复杂预应力路径和异源动力扰动下岩石破裂机制研究

doi:10.13722/j.cnki.jrme.2015.0982

Abstract
Figure/Table
References (22)
Related Citation (15)

Download: PDF (1931 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The force form of the surrounding rocks in underground engineering is coupled static-dynamic loads after true triaxial unloading-loading. The mechanical properties of the surrounding rock under frequent disturbance are easy to be degraded，which can induce engineering disasters such as rock burst and so on. Based on the complex stress environment of surrounding rocks，rock failure tests under the complex true triaxial pre-stressed path and local dynamic disturbance were carried out. The test results show that rock failure occurred when the amplitude of the local dynamic load was in a relatively large level，and the failure mode is splitting tensile failure. PFC3D was used to reappear the lab experiment and study the microscopic characteristics of rock failure under dynamic disturbance. When the amplitude of the local dynamic load was less than 250 kN，both shear cracks and tensile cracks were triggered and their number keep stable. When the amplitude of the local dynamic load was 300 kN，the shear cracks and the tensile cracks spread from the perturbation load position to the entire specimen. The number of tensile cracks exceeded the number of shear cracks while the rock got final failure. The results of lab test and simulation are consistent.

Key words： rock mechanics true triaxial unloading dynamic load failure mechanism

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	DU Kun1
	2
	3
	LI Xibing2
	DONG Longjun2
	TAO Ming2
	ZHOU Jian2

Cite this article:

DU Kun1,2,3, et al. FRACTURE MECHANISM OF ROCK INDUCED BY TRUE-TRIAXIAL UNLOADING AND HETEROLOGY DYNAMIC DISTURBANCE[J]. , 2015, 34(S2): 4047-4053.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0982 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/4047

[1]	蔡美峰. 岩石力学与工程[M]. 北京：科学出版社，2002：30-78.(CAI Meifeng. Rock mechanics and engineering[M]. Beijing：Science Press，2002：30-78.(in Chinese))
[2]	潘鹏志，冯夏庭，邱士利，等. 多轴应力对深埋硬岩破裂行为的影响研究[J]. 岩石力学与工程学报，2011，30(6)：1 116-1 125.( PAN Pengzhi，FENG Xiating，QIU Shili，et al. Study of failure behavior of deep hard rock under polyaxial stress conditions[J].Chinese Journal of Rock Mechanics and Engineering，2011，30(6)：1 116-1 125.(in Chinese))
[3]	BROWN ET，HOEK E. Trends in relationships between measured in-situ stresses and depth[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1978，15(4)：211-215.
[4]	何满潮，钱七虎. 深部岩体力学基础[M]. 北京：科学出版社，2010：16-22.(HE Manchao，QIAN Qihu. The basis of deep rock mechanics[M]. Beijing：Science Press，2010：16-22.(in Chinese))
[5]	钱七虎，李树忱. 深部岩体工程围岩分区破裂化现象研究综述[J]. 岩石力学与工程学报，2008，27(6)：1278-1284.(QIAN Qihu，LI Shuchen. A review of research on zonal disintegration phenomenon in deep rock mass engineering[J].Chinese Journal of Rock Mechanics and Engineering，2008，27(6)：1278-1284.(in Chinese))
[6]	LI T，CAI MF，CAI M. A review of mining-induced seismicity in China[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(8)：1149-1171.
[7]	CAI M. Influence of intermediate principal stress on rock fracturing and strength near excavation boundaries-insight from numerical modeling[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45(5)：763-772.
[8]	李夕兵，姚金蕊，杜坤. 高地应力硬岩矿山诱导致裂非爆连续开采初探——以开阳磷矿为例[J]. 岩石力学与工程学报，2013，32(6)：1 101-1 111.(LI Xibing，YAO Jinrui，DU Kun. Preliminary study for induced fracture and non-explosive continuous mining in high-geostress hard rock mine—a case study of kaiyang phosphate mine[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(6)：1101-1111.(in Chinese))
[9]	JING L. A review of techniques，advances and outstanding issues in numerical modelling for rock mechanics and rock engineering[J].International Journal of Rock Mechanics and Mining Sciences，2003，40(3)：283-353.
[10]	周子龙，李国楠，宁树理，等. 侧向扰动下高应力岩石的声发射特性与破坏机制[J]. 岩石力学与工程学报，2014，33(8)：1 720-1 728.(ZHOU Zilong，LI Guonan，NING Shuli，et al. Acoustic emission characteristics and failure mechanism of high-stressed rocks under lateral disturbance[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(8)：1 720-1 728.(in Chinese))
[11]	刘宁，张春生，褚卫江. 深埋大理岩脆性破裂细观特征分析[J]. 岩石力学与工程学报，2012，31(增2)：3 557-3565.(LIU Ning，ZHANG Chunsheng，CHU Weijiang. Microscopic characteristics analysisof brittlefailure of deep buried marble[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.2)：3 557-3565.(in Chinese))
[12]	MOGI K. Fracture and flow of rocks under high triaxial compression[J].Journal of Geophysical Research，1971，76(5)：1255-1269.
[13]	MICHELIS P. A true-triaxial cell for low and high pressure experiments[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1985，22(3)：183-188.
[14]	陶振宇，高延法. 红砂岩真三轴压力试验与岩石强度极限统计[J]. 武汉水利电力大学学报，1993，26(4)：300-305.(TAOZhenyu，GAOYanfa. True triaxial pressure experiment for red sand rock and limit statisties of rock strength[J]. Journal of Wuhan University of Hydraulic and Electrical Engineering，1993，26(4)：300-305.(in Chinese))
[15]	HAIMSON B，CHANG C. A new true-triaxial cell for testing mechanical properties of rock，and its use to determine rock strength and deformability of Westerly granite[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(1)：285-296.
[16]	陈景涛，冯夏庭. 高地应力下岩石的真三轴试验研究[J]. 岩石力学与工程学报，2006，25(8)：1 537-1 543.(CHEN Jingtao，FENG Xiating. True triaxial experimental study on rock with high geostress[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(8)：1 537-1 543.(in Chinese))
[17]	GONG QM，YIN LJ，WU SY，et al. Rockburst and slabbing failure and its influence on TBM excavation at headrace tunnels in Jinping II hydropower station[J]. EngineeringGeology，2012，124(1)：98-108.
[18]	HE M C，MIAO J L，FENG J L. Rockburst process of limestone and its acoustic emission characteristics under true-triaxial unloading conditions[J]. International Journal of Rock Mechanics and Mining Sciences，2010，47(2)：286-298.
[19]	DU K，LI X B，LI D Y. Failure properties of rocks in true-triaxial unloading compressive test[J]. Transaction ofNonferrous MetalsSocietyChina，2015，25(2)：571-581.
[20]	LIU EL，HE S M. Effects of cyclic dynamic loading on the mechanical properties of intact rock samplesunder confining pressure conditions[J]. EngineeringGeology，2012，125(1)：81-91.
[21]	叶洲元，李夕兵，周子龙，等. 三轴压缩岩石动静组合强度及变形特征的研究[J]. 岩土力学，2009，30(7)：1981-1986.(YE Zhouyuan，LI Xibing，ZGOU Zhilong，et al. Static-dynamic coupling strength and deformation characteristicsof rock under triaxial compression[J]. Rock and Soil Mechanics，2009，30(7)：1981-1986.(in Chinese))
[22]	YIN Z Q，LI X B，JIN J F，et al. Failure characteristics of high stress rock induced by impact disturbance under confining pressure unloading[J]. Transaction of NonferrMetalsSociety China，2012，22(1)：175-184.