断续节理岩体声学力学特性试验研究

doi:10.13722/j.cnki.jrme.2020.0008

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摘要断续节理对岩体强度的影响及其评价方法一直是岩体力学领域研究的热点和难点。采用石膏制作含有不同节理倾角、密度及连通率组合的断续节理岩体试样，共计45组，每组试样先后开展超声波波速测试和单轴压缩试验，分析试样力学参数和声学参数间的关联特性，探索节理分布特征对岩体破坏模式及单轴抗压强度的影响，最终提出断续节理岩体单轴抗压强度的取值方法。结果表明，纵波波速与节理连通率呈正相关，随节理倾角增大近似“V”型先减后增；单轴抗压强度和弹性模量随节理连通率的增大而增大；单轴抗压强度随节理倾角的增大近似“U”型先减后增；总结提出了断续节理岩体的4种破坏模式，并认为节理与加载方向成45°夹角时最易破坏；最终提出了基于岩体及岩石纵波波速、岩石内摩擦角、节理倾角的岩体单轴抗压强度与岩石单轴抗压强度之间的拟合关系。

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	赵修成1
	赵晓彦1
	郭佳奇2

关键词 ：岩石力学, 断续节理岩体, 声波波速, 单轴抗压强度

Abstract：The influence of intermittent joints on the strength of rock masses and its evaluation method have always been one of the hotspots and difficulties in the field of rock mass mechanics. In this paper，45 samples of intermittent jointed rock mass are made from gypsum with different combinations of joint inclination，density connectivity，and ultrasonic wave speed and uniaxial compression strength(UCS) tests are performed. The correlation characteristics between the mechanical and acoustic parameters are investigated，the influence of the distribution characteristics of joints on the rock mass failure mode and UCS is explored and consequently a determination method of the UCS of intermittent jointed rock mass is proposed. The results show that the P-wave velocity is positively correlated with the joint connectivity and has an approximately V-shaped change with increasing the joint dip angle，and that both the UCS and the elastic modulus(E) of the jointed rock mass increase with increasing the joint connectivity and the UCS presents an approximately U-shaped change with increasing the joint dip angle. Four fracturing modes of intermittent jointed rock masses are proposed and it is pointed out that samples are most prone to fail when the joint forms a 45°angle with the loading direction. Finally，a fitting relationship between the UCS of jointed rock masses and intact rock block is proposed by considering not only the P-wave velocity but also the internal friction angle of the rock block and the joint dip angle.

Key words： rock mechanics intermittent jointed rock mass acoustic wave velocity uniaxial compression strength(UCS)

引用本文:

赵修成1，赵晓彦1，郭佳奇2. 断续节理岩体声学力学特性试验研究[J]. 岩石力学与工程学报, 2020, 39(7): 1408-1419.
ZHAO Xiucheng1，ZHAO Xiaoyan1，GUO Jiaqi2. Experimental study on acoustic and mechanical properties of intermittent jointed rock mass. , 2020, 39(7): 1408-1419.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0008 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/I7/1408

[8]	YANG S Q，YANG D S，JING H W，et al. An experimental study of the fracture coalescence behavior of brittle sandstone specimens containing three fissures[J]. Rock Mechanics and Rock Engineering，2012，45(4)：563-582.
[16]	ZHOU X P，ZHANG J Z，WONG L N Y. Experimental study on the growth，coalescence and wrapping behaviors of 3d cross-embedded flaws under uniaxial compression[J]. Rock Mechanics and Rock Engineering，2018，51(5)：1 379-1 400.
[18]	ZHOU X P，ZHANG J Z，QIAN Q，et al. Experimental investigation of progressive cracking processes in granite under uniaxial loading using digital imaging and AE techniques[J]. Journal of Structural Geology，2019，126：129-145.
[20]	周治国，朱合华，陈伟. 饱水岩样声波传播规律的试验研究[J]. 岩石力学与工程学报，2006，25(5)：911-917.(ZHOU Zhiguo，ZHU Hehua，CHEN Wei. Experimental study on acoustic wave propagation character of water saturated rock samples[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(5)：911-917.(in Chinese))
[7]	ZHANG L. Estimating the strength of jointed rock masses[J]. Rock Mechanics and Rock Engineering，2010，43(4)：391-402.
[17]	ZHANG J Z，ZHOU X P，ZHOU L S，et al. Progressive failure of brittle rocks with non-isometric flaws：Insights from acousto-optic- mechanical(AOM) data[J]. Fatigue and Fracture of Engineering Materials and Structures，2019，42(8)：1 787-1 802.
[3]	MUGHIEDA O S. Failure mechanisms and strength of non-persistent rock joints[D]. Urbana，Illinois，USA：University of Illinois，1997.
[5]	胡波. 基于精细结构描述及数值试验的断续节理岩体力学参数智能选取[J]. 岩石力学与工程学报，2010，29(10)：2 160.(HU Bo. Intelligent selection of mechanical of discontinuous jointed rock mass based on fine structure descriptions and numerical tests[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(10)：2 160.(in Chinese))
[15]	WONG L N Y，EINSTEIN H H. Crack Coalescence in Molded Gypsum and Carrara Marble：Part 1. Macroscopic Observations and Interpretation[J]. Rock Mechanics and Rock Engineering，2009，42(3)：475-511.
[1]	JAMIL S M. Strength of non-persistent rock joints[Ph. D. Thesis][D]. Urbana，Illinois，USA：University of Illinois，1992.
[25]	中华人民共和国行业标准编写组. TB 10115—2014铁路工程岩石试验规程(附条文说明)[S]. 北京：中国铁道出版社，2014.(The Professional Standards Compilation Group of People’s Republic of China. TB 10115—2014 Code for Rock Test of Railway Engineering[S]. Beijing：China Railway Publishing House，2014.(in Chinese))
[13]	WASANTHA P L P，RANJITH P G，VIETE D R，et al. Influence of the geometry of partially-spanning joints on the uniaxial compressive strength of rock[J]. International Journal of Rock Mechanics and Mining Sciences，2012，50：140-146.
[19]	赵明阶，吴德伦. 工程岩体的超声波分类及强度预测[J]. 岩石力学与工程学报，2000，19(1)：89-92.(ZHAO Mingjie，WU Delun. The ultrasonic identification of rock mass classification and rock mass strength prediction[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(1)：89-92.(in Chinese))
[23]	HUANG X L，QI S，GUO S，et al. Experimental study of ultrasonic waves propagating through a rock mass with a single joint and multiple parallel joints[J]. Rock Mechanics and Rock Engineering，2014，47(2)：549-559.
[2]	刘顺桂，刘海宁，王思敬，等. 断续节理直剪试验与PFC2D数值模拟分析[J]. 岩石力学与工程学报，2008，27(9)：1 828-1 836. (LIU Shungui，LIU Haining，WANG Sijing，et al. Direct shear tests and PFC2D numerical simulation of intermittent joints[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(9)：1 828-1 836.(in Chinese))
[21]	朱合华，周治国，邓涛. 饱水对致密岩石声学参数影响的试验研究[J]. 岩石力学与工程学报，2005，24(5)：823-828.(ZHU Hehua，ZHOU Zhiguo，DENG Tao. Acoustic parameters of low-porosity rock under dry and saturated conditions [J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(5)：823-828.(in Chinese))
[12]	YANG W D，LI G，RANJITH P G，et al. An experimental study of mechanical behavior of brittle rock-like specimens with multi-non-persistent joints under uniaxial compression and damage analysis[J]. International Journal of Damage Mechanics，2019，28(10)：1 490-1 522.
[22]	KURTULU? C，ÜÇKARDE? M，SARI U，et al. Experimental studies in wave propagation across a jointed rock mass[J]. Bulletin of Engineering Geology and the Environment，2012，71(2)：231-234.
[14]	WONG L N Y，EINSTEIN H H. Systematic evaluation of cracking behavior in specimens containing single flaws under uniaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(2)：239-249.
[24]	徐冲. 圆柱形类断续节理试样制备及单轴抗压强度[J]. 土木工程与管理学报，2019，36(2)：114-119.(XU Chong. Preparation technology and uniaxial compression strength of cylindrical rock-like specimens with non-persistent joints [J]. Journal of Civil Engineering and Management，2019，36(2)：114-119.(in Chinese))
[4]	李术才，朱维申. 复杂应力状态下断续节理岩体断裂损伤机制研究及其应用[J]. 岩石力学与工程学报，1999，18(2)：24-28.(LI Shucai，ZHU Weishen. Fracture damage mechanism of discontinuous jointed rock mass under the state of complex stress and its application[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(2)：24-28.(in Chinese))
[6]	张志刚，乔春生. 改进的节理岩体强度参数经验确定方法及工程应用[J]. 北京交通大学学报，2006，(4)：46-49.(ZHANG Zhigang，QIAO Chunsheng. Improved empirical determination of strength parameter for jointed rock masses and its application in engineering[J]. Journal of Beijing Jiaotong University，2006，(4)：46-49.(in Chinese))
[9]	CHEN X，LIAO Z，PENG X. Deformability characteristics of jointed rock masses under uniaxial compression[J]. International Journal of Mining Science and Technology，2012，22(2)：213-221.
[10]	LIU Y，DAI F，FAN P，et al. Experimental investigation of the influence of joint geometric configurations on the mechanical properties of intermittent jointed rock models under cyclic uniaxial compression[J]. Rock Mechanics and Rock Engineering，2017，50(6)：1 453-1 471.
[11]	CAO R，LIN H，CAO P. Strength and failure characteristics of brittle jointed rock-like specimens under uniaxial compression：Digital speckle technology and a particle mechanics approach[J]. International Journal of Mining Science and Technology，2018，28(4)：669-677.