单轴压缩条件下含双圆孔类岩石试样力学特性的细观研究

doi:10.13722/j.cnki.jrme.2017.0501

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (1461 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract As a kind of typical flaw，circular hole plays a significant role on the mechanical properties of rock. Specimens containing two circular holes were constructed and subjected to uniaxial compression based on lab experiment and two dimensional particle flow code(PFC2D). The effect of the distance between holes and the dip angle on the strength，fracture mode and crack development of rock were investigated in detail. With the increase of the dip angel，the uniaxial compressive strength of specimens decreases first then increases. The uniaxial compressive strength reaches the minimum value when the dip angle equals to 45° to 60°. When the dip angle equals to 90°，the uniaxial compressive strength of specimen increases first and then decreases with the increase of the distance between the holes，and reaches the maximum value when the distance between holes equals to 40 mm approximately. The fractures generated in the specimen can be classified into three modes，namely mode I (tensile fracture)，mode II (shear fracture) and mode III (mixed fracture). When the distance between the holes is small，with the increase of dip angle，the fracture mode between the holes changes from mode III to mode II gradually, while on the hole walls adjacent to loading part, mode I fracture occurs. However，mode II fracture always occurs on the hole walls adjacent to the side boundaries of specimen. When the dip angle equals to 90°，the interaction between two holes weakens with the increase of the distance between holes，however，the mode I fracture occurs on the hole walls adjacent to loading part and the mode II fracture occurs on the hole walls adjacent to the side boundaries all the time. The mode II fracture firstly initiates on the rock bridge between two holes，and then mode I fracture generates on the hole walls adjacent to loading part，and finally mode II fracture occurs on the hole walls adjacent to the side boundaries. Generally，the magnitude of acoustic emission (AE) from the mode I fracture is higher than that from the mode II fracture.

Key words： rock mechanics uniaxial compression mechanical properties particle flow code(PFC)

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHOU Yu1
	LIU Bing1
	WANG Li2
	LI Xiang1
	DING Yinping3

Cite this article:

ZHOU Yu1,LIU Bing1,WANG Li2, et al. Mesoscopic mechanical properties of rock-like material containing two circular holes under uniaxial compression[J]. , 2017, 36(11): 2662-2671.

URL:

http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.0501 OR http://www.rockmech.org/EN/Y2017/V36/I11/2662

[12]	李银平，王元汉，陈龙珠，等. 含预制裂纹大理岩的压剪试验分析[J]. 岩土工程学报，2004，26(1)：120-124.(LI Yinping，WANG Yuanhan，CHEN Longzhu，et al. Experimental research on pre-existing cracks in marble under compression[J]. Chinese Journal of Geotechnical Engineering，2004，26(1)：120-124.(in Chinese))
[15]	POTYONDY D O，CUNDALL P A. A bonded-particle model for rock[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(8)：1 329-1 364. " target="_blank">
[16]	CHO N，MARTIN C D，SEGO D C. A clumped particle model for rock[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(7)：997-1 010.
[10]	ZHANG X P，WONG L N Y. Cracking processes in rock-like material containing a single flaw under uniaxial compression：a numerical study based on parallel bonded-particle model approach[J]. Rock Mechanics and Rock Engineering，2012，45(5)：711-737.
[11]	周喻，吴顺川，王莉，等. 等效岩体技术在断续双节理岩石试件破裂机制细观分析中的应用[J]. 岩土力学，2013，34(10)：2 801- 2 809.(ZHOU Yu，WU Shunchuan，WANG Li，et al. Application of equivalent rock mass technique to mesoscopic analysis of fracture mechanism of rock specimen containing two intermittent joint[J]. Rock and Soil Mechanics，2013，34(10)：2 801-2 809.(in Chinese))
[18]	王莉，谭卓英，周喻，等. 煤样巴西劈裂试验中声发射特性的细观模拟[J]. 北京科技大学学报，2014，36(3)：275-282.(WANG Li，TAN Zhuoying，ZHOU Yu，et al. Mesoscopic simulative research on acoustic emission characteristic of coal sample in Brazilian test[J]. Journal of University of Science and Technology Beijing，2014，36(3)：275-282.(in Chinese))
[17]	周喻，吴顺川，许学良，等. 岩石破裂过程中声发射特性的颗粒流分析[J]. 岩石力学与工程学报，2013，32(5)：951-959.(ZHOU Yu，WU Shunchuan，XU Xueliang，et al. Particle flow analysis of acoustic emission characteristics during rock failure process[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(5)：951-959.(in Chinese))
[1]	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.
[5]	刘学伟，刘泉声，陈元，等. 裂隙形式对岩体强度特征及破坏模式影响的试验研究[J]. 岩土力学，2015，36(增2)：208-214.(LIU Xuewei，LIU Quansheng，CHEN Yuan，et al. Experimental study of effects of fracture type on strength characteristics and failure modes of fractured rock mass[J]. Rock and Soil Mechanics，2015，36(Supp. 2)：208-214.(in Chinese)) " target="_blank">
[14]	CUNDALL P A，STRACK O D L. A discrete numerical model for granular assemblies[J]. International Journal of Rock Mechanics and Mining Sciences，1979，29(1)：47-65. " target="_blank">
[3]	杨圣奇，戴永浩，韩立军，等. 断续预制裂隙脆性大理岩变形破坏特性单轴压缩试验研究[J]. 岩石力学与工程学报，2009，28(12)：2 391-2 404.(YANG Shengqi，DAI Yonghao，HAN Lijun，et al. Uniaxial compression experimental research on deformation and failure properties of brittle marble specimen with pre-existing fissures[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(12)：2 391-2 404.(in Chinese))
[8]	TANG C A，YANG W T，FU Y F，et al. A new approach to numerical method of modelling geological processes and rock engineering problems-continuum to discontinuum and linearity to nonlinearity[J]. Engineering Geology，1998，49(3/4)：207-214. " target="_blank">
[2]	WONG L N Y，EINSTEIN H H. Crack coalescence in molded gypsum and carrara marble：part 2—microscopic observations and interpretation[J]. Rock Mechanics and Rock Engineering，2009，42(3)：513-545.
[6]	周辉，徐荣超，卢景景，等. 板裂化模型试样失稳破坏及其裂隙扩展特征的试验研究[J]. 岩土力学，2015，36(增2)：1-11.(ZHOU Hui，XU Rongchao，LU Jingjing，et al. Experimental study of instability destruction and crack propagation characteristics of slab failure model specimen[J]. Rock and Soil Mechanics，2015，36(Supp. 2)：1-11.(in Chinese))
[4]	杨磊，李术才，郭彦双，等. 三维裂隙间距对砂浆材料力学特性的影响[J]. 岩土力学，2010，31(1)：32-38.(YANG Lei，LI Shucai，GUO Yanshuang，et al. Influence of space between 3D-cracks on mechanical feature of mortar material[J]. Rock and Soil Mechanics，2010，31(1)：32-38.(in Chinese))
[7]	陈新，廖志红，李德建. 节理倾角及连通率对岩体强度、变形影响的单轴压缩试验研究[J]. 岩石力学与工程学报，2011，30(4)：781-789.(CHEN Xin，LIAO Zhihong，LI Dejian. Experimental study of effects of joint inclination angle and connectivity rate on strength and deformation properties of rock masses under uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(4)：781-789.(in Chinese))
[9]	朱万成，张敏思，张洪训，等. 节理岩体表征单元体尺寸确定的数值模拟[J]. 岩土工程学报，2013，35(6)：1 121-1 127.(ZHU Wancheng，ZHANG Minsi，ZHANG Hongxun，et al. Numerical simulation for determining the size of representative element volume (REV) of jointed rock mass[J]. Chinese Journal of Geotechnical Engineering，2013，35(6)：1 121-1 127.(in Chinese))
[13]	朱谭谭，靖洪文，苏海健，等. 含双圆形孔洞砂岩单轴压缩力学特性试验研究[J]. 岩土工程学报，2015，37(6)：1 047-1 056.(ZHU Tantan，JING Hongwen，SU Haijian，et al. Study on mechanical behavior of sandstone containing double circular cavities under uniaxial compression[J]. Chinese Journal of Geotechnical Engineering，2015，37(6)：1 047-1 056.(in Chinese))