. Seismic velocity and attenuation structure of the east rift zone and south flank of Kilauea Volcano，Hawaii[J]. Bulletin of the Seismological Society of America，2004，94(4)：1 430-1 440. " target="_blank">
[6]	PYRAK-NOLTE L J. The seismic response of fractures and the interrelations among fracture properties[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1996，33(8)：787-802. " target="_blank">
[7]	KING M S，MYER L R，REZOWALLI J J. Experimental studies of elastic-wave propagation in a columnar-jointed rock mass[J]. Geophysical Prospecting，1986，34(8)：1 185-1 199. " target="_blank">
[12]	赵坚，蔡军刚，赵晓豹，等. 弹性纵波在具有非线性法向变形本构关系的节理处的传播特征[J]. 岩石力学与工程学报，2003，22(1)：9-17.(ZHAO Jian，CAI Jungang，ZHAO Xiaobao，et al. Transmission of elastic P-wave across single fracture with nonlinear normal deformation behavior[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(1)：9-17.(in Chinese))
[13]	LI J C，MA G W. Analysis of blast wave interaction with a rock joint[J]. Rock Mechanics and Rock Engineering，2010，43(6)：777-787.
[14]	俞缙，宋博学，钱七虎. 节理岩体双重非线性弹性介质中的纵波传播特性[J]. 岩石力学与工程学报，2011，30(12)：2 463-2 473. (YU Jin，SONG Boxue，QIAN Qihu. Propagation of P-waves in dual nonlinear elastic medium for jointed rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(12)：2 463-2 473.(in Chinese)) " target="_blank">
[17]	NEWMAN P. Divergence effects in a layered earth[J]. Geophysics，1973，38(3)：481-488. " target="_blank">
[18]	王卫华，李夕兵，左宇军. 非线性法向变形节理对弹性纵波传播的影响[J]. 岩石力学与工程学报，2006，25(6)：1 218-1 225.(WANG Weihua，LI Xibing，ZUO Yujun. Effects of single joint with nonlinear normal deformation on P-wave propagation[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(6)：1 218-1 225.(in Chinese)) " target="_blank">
[11]	PYRAK-NOLTE L J. Seismic visibility of fractures[Ph. D. Thesis][D]. Berkeley：Department of Materials Science and Mineral Engineering，University of California，1988. " target="_blank">
[16]	柴少波，李建春，李海波. 柱面波在节理岩体中的传播特性[J]. 岩石力学与工程学报，2014，33(3)：523-530.(CHAI Shaobo，LI Jianchun，LI Haibo. Propagation characteristics of cylindrical wave in joint rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(3)：523-530.(in Chinese))
[1]	SHAPIRO A A，BEDRIKOVETSKY P G. A stochastic theory for deep bed filtration accounting for dispersion and size distributions[J]. Physica A：Statistical Mechanics and its Applications，2010，389(13)：2 473-2 494. " target="_blank">
[2]	ADELINET M，FORTINF J，GUÉGUEN Y. Dispersion of elastic moduli in a porous-cracked rock：theoretical predictions for squirt-flow[J]. Tectonophysics，2011，503(1)：173-181. " target="_blank">
[5]	陈文超，高静怀. 基于改进的最佳匹配地震子波的地震资料衰减特性分析[J]. 地球物理学报，2007，50(3)：837-843.(CHEN Wenchao，GAO Jinghuai. Characteristic analysis of seismic attenuation using
[8]	JONES J P，WHITTIER J S. Waves at a flexibly bonded interface[J]. Journal of Applied Mechanics，1967，34(4)：905-909. " target="_blank">
[9]	PYRAK-NOLTE L J，MYER L R，COOK N G W. Transmission of seismic waves across single natural fractures[J]. Journal of Geophysical Research，1990，95(B6)：8 617-8 638. " target="_blank">
[10]	SCHOENBERG M. Elastic wave behavior across linear slip interfaces[J]. Journal of the Acoustical Society of America，1980，68(5)：1 516-1 521. " target="_blank">
[15]	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.
[19]	陈育民，徐鼎平. FLAC/FLAC3D基础与工程实例[M]. 北京：中国水利水电出版社，2008：198-199.(CHEN Yumin，XU Dingping. Fundamentals of FLAC and FLAC3D and case study[M]. Beijing：China Water Power Press，2008：198-199.(in Chinese)) " target="_blank">
[20]	宋林. 节理岩体中应力波传播的动力特性研究[博士学位论文][D]. 西安：西安建筑科技大学，2012.(SONG Lin. Research into the dynamic characteristics of stress wave propagation in jointed rock[Ph. D. Thesis][D]. Xi?an：Xi?an University of Architecture and Technology，2012.(in Chinese)) " target="_blank">
	MBMSW wavelets[J]. Chinese Journal of Geophysics，2007，50(3)：837-843.(in Chinese)) " target="_blank">