原岩应力对裂纹动态断裂行为的影响规律研究

doi:10.13722/j.cnki.jrme.2019.0347

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1736 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要深地岩体赋存于高原岩应力环境，常常受到动力扰动。为了研究原岩应力对裂纹动态断裂行为的影响，使用侧向加压设备赋予岩石初始应力以模拟原岩应力，利用中低速落锤冲击设备实施冲击实验。在冲击实验中使用裂纹扩展计(CPG)获取裂纹起裂时刻和裂纹扩展速度，同时使用AUTODYN有限差分法软件和ABAQUS有限元软件实施数值模拟研究。实验和数值模拟结果显示，垂直于裂纹面的原岩应力改变了裂纹起裂时间、裂纹扩展速度和裂纹扩展长度，但是对临界动态应力强度因子没有影响。垂直于裂纹面的原岩应力使得裂纹起裂时间出现滞后现象，并且原岩应力越大裂纹扩展速度越低，裂纹扩展长度越短。

	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
	邓帅1
	2
	朱哲明1
	2
	王磊1
	2
	牛草原1
	2
	周磊1
	2
	应鹏1
	2

关键词 ：岩石力学, 原岩应力, 裂纹, 起裂时刻, 扩展速度, 临界动态应力强度因子

Abstract：Deep rock mass exists in high in-situ stress environment and is often disturbed by dynamic loads. In order to study the effect of in-situ stresses on the dynamic fracture behaviors of cracks，the initial stresses of rock were given by lateral pressure equipment to simulate in-situ stresses，and impact experiments were conducted with medium and low speed drop weight impact device. Crack initiation time and crack propagation velocity were obtained by using crack propagation gauge(CPG) in impact test，and numerical simulations were also carried out by using AUTODYN finite different code and ABAQUS finite element code. The experimental and numerical simulation results show that the in-situ stress perpendicular to the crack surface changes the initiation time，crack propagation speed and crack propagation length but has no effect on the critical dynamic stress intensity factor. The in-situ stress perpendicular to the crack surface delays the initiation time of the crack，and the larger the in-situ stress，the lower the crack propagation speed and the shorter the crack propagation length.

Key words： rock mechanics in-situ stresses crack initiation time crack propagation speed critical dynamic stress intensity factor

引用本文:

邓帅1，2，朱哲明1，2，王磊1，2，牛草原1，2，周磊1，2，应鹏1，2. 原岩应力对裂纹动态断裂行为的影响规律研究[J]. 岩石力学与工程学报, 2019, 38(10): 1989-1999.
DENG Shuai1，2，ZHU Zheming1，2，WANG Lei1，2，LIU Caoyuan1，2，ZHOU Lei1，2，YING Peng1，2. Study on the influence of in-situ stresses on dynamic fracture behaviors of cracks#br#. , 2019, 38(10): 1989-1999.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2019.0347 或 http://www.rockmech.org/CN/Y2019/V38/I10/1989

[2]	TAO M，LI X B，LI D Y. Rock failure induced by dynamic unloading under 3D stress state[J]. Theoretical and Applied Fracture Mechanics，2013，65：47-54.
[12]	夏开文，姚伟. 预加载下岩石的动态力学性能研究[J]. 工程爆破，2015，21(6)：7-13.(XIA Kaiwen，YAO Wei. Dynamic mechanical properties of rock under pre-load[J]. Engineering Blasting，2015，21(6)：7-13.(in Chinese))
[26]	YI C P，JOHANSSON D，GREBERG D. Effects of in-situ stresses on the fracturing of rock by blasting[J]. Computers and Geotechnics，2018，104：321-330.
[28]	FREUND L B. Dynamic fracture mechanics[M]. Cambridge：Cambridge University Press，1990：1-60.
[1]	BANADAKI M M D，MOHANTY B. Numerical simulation of stress wave induced fractures in rock[J]. International Journal of Impact Engineering，2012，40(2)：16-25.
[3]	王蒙，朱哲明，胡荣. 基于SCSCC试样的岩石复合型裂纹动态扩展特征研究[J]. 四川大学学报：工程科学版，2016，48(2)：57-65.(WANG Meng，ZHU Zheming，HU Rong. Rock experiments study of crack propagation under I and II mixed-mode dynamic loading using SCSCC specimens[J]. Journal of Sichuan University：Engineering Science，2016，48(2)：57-65.(in Chinese))
[4]	周磊，朱哲明，董玉清，等. 冲击加载下巷道内裂纹的扩展特性及破坏行为[J]. 爆炸与冲击，2018，38(4)：785-794.(ZHOU Lei，ZHU Zheming，DONG Yuqing，et al. Propagation characteristics and failure behaviors of crack in tunnel under impact loads[J]. Explosion and Shock Waves，2018，38(4)：785-794.(in Chinese))
[6]	ZHU Z M，WANG C，KANG J M，et al. Study on the mechanism of zonal disintegration around an excavation[J]. International Journal of Rock Mechanics and Mining Sciences，2014，67(4)：88-95.
[8]	KAISER P K，KIM B H. Characterization of strength of intact brittle rock considering confinement-dependent failure processes[J]. Rock Mechanics and Rock Engineering，2015，48(1)：107-119.
[9]	LI X B，GONG F Q，TAO M，et al. Failure mechanism and coupled static-dynamic loading theory in deep hard rock mining：A review[J]. Journal of Rock Mechanics and Geotechnical Engineering，2017，9(4)：767-782.
[11]	CHRISTENSEN R J，SWANSON S R，BROWN W S. Split- hopkinson-bar tests on rock under confining pressure[J]. Experimental Mechanics，1972，12(11)：508-513.
[13]	YANG R S，DING C X，LI Y L，et al. Crack propagation behavior in slit charge blasting under high static stress conditions[J]. International Journal of Rock Mechanics and Mining Sciences，2019，119：117-123.
[14]	CHEN R，LI K，XIA K W，et al. Dynamic fracture properties of rocks subjected to static pre-load using notched semi-circular bend method[J]. Rock Mechanics and Rock Engineering，2016，49(10)：3 865-3 872.
[16]	KUTTER H K，FAIRHURST C. On the fracture process in blasting[J]. International Journal of Rock Mechanics and Mining Sciences，1971，8(3)：181-202.
[18]	夏开文，徐颖，姚伟，等. 静荷预应力条件作用下岩板动态破坏行为试验研究[J]. 岩石力学与工程学报，2017，36(5)：86-96.(XIA Kaiwen，XU Ying，YAO Wei，et al. Experimental study of dynamic fracture behavior of brittle rockplate under static pre- loading[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(5)：86-96.(in Chinese))
[19]	YANG L Y，DING C X. Fracture mechanism due to blast-imposed loading under high static stress conditions[J]. International Journal of Rock Mechanics and Mining Sciences，2018，107：150-158.
[21]	YANG J H，YAO C，JIANG Q H，et al. 2D numerical analysis of rock damage induced by dynamic in-situ stress redistribution and blast loading in underground blasting excavation[J]. Tunnelling and Underground Space Technology，2017，70：221-232.
[23]	ZHU Z M，XIE H P，MOHANTY B. Numerical investigation of blasting-induced damage in cylindrical rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45(2)：111-121.
[24]	WEI C，ZHU W，BAI Y，et al. Numerical simulation on cutting seam cartridge blasting under different in-situ stress conditions[J]. Explosion and Shock Waves，2016，36(2)：161-169.
[5]	谢和平，高峰，鞠杨. 深部岩体力学研究与探索[J]. 岩石力学与工程学报，2015，34(11)：2 161-2 178.(XIE Heping，GAO Feng，JU Yang. Research and development of rock mechanics in deep ground engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(11)：2 161-2 178.(in Chinese))
[7]	WANG P，JIANG L S，JIANG J Q，et al. Strata behaviors and rock burst-inducing mechanism under the coupling effect of a hard，thick stratum and a normal fault[J]. International Journal of Geomechanics，2018，18(2)：04017135.
[15]	杨立云，杨仁树，许鹏，等. 初始压应力场对爆生裂纹行为演化效应的实验研究[J]. 煤炭学报，2013，38(3)：404-410.(YANG Liyun，YANG Renshu，XU Peng，et al. Experimental study on the effect of initial compression stress field on blast-induced crack behaviors[J]. Journal of the China Coal Society，2013，38(3)：404-410.(in Chinese))
[17]	ROSSMANITH H P，KNASMILLNER R E，DAEHNKE A，et al. Wave propagation，damage evolution，and dynamic fracture extension Part II[J]. Blasting Materials Science，1996，32(4)：403-410.
[25]	MA G W，AN X M. Numerical simulation of blasting-induced rock fractures[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45(6)：966-975.
[27]	DONG Y Q，ZHU Z M，ZHOU L，et al. Study of mode I crack dynamic propagation behaviour and rock dynamic fracture toughness by using SCT specimens[J]. Fatigue and Fracture of Engineering Materials and Structures，2018，41(8)：1 810-1 822.
[10]	HE C L，YANG J，YU Q. Laboratory study on the dynamic response of rock under blast loading with active confining pressure[J]. International Journal of Rock Mechanics and Mining Sciences，2018，102：101-108.
[20]	ZHU Z M，MOHANTY B，XIE H P. Numerical investigation of blasting-induced crack initiation and propagation in rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(3)：412-424.
[22]	XIE L X，LU W B，ZHANG Q B，et al. Damage evolution mechanisms of rock in deep tunnels induced by cut blasting[J]. Tunnelling and Underground Space Technology，2016，58：257-270.