Kaiser效应方向独立性的控制参数理论分析

傅翔; 班宇鑫; 谢强; 江小城

doi:10.11779/CJGE201912012

Kaiser效应方向独立性的控制参数理论分析 English Version

傅翔^1,2,3,
班宇鑫⁴,
谢强^4, ,,
江小城⁴

1. 重庆交通大学河海学院,重庆 400047;
2. 重庆交通大学水利水运工程教育部重点实验室,重庆 400047;
3. 长江水利委员会长江科学院水利部岩土力学与工程重点实验室,湖北武汉 430010;
4. 重庆大学土木工程学院,重庆 400044

基金项目: 国家重点研发计划项目（2018YFC0407002）; 重庆市科委项目（cstc2019jcyj-msxm2176）; 重庆市教委科学技术研究项目（KJQN201800745,KJQN201802501）; 国家内河航道整治工程技术研究中心暨水利水运工程教育部重点实验室开放基金项目（SLK2018B04）

详细信息

作者简介:
傅翔(1982— ),男,重庆人,博士,主要从事与岩土工程相关的科研工作。E-mail: fmsx2000@163.com。

通讯作者:
谢强，E-mail：xieqiang2000@163.com

中图分类号: TU459
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出版历程
- 收稿日期: 2018-10-31
- 发布日期: 2019-12-24

Theoretical analysis of controlling parameters of direction independence of Kaiser effect

1. Hehai School, Chongqing Jiaotong University, Chognqing 400047, China;
2. Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chognqing 400047, China;
3. Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources, Changjiang River Scientific Research Institute of Changjiang Water Resources Commission, Wuhan 430010, China;
4. School of Civil Engineering, Chongqing University, Chongqing 400044, China

摘要

摘要: 基于Kaiser效应由裂纹扩展释放弹性波的认识,当远场应力为压应力时,从断裂力学角度对Kaiser 效应随加载方向变化规律进行了分析,建立了临界应力 ${{\sigma }_{\text{c}}}$ 与裂纹面方向夹角 $\beta$ 、裂纹面摩擦系数 $f$ 的理论联系,揭示了Kaiser 效应方向独立性机理及其控制参数。结果表明：Kaiser效应方向独立性受临界应力相对值影响,其控制参数为初始加载方向与微裂纹面方向的夹角 ${{\beta }_{1}}$ 、裂纹面的摩擦系数 $f$ 。夹角 ${{\beta }_{1}}$ 越大,FR值大于1.1所需加载偏转相对角度 $\gamma$ 越小,加载方向偏转后所得应力与初始加载应力相差越大,Kaiser效应方向独立性越明显,即Kaiser效应测量初始应力精度与岩体初始微裂纹分布有关。摩擦系数 $f$ 越小,FR值大于1.1所需加载偏转相对角度 $\gamma$ 越大,加载方向偏转后所得应力和初始加载应力相差越小,Kaiser效应方向独立性越不明显,即岩样如越湿润,Kaiser效应测试初始应力结果离散性越大。以上结论与既有试验在变化规律上具有一致性,并通过特征曲线对比确定了试验控制参数为微裂纹面摩擦系数 $f$ 小于0.5、初始加载方向与微裂纹面方向夹角 ${{\beta }_{1}}$ 在30°~40°之间,这均与试验条件较为吻合。以上结论可为进一步研究Kaiser效应机理提供参考。
- Kaiser效应 /
- 裂纹扩展 /
- 方向独立性 /
- 临界应力相对值
Abstract: Based on the acknowledgement that the Kaiser effect is induced by the released elastic wave of crack propagation when the far-field stress is a compressive one, the variation of the Kaiser effect with loading direction is analyzed from the perspective of fracture mechanics. The theoretical relationship among the critical stress ${{\sigma }_{\text{c}}}$ , the direction of the crack surface $\beta$ and the friction coefficient $f$ of the crack surface is established. The mechanism of the direction independence of the Kaiser effect and its control parameters are revealed. The results show that the direction independence of the Kaiser effect is affected by the relative value of the critical stress, and the control parameters include the angle between the initial loading direction and micro-crack surface ${{\beta }_{1}}$ and the crack surface friction coefficient $f$ . When the angle ${{\beta }_{1}}$ is larger, the relative angle of loading deflection $\gamma$ is smaller to keep FR value greater than 1.1. There is greater difference between the stress obtained after the deflection of the loading direction and the initial loading stress, and the direction independence of Kaiser effect is more obvious. The accuracy of the initial stress measured by the Kaiser effect is related to the distribution of the initial microcrack of the rock mass. The smaller the friction coefficient $f$ , the larger the relative angle $\gamma$ required for the FR value to be greater than 1.1, and the smaller the difference between the meseared stress and the initial loading stress after the deflection, the less obvious the independence of the Kaiser effect. The watter the rock sample, the greater the dispersion when measuring the initial stress with Kaiser effect. The above conclusions are consistent with the rules of the previous test results. By comparing the characteristic curves, the control parameters are established: friction coefficient on the microcrack surface is less than 0.5, the angle between the initial loading direction and the microcrack surface is about 30°~40°, which agrees well with the test conditions. They can provide references for further studies on the mechanism of the Kaiser effect.
- Kaiser effect /
- crack propagation /
- direction independence /
- relative value of critical stress

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参考文献(23)

[1]	钱七虎. 地下工程建设安全面临的挑战与对策[J]. 岩石力学与工程学报, 2012, 31(10): 1945-1956. (QIAN Qi-hu.Challenges faced by underground projects construction safety and countermeasures[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(10): 1945-1956. (in Chinese))
[2]	葛伟凤, 张飞, 陈勉, 等. 盐膏岩DRA-Kaiser地应力测试方法初探[J]. 岩石力学与工程学报, 2015, 34(增刊1): 3138-3142. (GE Wei-feng, ZHANG Fei, CHEN Mian, et al.Research on geostress measurement using DRA-Kaiser method in salt-gypsum formation[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(S1): 3138-3142. (in Chinese))
[3]	卢兴宇. 关于Kaiser效应和应力方向的初步探讨[J]. 重庆建筑工程学院院报, 1987(3): 83-91. (LU Xing-yu.Preliminary discussion on the Kaiser effect and the stress orientation[J]. Chongqing; Journal of College of Civil Engineering, 1987(3): 45-46. (in Chinese))
[4]	MIHIHIRO K.Rock at great depth[M]. Rotterdam: Balkema, 1989, 2: 1025-1032.
[5]	STUART C E, MEREDITH P G, MURRELL S A F, et al. Anisotropic crack damage and stress-memory effect in rocks under triaxial loading[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 1993, 30: 937-941.
[6]	HSIEHA A, DIGHTA P, DYSKIN A V.The rock stress memory unrecoverable by the Kaiser effect method[J]. International Journal of Rock Mechanics and Mining Sciences, 2015, 75:190-195.
[7]	HOLCOMB D J, COSTIN L S.Detecting damage surfaces in brittle materials using acoustic emissions[J]. Journal of Applied Mechanics, 1986, 53(3): 536-544.
[8]	LAVROV A, VERVOOTR A, WEVERS M, et al.Experimental and numerical study of the Kaiser effect in cyclic Brazilian tests with disk rotation[J]. International Journal of Rock Mechanics and Mining Sciences, 2002, 39(3): 287-302.
[9]	阎南. 岩石Kaiser 效应方向独立性研究[D]. 昆明: 昆明理工大学, 2008. (YAN Nan.Research on direction independence of rock Kaiser effect[D]. Kunming: Kunming University of Science and Technology, 2008. (in Chinese))
[10]	谢强, 邱鹏, 余贤斌, 等. 利用声发射法和变形率变化法联合测定地应力[J]. 煤炭学报, 2010, 35(4): 559-564. (XIE Qiang, QIU Ze, YU Xian-bin, et al.Initial stress measurements with AE and DRA combined technique[J]. Journal of China Coal Society, 2010, 35(4): 559-564. (in Chinese))
[11]	谢强, 唐家辉, 鲁鲲鹏, 等. 受不同加载偏转角影响的含裂纹砂岩劈裂声发射试验研究[J]. 岩土工程学报, 2018, 40(10): 1862-1870. (XIE Qiang, TANG Jia-hui, LU Kun-peng, et al.Acoustic emission characteristics of cracked sandstones affected by different rotating angles of loading under splitting test[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(10): 1862-1870. (in Chinese))
[12]	傅翔, 谢强, 江小城. 受拉加载方向变化对Kaiser效应点准确度的影响[J]. 岩土工程学报, 2014, 36(7): 1365-1370. (FU Xiang, XIE Qiang, JIANG Xiao-cheng.Effects of tensile loading direction on the accuracy of Kaiser effect point determination[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(7): 1365-1370. (in Chinese))
[13]	张大伦. 确定岩石中先存应力状态的声发射法[J]. 地震地质, 1984, 31(2): 121-127. (ZHANG Da-lun.Use of Acoustic emission method for estimation of preexisting stresses in the rock[J]. Seismology and Geology, 1984, 31(2): 121-127. (in Chinese))
[14]	LEHTONEN A, COSGROVE J W, HUDSON J A, et al.An examination of in situ rock stress estimation using the Kaiser effect[J]. Engineering Geology, 2012, 124(1): 24-37.
[15]	彭瑞, 孟祥瑞, 赵光明, 等. 不同岩性岩石声发射地应力测试及其应用[J]. 中南大学学报(自然科学版), 2015, 46(9): 3377-3384. (PENG Rui, MENG Xiang-rui, ZHAO Guang-ming, et al.Acoustic emission in-situ stress testing of different lithology rock and its application[J]. Journal of Central South University (Science and Technology), 2015, 46(9): 3377-3384. (in Chinese))
[16]	张东明, 白鑫, 齐消寒, 等. 含层理岩石的AE特征分析及基于Kaiser效应的地应力测试研究[J]. 岩石力学与工程学报, 2016, 35(1): 87-97. (ZHANG Dong-ming, BAI Xin, QI Xiao-han, et al.Acoustic emission characteristics and in-situ stresses of bedding rock based on Kaiser effect[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(1): 87-97. (in Chinese))
[17]	赵奎, 余彬, 李期森, 等. 大理岩声发射Kaiser效应法测量原岩应力试验研究[J].有色金属科学与工程, 2017, 8(3): 88-93. (ZHAO Kui, YU Bin, LI Qi-shen, et al.Experimental study on in-situ stress measurement from marble using the acoustic emission method[J]. Nonferrous Metals Science and Engineering, 2017, 8(3): 88-93. (in Chinese))
[18]	石凯, 梅甫定, 程明胜, 等. 循环加载高应力对大理岩Kaiser效应影响的试验研究[J]. 岩石力学与工程学报, 2017, 36(12): 2906-2916. (SHI Kai, MEI Fu-ding, CHENG Ming-sheng, et al.Experimental study on the effect of high stress of cycle loading on Kaiser effect in marble[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(12): 2906-2916. (in Chinese))
[19]	方亚如. 岩石声发射Kaiser 效应的方向独立性[J]. 地震地磁观测与研究, 1986, 7(2): 22-28. (FANG Ya-ru.Research on direction independence of rock Kaiser effect[J]. Seismological and Geomagnetic Observation and Research, 1986, 7(2): 22-28. (in Chinese))
[20]	黄润秋, 王士天. 用Kaiser 效应测试地应力的新认识[C]// 全国第三届岩土工程地质大会论文集, 1988, 中国: 56-60. (HUANG Run-qiu, WANG Shi-tian. The new understanding of using the Kaiser effect to test the crustal stres[C]// The 3rd Conference of Geo-Engineering, 1988, China: 56-60. (in Chinese))
[21]	邓荣贵, 付小敏. 用Kaiser 效应测定地应力的几个问题探讨[C]// 第二届全国岩石动力学学术会议, 1990, 宜昌: 221-225. (DENG Rong-gui, FU Xiao-min. Discussions on some problems for measuring geostress using Kaiser effect[C]// Proceedings of 2nd National Academic Conference on Rock Dynamic Mechanics, 1990, Yichang: 221-225. (in Chinese))
[22]	LAVROV A.The Kaiser effect in rocks: principles and stress estimation techniques[J]. International Journal of Rock Mechanics and Mining Sciences, 2003, 40(2): 151-171.
[23]	李庶林, 唐海燕. 不同加载条件下岩石材料破裂过程的声发射特性研究[J]. 岩土工程学报, 2010, 32(1): 47-52. (LI Shu-lin, TANG Hai-yan.Acoustic emission characteristics in failure process of rock under different uniaxial compressive loads[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(1): 47-52. (in Chinese))