围压条件下岩石循环冲击损伤的能量特性研究

摘要
图/表
参考文献(16)
相关文章 (15)

全文: PDF (1899 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要在不同围压等级和冲击荷载循环作用下，利用带围压装置的霍普金森压杆设备，对斜长角闪岩、绢云母石英片岩和砂岩的动态力学性能进行试验研究，得到不同循环作用次数下岩样的应力–应变曲线。通过理论分析建立岩石损伤度的判定标准，并定义累积比能量吸收参量来表征围压条件下岩样冲击损伤的能量特性。3种岩石损伤度与围压和累积比能量吸收值的关系研究表明：累积比能量吸收参量能很好的描述围压条件下岩样的冲击损伤程度，岩石循环冲击损伤演化过程存在围压效应，当围压逐渐增大时，岩石损伤度的增加随累积比能量吸收值增加的趋势变缓，其抗冲击损伤的能力增强，即围压越高，试件达到相同损伤度所需要耗散的能量越多。得出围压条件下岩石损伤度与累积比能量吸收值的关系式。随着围压的增加，砂岩达到损伤阈值时的累积比能量吸收值增长率最大，斜长角闪岩次之，绢云母石英片岩最小。

	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
	许金余1
	2
	吕晓聪1
	3
	张军3
	王泽东1
	白二雷1

关键词 ：岩石力学, 损伤度, 累积比能量吸收, 围压

Abstract：Dynamic mechanical performance experiments were carried out for three types of rocks under different confining pressures and cyclical impact loadings by using split Hopkinson pressure bar with confining pressure device. The stress-strain curves of specimens under cyclical impact loadings were obtained. According to theoretical analysis，a determinant criterion of damage degree of rock was established；and the accumulative specific energy absorbency was defined to describe energy properties of rock dynamic damage. The studies of the relationships among damage degree of rock，accumulative specific energy absorbency and confining pressure under cyclical impact loadings show that accumulative specific energy absorbency could well describe the damage degree of rock. When the confining pressure increases gradually，the incremental tendency of damage becomes slow along with the accumulative specific energy absorbency，i.e.，the higher the confining pressure is，the more energy for rock to reach the same damage level is needed. The formulae of rock damage degree and accumulative specific energy absorbency are put forward under confining pressures. When the damage threshold is reached，the growth rate of accumulative specific energy absorbency of sandstone is the largest along with the increase in confining pressure，the rate of sericite quartz schist is the smallest，and the rate of plagioclase amphibolite is between ones of sandstone and sericite quartz schist.

Key words： rock mechanics damage degree accumulative specific energy absorbency confining pressure

引用本文:

许金余1，2，吕晓聪1，3，张军3，王泽东1，白二雷1. 围压条件下岩石循环冲击损伤的能量特性研究[J]. 岩石力学与工程学报, 2010, 29(S2): 4159-4165.
XU Jinyu1，2，LU Xiaocong1，3，ZHANG Jun3，WANG Zedong1，BAI Erlei1. RESEARCH ON ENERGY PROPERTIES OF ROCK CYCLICAL IMPACT DAMAGE UNDER CONFINING PRESSURE. , 2010, 29(S2): 4159-4165.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2010/V29/IS2/4159

[1] 何满潮，钱七虎. 深部岩体力学研究进展[C]// 第九届全国岩石力学与工程学术大会论文集. 北京：科学出版社，2006：49–62.(HE Manchao，QIAN Qihu. Summary of basic research on rock mechanics at great depth[C]// Proceedings of the 9th National Conference on Rock Mechanics and Engineering. Beijing：Science Press，2006：49–62.(in Chinese))

[2] 黄理兴，陈奕柏. 我国岩石动力学研究状况与发展[J]. 岩石力学与工程学报，2003，22(11)：1 881–1 886.(HUANG Lixing，CHEN Yibai. Rock dynamics in China：past，present and future[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(11)：1 881–1886.(in Chinese))

[3] 闫长斌. 爆破作用下岩体累积损伤效应及其稳定性研究[博士学位论文][D]. 长沙：中南大学，2006.(YAN Changbin. Study on cumulative damage effects and stability of rock mass under blasting loading[Ph. D. Thesis][D]. Changsha：Central South University，2006. (in Chinese))

[4] 凌建明，孙钧. 脆性岩石的细观裂纹损伤及其时效特征[J]. 岩石力学与工程学报，1993，12(4)：304–312.(LING Jianming，SUN Jun. On mesocrack damage of brittle rocks and its time-dependent characteristics[J]. Chinese Journal of Rock Mechanics and Engineering，1993，12(4)：304–312.(in Chinese))

[5] MENENDEZ B，ZHU W，WONG T F. Micromechanics of brittle faulting and cataclastic flow in Berea sandstone[J]. Journal of Structural Geology，1996，18(1)：1–16.

[6] GATELIER N，PELLET F，LORET B. Mechanical damage of an anisotropic porous rock in cyclic triaxial tests[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(3)：335–354.

[7] MEGLIS I L， CHOW T M，MARTIN C D，et al. Assessing in situ microcrack damage using ultrasonic velocity tomography[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(l)：25–34.

[8] 杨小林，员小有，吴忠，等. 爆破损伤岩石力学特性的试验研究[J]. 岩石力学与工程学报，2001，20(4)：436–439.(YANG Xiaolin，YUAN Xiaoyou，WU Zhong，et al. Experimental study on mechanical properties of blasting damaged rock[J]. Chinese Journal of Rock Mechanics and Engineering，2001，20(4)：436–439.(in Chinese))

[9] 李夕兵，周子龙，叶州元，等. 岩石动静组合加载力学特性研究[J]. 岩石力学与工程学报，2008，27(7)：1 387–1 395.(LI Xibing，ZHOU Zilong， YE Zhouyuan，et al. Study of rock mechanical characteristics under coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(7)：1 387–1 395.(in Chinese))

[10] 尤明庆，苏承东，李小双. 损伤岩石试样的力学特性与纵波速度关系研究[J]. 岩石力学与工程学报，2008，27(3)：458–467.(YOU Mingqing，SU Chengdong，LI Xiaoshuang. Study on relation between mechanical properties and longitudinal wave velocities for damaged rock samples[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(3)：458–467.(in Chinese))

[11] 苏承东，张振华. 大理岩三轴压缩的塑性变形与能量特征分析[J]，岩石力学与工程学报，2008，27(2)：273–280.(SU Chengdong， ZHANG Zhenhua. Analysis of plastic deformation and energy property of marble under pseudo-triaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(2)：273–280.(in Chinese))

[12] FREW D J，FORRESTAL M J，CHEN W. Pulse shaping techniques for testing brittle materials with a split Hopkinson pressure bar[J]. Experimental Mechanics，2002，42(1)：93–106.

[13] CHEN W，LU F，FREW D J，et al. Dynamic compression testing of soft materials[J]. Journal of Applied Mechanics，2002，69(3)：214–223.

[14] 李为民，许金余，沈刘军，等. f100 mm SHPB应力均匀及恒应变率加载试验技术研究[J]. 振动与冲击，2008，27(2)：129–132.(LI Weimin，XU Jinyu，SHEN Liujun，et al. Study on 100-mm-diameter SHPB techniques of dynamic stress equilibrium and nearly constant strain rate loading[J]. Journal of Vibration and Shock，2008，27(2)：129–132.(in Chinese))

[15] 吕晓聪，许金余，张龙，等. 大直径SHPB系统角闪岩的冲击动力试验[C]// 第九届全国冲击动力学学术会议. 焦作：[s.n.]，2009：362–368.(LU Xiaocong，XU Jinyu，ZHANG Long，et al. Impactive experimental research of olite using large-diameter SHPB equipment[C]// Proceedings of the 9th National Conference on Shock Impact Dynamics. Jiaozuo：[s.n.]，2009：362–368.(in Chinese))

[16] 吕晓聪，许金余，葛洪海，等. 围压对砂岩动态冲击力学性能的影响[J]. 岩石力学与工程学报，2010，29(1)：193–201.(LU Xiaocong，XU Jinyu，Ge Honghai，et al. Dynamic impactive experimental research of sandstone under confining pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(1)：193–201.(in Chinese))