节理粗糙度及吻合状态对岩体动态压缩特性影响的试验研究

doi:10.13722/j.cnki.jrme.2020.0820

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (4413 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要节理粗糙度及吻合状态不仅直接影响节理力学性质，也对岩体的动态压缩性质有重要影响。首先采用水泥砂浆材料浇制不同粗糙度的完全吻合和不吻合节理岩体试样，然后使用分离式霍普金森杆系统对所制试样进行冲击试验研究节理岩体的动态压缩性质，同时利用高速摄像机及数字图像相关方法进行观测和计算去探究节理岩体动态破坏过程。结果表明：(1) 给定冲击荷载下，节理面粗糙度对完全吻合型节理试样的动态压缩强度和平均模量影响不大，但对不吻合型节理试样影响较大；(2) 不吻合型节理表现出非线性动态压缩闭合特点，其闭合特性不仅受到节理面粗糙度的影响，而且与节理的具体形貌特征相关；(3) 应力波在通过完全吻合型节理岩体的能力时受到节理面粗糙程度的影响不大，而不吻合节理岩体试样则表现出随着JRC增大而增大的趋势；(4) 节理岩体破坏与节理面的不规则凸起有关，节理壁凸起与应力波的相互作用引起节理面凸起处出现应力集中效应。拉应力引起张拉裂纹，而后裂纹扩展，直至贯通，岩体发生劈裂破坏坏。

	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
	闫亚涛1
	2
	李建春1
	2

关键词 ：岩石力学, 节理粗糙度, 节理吻合状态, 动态压缩闭合, 破坏过程, SHPB

Abstract：The surface roughness and matching state of joints have an important influence on the dynamic mechanical properties of rock masses. This paper used cement mortar materials to make fully-matched and mismatched jointed samples with different roughness，and carried out impact tests on the samples by using the split Hopkinson pressure bar system(SHPB). At the same time，a high-speed camera and the digital image correlation method were used to explore the dynamic failure process of rock masses. The results show that，under a given impact load，the jointed roughness has little effect on the dynamic compressive strength and the average modulus of the fully-matched jointed rock-like specimens but has a greater influence on the mismatched jointed rock-like specimens. Mismatched joints exhibit nonlinear closure characteristics under stress wave，which is not only affected by the joint roughness but also related to joint specific morphological characteristics. With increasing the joint roughness，the ability of the stress wave to through the mismatched jointed rock mass increases，while the fully-matched jointed rock mass showed little effect. The failure of jointed rock mass is related to the irregular bulge of the joint surface. Specifically，The interaction between the stress waves and the bulge on the joint walls leads to the stress concentration in the vicinity of the bulge. The dramatical tensile stress initiates cracks，then these cracks develop，and splitting failure occurred.

Key words： rock mechanics joint roughness matching state dynamic compressive closure failure process SHPB

引用本文:

闫亚涛1，2，李建春1，2. 节理粗糙度及吻合状态对岩体动态压缩特性影响的试验研究[J]. 岩石力学与工程学报, 2021, 40(6): 1132-1144.
YAN Yatao1，2，LI Jianchun1，2. Experimental study on the influence of joint roughness and matching state on dynamic compression characteristics of rock masses. , 2021, 40(6): 1132-1144.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0820 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I6/1132

[7]	SHEHATA W M. Geohydrology of mount vernon canyon area[Ph. D. Thesis][D]. Colorado：Colorado School of Mines，1971.
[13]	赵坚. 岩石节理吻合系数及其对节理特性的影响[J]. 岩石力学与工程学报，1997，16(6)：514-521.(ZHAO Jian. Joint matching coefficient and effects to behaviour of rock joint[J]. Chinese Journal of Rock Mechanics and Engineering，1997，16(6)：514-521.(in Chinese))
[1]	GOODMAN R E. Methods of geological engineering in discontinuous rocks[M]. [S. l.]：West Pub. Co，1976：1-472.
[3]	刘婷婷，李建春，李海波，等. 应力波通过非线性平行节理的能量分析[J]. 岩石力学与工程学报，2013，32(8)：1 610-1 617.(LIU Tingting，LI Jianchun，LI Haibo，et al. Energy analysis of stress wave propagation across parallel nonlinear joints[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(8)：1 610-1 617.(in Chinese))
[5]	LI J C，LI H B，JIAO Y Y，et al. Analysis for oblique wave propagation across filled joints based on thin-layer interface model[J]. Journal of Applied Geophysics，2014，102：39-46.
[6]	王兴渝，朱哲明，邱豪，等. 冲击荷载下层理对页岩内裂纹扩展行为影响规律的研究[J]. 岩石力学与工程学报，2019，38(8)：1 542-1 556.(WANG Xingyu，ZHU Zheming，QIU Hao，et al. Study of the effect of stratifications on crack propagation behaviors in shale under impacting loads[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(8)：1 542-1 556.(in Chinese))
[8]	BANDIS S C，LUMSDEN A C，BARTON N R.. Fundamentals of rock joint deformation[J]. International Journal of Rock Mechanics and Mining Science，1983，20(6)：249-268.
[11]	BARTON N R. A model study of rock-joint deformation[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1972，9(5)：579-582.
[15]	周峰，张鹏，王旭东. 吻合度对节理力学特性影响的细观数值试验[J]. 南京工业大学学报：自然科学版，2015，37(2)：85-90. (ZHOU Feng，ZHANG Peng，WANG Xudong. Influence of matching coefficient on joint mechanics characteristics based on meso- numerical analysis[J]. Journal of Nanjing Tech University：National Science，2015，37(2)：85-90.(in Chinese))
[16]	李淼，乔兰，周明，等. 节理粗糙度对应力波传播的影响研究[J]. 岩石力学与工程学报，2019，38(增1)：2 840-2 847.(LI Miao，QIAO Lan，ZHOU Ming，et al. Research of the joint roughness effects on stress wave propagation[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.1)：2 840-2 847.(in Chinese))
[18]	ZHAO J，CAI J G，ZHAO X B，et al. Dynamic model of fracture normal behaviour and application to prediction of Stress Wave attenuation across fractures[J]. Rock Mechanics and Rock Engineering，2008，41(5)：671-693.(in Chinese))
[21]	LI J C，MA G W. Experimental study of stress wave propagation across a filled rock joint[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(3)：471-478.
[23]	SHU P Y，LI H H，WANG T T，et al. Dynamic strength of rock with single planar joint under various loading rates at various angles of loads applied[J]. Journal of Rock Mechanics and Geotechnical Engineering，2018，10(3)：545-554.
[2]	XIE H P，ZHU J，ZHOU T，et al. Conceptualization and preliminary study of engineering disturbed rock dynamics[J]. Geomechanics and Geophysics for Geo-Energy and Geo-Resources，2020，6(2)：1-14.
[4]	FAN L F，YI X W，MA G W. Numerical manifold method(NMM) simulation of stress wave propagation through Fractured rock mass[J]. International Journal of Applied Mechanics，2013，5(2)：1350022.
[9]	BARTON N R，BANDIS S C，BAKTAR K. Strength，deformation and conductivity coupling of rock joints[J]. International Journal of Rock Mechanics and Mining Science，1985，22(3)：121-140.
[10]	SWAN G. Determination of stiffness and other joint properties from roughness measurements[J]. Rock Mechanics and Rock Engineering，1983，16(1)：19-38.
[12]	MARACHE A，RISS J，GEBTIER S. Experimental and modelled mechanical behaviour of a rock fracture under normal stress[J]. Rock Mechanics and Rock Engineering，2008，41(6)：869-892.
[14]	陈昕，李建春，任奋华，等. JMC对应力波透射系数和节理比刚度影响的实验研究[J]. 岩石力学与工程学报，2016，35(5)：957-963.(CHEN Xin，LI Jianchun，REN Fenhua，et al. Experimental research of JMC effect on stress wave propagation and joint specific stiffness[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(5)：957-963.(in Chinese))
[17]	杨建明，乔兰，李庆文，等. 节理形态及吻合度对应力波传播影响试验[J]. 哈尔滨工业大学学报，2019，51(11)：194-200.(YANG Jianming，QIAO Lan，LI Qingwen，et al. Effects of joint roughness and joint matching degree coefficient on stress wave propagation[J]. Journal of Harbin Institute of Technology，2019，51(11)：194-200.(in Chinese))
[19]	WANG W H，LI X B，ZHANG Y P，et al. Closure behavior of rock joint under dynamic loading[J]. Journal of Central South University of Technology，2007，14(3)：408-412.
[20]	刘婷婷，李建春，李海波，等. 接触面积对波传播规律及节理力学特性影响[J]. 岩石力学与工程学报，2014，33(9)：1 749-1 755.(LIU Tingting，LI Jianchun，LI Haibo，et al. Effects of contact area on stress wave propagation and joint mechanical properties[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)：1 749-1 755.(in Chinese))
[22]	马芹永，苏晴晴，马冬冬，等. 含不同节理倾角深部巷道砂岩SHPB动态力学破坏特性试验研究[J]. 岩石力学与工程学报，2020，39(6)：1 104-1 116.(MA Qinyong，SU Qingqing，MA Dongdong，et al. SHPB experimental study on dynamic characteristics and failure behaviors of sandstone containing weakly filled joints with various angles in deep roadways[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(6)：1 104-1 116.(in Chinese))
[24]	鞠杨，李业学，谢和平，等. 节理岩石的应力波动与能量耗散[J]. 岩石力学与工程学报，2006，25(12)：2 426-2 434.(JU Yang，LI Yexue，XIE Heping，et al. Stress wave propagation and energy dissipation in jointed rock[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(12)：2 426-2 434.(in Chinese))
[27]	GRASSELLI G，WIRTH J，EGGER P. Quantitative three-dimensional description of a rough surface and parameter evolution with shearing[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(6)：789-800.
[25]	LI J C，RONG L F，LI H B，et al. An SHPB test Study on stress wave energy attenuation in jointed rock masses[J]. Rock Mechanics and Rock Engineering，2019，52(2)：109-116.
[28]	DAI F，HUANG S，XIA K，et al. Some fundamental issues in dynamic compression and tension tests of rocks using split Hopkinson pressure bar[J]. Rock Mechanics and Rock Engineering，2010，43：657-666.
[30]	谢和平，周宏伟. 基于分形理论的岩石节理力学行为研究[J]. 中国科学基金，1998，(4)：17-22.(XIE Heping，ZHOU Hongwei. Research on mechanical behaviors of rock joints based on fractal theory[J]. Bulletin of National Science Foundation of China，1998，(4)：17-22.(in Chinese))
[26]	YANG Z Y，LO S C，DI C C. Reassessing the joint roughness coefficient (JRC) estimation using Z2[J]. Rock Mechanics and Rock Engineering，2001，34(3)：243-251.
[29]	ZHANG Q B，ZHAO J. A review of dynamic experimental techniques and Mechanical behaviour of rock materials[J]. Rock Mechanics and Rock Engineering，2014，47(4)：1 411-1 478.