岩石分级加载蠕变的能量耗散与变形机制研究

doi:10.13722/j.cnki.jrme.2015.0724

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摘要通过对岩石加载–蠕变–卸载的能量转换与变形机制分析，利用RLW–2000型岩石三轴流变仪，对2组岩石进行单轴分级加载蠕变试验，分析岩石不同应变差值下能量的耗散过程，确定岩石不同加载水平(或循环次数)与变形模量的关系，研究加载蠕变与应力卸载的曲线路径。结果表明：岩石分级加载蠕变的能量转换可分为加载应变与蠕变应变2个部分，随着每一级载荷作用下应变差的增加，岩石塑性应变能与耗散能呈非线性增加趋势，且塑性应变能曲线与耗散能曲线的开口、应变差及岩石损耗能量也越大；在相同加载水平下，岩石塑性应变能大于耗散能，且应变差与塑性应变能、耗散能的关系可分别用二次多项式、乘幂函数进行描述；岩石变形模量随着加载水平(或循环次数)的增加而变大，表现为先突然增加较大到缓慢增加至趋于相对平缓，相同加载水平(或循环次数)下，高强度岩石变形模量大于低强度岩石变形模量；岩石加载蠕变应变与卸载应力松弛均随加载水平的提高而增大，相同加载水平下，高强度岩石蠕变应变小于低强度岩石蠕变应变，但高强度岩石应力松弛大于低强度岩石应力松弛，高强度岩石加载曲线穿越上一级载荷卸载后的应力松弛区，而低强度岩石加载曲线则穿越上一级加载水平后的蠕变应变区。

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	辛亚军1
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	李梦远1

关键词 ：岩石力学, 岩石蠕变, 塑性应变能, 耗散能, 变形模量, 应变差, 曲线拟合

Abstract：Based on analysis of deformation mechanism and energy conversion in rock loading-creep-unloading，the creep tests of step uniaxial loading on two groups samples were operated by RLW–2000 rock triaxial rheometer. The rock energy dissipation was analyzed in different strain differences，the relationship of different loading level(or cycle number) and deformation modulus were determined，and curve paths of loading creep and unloading stress were studied. The results showed that energy conversion had two parts of loading strain and creep one in step-loading rock creep. With strain difference of every loading increasing，rock plastic strain and dissipation energy increased nonlinearly，and the opens，strain differences and loss rock energy of plastic strain and dissipation energy curves increased. In same loading，rock plastic strain energy was larger than dissipation one，and the relationships of strain difference and plastic strain energy，dissipation one，can be described by quadratic polynomial and power function respectively. Rock deformation modulus increased from abruptly to slowly，and then relative gently with loading level(or cycle number) increasing，and deformation modulus of the higher-strength rock was larger than the lower one in same loading level(or cycle number). Rock loading creep strain and unload stress relaxation increased with loading level increasing，the creep strain in higher-strength rock was less than the lower and stress relaxation went by contrary in same loading level. Loading curve of the higher-strength rock was cross the stress relaxation zone of last step unloading，and the lower one cross the creep strain zone.

Key words： rock mechanics rock creep plastic strain energy dissipation energy deformation modulus strain difference curve fitting

引用本文:

辛亚军1，2，李梦远1. 岩石分级加载蠕变的能量耗散与变形机制研究[J]. 岩石力学与工程学报, 2016, 35(S1): 2883-2897.
XIN Yajun1，2，LI Mengyuan1. Study on deformation mechanism and energy dissipation of rock creep under step loading. , 2016, 35(S1): 2883-2897.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2015.0724 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS1/2883

[1] 刘学增，苏京伟，王晓形. 不同围岩级别凝灰熔岩剪切流变特性的试验研究[J]. 岩石力学与工程学报，2009，28(1)：190–197.(LIU Xuezeng，SU Jingwei，WANG Xiaoxing. Experimental investigation on shear rheological properties of tuff lava with different grades[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(1)：190–197.(in Chinese))

[2] 高延法，曲祖俊，牛学良，等. 深井软岩巷道围岩流变与应力场演变规律[J]. 煤炭学报，2007，32(12)：1 244–1 252.(GAO Yanfa，QU Zujun，NIU Xueliang，et al. Rheological law for soft rock tunnel and evolution law for stress field in deep mine[J]. Journal of China Coal Society，2007，32(12)：1 244–1 252.(in Chinese))

[3] 韦四江，勾攀峰，于春生. 大断面破碎硐室围岩蠕变模拟及控制技术[J]. 采矿与安全工程学报，2013，30(4)：489–494.(WEI Sijiang，GOU Panfeng，YU Chunsheng. Creep simulation on fractured surrounding rock of large section chamber and its control technology[J]. Journal of Mining and Safety Engineering，2013，30(4)：489–494.(in Chinese))

[4] 李欣，高谦，刘增辉，等. 金川III矿区硐室围岩蠕变特性与支护时机[J]. 北京科技大学学报，2011，33(10)：1 182–1 189.(LI Xin，GAO Qian，LIU Zenghui，et al. Creep features of surrounding rock and supporting time for the chamber in Jinchuan Mine No.3[J]. Journal of University of Science and Technology Beijing，2011，33(10)：1 182–1 189.(in Chinese))

[5] 赵闯，武科，李术才，等. 循环荷载作用下岩石损伤变形与能量特征分析[J]. 岩土工程学报，2013，35(5)：890–896.(ZHAO Chuang，WU Ke，LI Shucai，et al. Energy characteristics and damage deformation of rock subjected to cyclic loading[J]. Chinese Journal of Geotechnical Engineering，2013，35(5)：890–896.(in Chinese))

[6] 张志镇，高峰. 单轴压缩下岩石能量演化的非线性特性研究[J]. 岩石力学与工程学报，2012，31(6)：1 198–1 207.(ZHANG Zhizhen，GAO Feng. Research on nonlinear characteristics of rock energy evolution under uniacial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(6)：1 198–1 207.(in Chinese))

[7] 喻勇，张宗贤，俞洁，等. 岩石直接拉伸破坏中的能量耗散及损伤特征[J]. 岩石力学与工程学报，1998，17(4)：386–392.(YU Yong，ZHANG Zongxian，YU Jie，et al. Energy dissipation and damage characters in rock direct tensile destruction[J]. Chinese Journal of Rock Mechanics and Engineering，1998，17(4)：386–392. (in Chinese))

[8] 杨圣奇，徐卫亚，苏承东. 岩样单轴压缩变形破坏与能量特征研究[J]. 固体力学学报，2006，27(2)：213–216.(YANG Shengqi，XU Weiya，SU Chengdong. Study of the deformation failure and energy properties of rock specimen in uniaxial compression[J]. Acta Mechanica Solida Sinica，2006，27(2)：213–216.(in Chinese))

[9] 周光文，刘文岗，姜耀东，等. 采场冲击地压的能量积聚释放特征分析[J]. 采矿与安全工程学报，2008，25(1)：73–78.(ZHOU Guangwen，LIU Wengang，JIANG Yaodong，et al. Characteristics of energy accumulation and release of rock outburst in mining face[J]. Journal of Mining and Safety Engineering，2008，25(1)：73–78.(in Chinese))

[10] 张媛，许江，杨红伟，等. 循环荷载作用下围压对砂岩滞回环演化规律的影响[J]. 岩石力学与工程学报，2011，30(2)：320–326. (ZHANG Yuan，XU Jiang，YANG Hongwei，et al. Effect of confining pressure on evolution law of hysteresis loop of sandstone under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(2)：320–326.(in Chinese))

[11] 何明明，陈蕴生，韩铁林，等. 不同应力路径下砂岩能耗特征的研究[J]. 岩石力学与工程学报，2015，34(增1)：2 632–2 638.(HE Mingming，CHEN Yunsheng，HAN Tielin，et al. Study of energy properties of sandstone under different loading paths[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.1)：2 632–2 638.(in Chinese))

[12] 焦贵德，赵淑萍，马巍，等. 循环荷载下冻土的滞回圈演化规律[J]. 岩石力学与工程学报，2013，35(7)：1 343–1 349.(JIAO Guide，ZHAO Shuping，MA Wei，et al. Evolution laws of hysteresis loops of frozen soil under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2013，35(7)：1 343–1 349. (in Chinese))

[13] 许江，李波波，周婷，等. 循环荷载作用下煤变形与能量演化规律试验研究[J]. 岩石力学与工程学报，2014，33(增2)：3 563– 3 572.(XU Jiang，LI Bobo，ZHOU Ting，et al. Experimental study of deformation and energy evolution law of coal under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：3 563–3 572.(in Chinese))

[14] 张志镇，高峰. 受载岩石能量演化的围压效应研究[J]. 岩石力学与工程学报，2015，34(1)：1–11.(ZHANG Zhizhen，GAO Feng. Confining pressure effect on rock energy[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(1)：1–11.(in Chinese))

[15] 徐鹏，杨圣奇. 循环加卸载下煤的黏弹塑性蠕变本构关系研究[J]. 岩石力学与工程学报，2015，34(3)：537–545.(XU Peng，YANG Shengqi. Study of visco-elasto-plastic constitutive model of coal under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(3)：537–545.(in Chinese))

[16] 杨永杰，宋扬，楚俊. 循环荷载作用下煤岩强度及变形特征试验研究[J]. 岩石力学与工程学报，2007，26(1)：201–205.(YANG Yongjie，SONG Yang，CHU Jun. Experimental study of characteristics of strength and deformation of coal under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(1)：201–205. (in Chinese))

[17] 陈亮，刘建锋，王春萍，等. 不同温度及应力状态下北山花岗岩蠕变特征研究[J]. 岩石力学与工程学报，2015，34(6)：1 228–1 235. (CHEN Liang，LIU Jianfeng，WANG Chunping，et al. Creeping behavior of Beishan granite under different temperatures and stress conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(6)：1 228–1 235. (in Chinese))

[18] ZHANG Z X，KOU S Q，JIANG L G. Effects of loading rate on rock fracture：fracture characteristics and energy partitioning[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(3)：745–762.

[19] 刘建锋，徐进，李青松. 循环荷载下岩石阻尼参数测试的试验研究[J]. 岩石力学与工程学报，2010，29(5)：1 036–1 041.(LIU Jianfeng，XU Jin，LI Qingsong. Experimental research on damping parameters of rock under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(5)：1 036–1 041.(in Chinese))

[20] 黎立云，鞠杨，赵占文，等. 静动态加载下岩石结构破坏时的能量分析[J]. 煤炭学报，2009，35(6)：737–740.(LI Liyun，JU Yang，ZHAO Zhanwen，et al. Energy analysis of rock structure under static and dynamic loading conditions[J]. Journal of China Coal Society，2009，35(6)：737–740.(in Chinese))

[21] 黎立云，王荣新，马旭，等. 双向加压下岩石能量规律的实验研究[J]. 煤炭学报，2010，35(12)：2 033–2 038.(LI Liyun，WANG Rongxin，MA Xu，et al. The energy variety analysis of rock under biaxial compression[J]. Journal of China Coal Society，2010，35(12)：2 033–2 038. (in Chinese))

[22] BAGDE M N，PETROS V. Fatigue and dynamic energy behaviour of rock subjected to cyclical loading[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(1)：200–209.

[23] 周家文，杨兴国，符文熹，等. 脆性岩石单轴循环加卸载试验及断裂损伤力学特性研究[J]. 岩石力学与工程学报，2010，29(6)：1 172–1 183.(ZHOU Jiawen，YANG Xingguo，FU Wenxi，et al. Experimental test and fracture damage mechanical characteristics of brittle rock under uniaxial cyclic loading and unloading conditions [J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(6)：1 172–1 183. (in Chinese))

[24] 刘江伟，黄炳香，魏民涛. 单轴循环荷载对煤弹塑性和能量积聚耗散的影响[J]. 辽宁工程技术大学学报：自然科学版，2012，31(1)：26–30.(LIU Jiangwei，HUANG Bingxiang，WEI Mintao. Influence of cyclic uniaxial loading on coal elastio-plastic properties and energy accumulation and dissipation[J]. Journal of Liaoning Technical University：Natural Science，2012，31(1)：26–30.(in Chinese))

[25] 谢和平，彭瑞东，鞠杨，等. 岩石破坏的能量分析初探[J]. 岩石力学与工程学报，2005，24(15)：2 603–2 607.(XIE Heping，PENG Ruidong，JU Yang，et al. On energy analysis of rock failure[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(15)：2 603–2 607.(in Chinese))

[26] 谢和平，鞠杨，黎立云，等. 岩体变形破坏过程的能量机制[J]. 岩石力学与工程学报，2008，27(9)：1 729–1 740. (XIE Heping，JU Yang，LI Liyun，et al. Energy mechanism of deformation and failure of rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(9)：1 729–1 740. (in Chinese))

[27] 赵洪宝，尹光志. 循环载荷作用下突出煤力学性质演化分析[J]. 重庆大学学报，2012，35(3)：103–107.(ZHAO Hongbao，YIN Guangzhi. Analysis of mechanical properties evolution of outburst coal under cyclic loading[J]. Journal of Chongqing University，2012，35(3)：103–107.(in Chinese))

[28] ZHOU X P，YANG H Q，ZHANG Y X. Rate dependent critical strain energy density factor of Huanglong limestone[J]. Theoretical and Applied Fracture Mechanics，2009，51(1)：57–61.

[29] 肖福坤，申志亮，刘刚，等. 循环加卸载中滞回环与弹塑性应变能关系研究[J]. 岩石力学与工程学报，2014，33(9)：1 791–1 797. (XIAO Fukun，SHEN Zhiliang，LIU Gang，et al. Relationship between hysteresis loop and elastoplastic strain energy during cyclic loading and unloadJ]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)：1 791–1 797.(in Chinese))

[30] 中华人民共和国行业标准编写组. GT/T23561—2009 煤和岩石物理力学性质测定方法[S]. 北京：中国标准出版社，2009.(The Professional Standards Compilation Group of Peoples Republic of China. GT/T23561—2009 Methods for determining the physical and mechanical properties of coal and rock[S]. Beijing：Standards Press of China，2009.(in Chinese))