贯通型标准JRC双节理剪切力学及声发射特性研究

王刚; 刘廷方; 王长盛; 蒋宇静; 王鹏举; 张书博; 肖智勇

doi:10.11779/CJGE20221395

贯通型标准JRC双节理剪切力学及声发射特性研究 English Version

王刚^{1, 2,},
刘廷方¹,
王长盛^{1, 3, ,},
蒋宇静^{3, 4},
王鹏举¹,
张书博¹,
肖智勇¹

1.
山东科技大学山东省土木工程防灾减灾重点实验室, 山东青岛 266590
2.
福建工程学院土木工程学院, 福建福州 350118
3.
长崎大学工学研究科, 日本长崎 852-8521
4.
山东科技大学能源与矿业工程学院, 山东青岛 266590

基金项目:

国家自然科学基金项目 52079077

国家自然科学基金项目 52209141

山东省自然科学基金青年项目 ZR2021QE069

山东省高等学校青创团队项目 2022KJ214

详细信息

作者简介:
王刚(1976—)，男，教授，博士生导师，主要从事裂隙岩体剪切和地下工程支护等方面的研究。E-mail: wanggang1110@gmail.com

通讯作者:
王长盛, E-mail: cswang0635@163.com

中图分类号: TU452
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出版历程
- 收稿日期: 2022-11-09
- 网络出版日期: 2023-04-17
- 刊出日期: 2024-02-29

Shear mechanics and acoustic emission characteristics of penetrating standard JRC double joints

1.
Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, China
2.
College of Civil Engineering, Fujian Institute of Engineering, Fuzhou 350118, China
3.
Graduate School of Engineering, Nagasaki University, Nagasaki 852-8521, Japan
4.
College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China

摘要

摘要: 节理岩体的抗剪性能是影响工程岩体强度及稳定性的关键因素。基于3D打印技术制作标准JRC节理面模具和固定夹板，采取一体化浇筑方式制备不同节理面间距和不同粗糙度的双节理试样，结合声发射（acoustic emission，AE）技术探究不同法向应力条件下粗糙双节理岩体剪切力学特性和破坏演化特征。结果表明：剪切应力-剪切位移曲线形态受节理粗糙度和法向应力共同影响。随JRC和法向应力的增加，剪切应力软化程度加重；法向应力较大时，峰后阶段剪切应力存在多次突降现象，突降值随法向应力的增加而增大。峰值剪切强度出现在双节理间岩石夹层断裂时刻，随JRC和法向应力的增加呈增大趋势，随节理面间距增加呈减小趋势。AE结果表明：岩石夹层断裂时刻AE能量大幅突增，AE能量峰值稍滞后于剪切应力峰值，随法向应力的增加，AE能量峰值和累积AE能量值增大；AE定位点空间上集中于岩石夹层部分，时间上频发于200~600 s内，随节理面间距的增加，AE定位点的集中范围扩大。
- 岩石力学 /
- 双节理 /
- 直剪试验 /
- 节理面间距 /
- JRC /
- 声发射
Abstract: The anti-shear performance of rock joints is a significant factor that affects the strength and stability of engineering rock mass. In this study, the standard joint surface mold and fixed splints are produced based on the 3D printing technology, and the double-joint specimens with different joint spacings and roughnesses are prepared by adopting the integrated pouring method, and then the acoustic emission technology is combined to explore the shear mechanical properties and failure evolution characteristics of the rough double-joint rock mass under different normal stress conditions. The results indicate that the patterns of shear stress displacement curves are affected by the joint roughness and normal stress. With the increase of the JRC and normal stress, the degree of softening of the shear stress increases; when the normal stress is larger, there are multiple sudden drops in the shear stress at the post-peak stage, and the sudden descending value increases with the normal stress. The peak shear intensity appeares at the fracture of the rock sandwich between two joints, showing an increasing trend with the increase of the JRC and normal stress and decreasing with the increase of the joint spacing. The AE results show that the AE energy increases sharply at the fracture moment of the interlayer, and the peak value of AE energy slightly lags behind the peak value of shear stress. With the increase of the normal stress, the peak value of AE energy and the cumulative AE energy value increase. The AE positioning points are concentrated in the rock interlayer, occurring frequently within the range of 200~600 s, and with the increase of the joint spacing, the concentration range of the AE positioning point expands.
- rock mechanics /
- double joints /
- direct shear test /
- joint spacing /
- JRC /
- acoustic emission

HTML全文

图 1 浇筑模具及制样流程

Figure 1. Pouring mold and production process of specimens

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图 2 剪切-渗流耦合试验系统及监测设备

Figure 2. Shear-fluid coupled test system and monitoring equipment

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图 3 双节理试样剪切示意图

Figure 3. Schematic diagram of shear of double-joint specimen

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图 4 剪切应力-剪切位移变化规律曲线

Figure 4. Variation curves of shear stress-displacement

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图 5 峰值剪切强度随节理面间距变化规律

Figure 5. Variation of peak shear strength with joint spacing

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图 6 不同JRC双节理试样的峰值剪切强度

Figure 6. Peak shear strengths of double-joint specimens with different JRCs

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图 7 各因素作用下双节理试样破坏模式

Figure 7. Failure modes of double-joint specimens under various factors

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图 8 典型声发射波形及参数

Figure 8. Waveforms and parameters of typical acoustic emission

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图 9 剪切应力-AE能量演化示意图

Figure 9. Schematic diagram of shear stress-AE energy evolution

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图 10 各因素作用下双节理试样AE能量演化图

Figure 10. AE energy evolution of double-joint specimens under various factors

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图 11 AE三维定位结果演化图

Figure 11. Evolution of AE three-dimensional positioning results

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图 12 AE三维定位点数量及占比统计

Figure 12. AE three-dimensional positioning point quantity and proportion statistics

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表 1 贯通型标准JRC双节理剪切试验方案

Table 1 Schemes of penetrating standard JRC double-joint shear tests

节理面间距/mm	JRC			法向应力/ MPa
节理面间距/mm	4~6	10~12	16~18	法向应力/ MPa
10				2
10	J3-S10-2	J6-S10-2	J9-S10-2	2
10				4
10	J3-S10-4	J6-S10-4	J9-S10-4	4
10				6
10	J3-S10-6	J6-S10-6	J9-S10-6	6
20				2
20	J3-S20-2	J6-S20-2	J9-S20-2	2
20				4
20	J3-S20-4	J6-S20-4	J9-S20-4	4
20				6
20	J3-S20-6	J6-S20-6	J9-S20-6	6
30				2
30	J3-S30-2	J6-S30-2	J9-S30-2	2
30				4
30	J3-S30-4	J6-S30-4	J9-S30-4	4
30				6
30	J3-S30-6	J6-S30-6	J9-S30-6	6
注：以J3-S10-2为例，J3表示节理面选取第3条JRC曲线（JRC=4~6），S10表示节理面间距为10 mm，2表示法向应力为2 MPa。

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参考文献(24)

[1]	王刚, 蒋宇静, 李术才. 地下洞室围岩裂隙开裂判断方法及其应用[J]. 地下空间与工程学报, 2008, 4(4): 657-661. https://www.cnki.com.cn/Article/CJFDTOTAL-BASE200804013.htm WANG Gang, JIANG Yujing, LI Shucai. Crack expansion judgment method for wall rock of underground Caverns and its application[J]. Chinese Journal of Underground Space and Engineering, 2008, 4(4): 657-661. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BASE200804013.htm
[2]	WANG C S, LIU R C, JIANG Y J, et al. Effect of shear-induced contact area and aperture variations on nonlinear flow behaviors in fractal rock fractures[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2023, 15(2): 309-322. doi: 10.1016/j.jrmge.2022.04.014
[3]	刘溪鸽, 朱万成, 周靖人, 等. 双粗糙结构面剪切试验与数值模拟研究[J]. 岩石力学与工程学报, 2017, 36(增刊2): 3831-3840. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2017S2015.htm LIU Xige, ZHU Wancheng, ZHOU Jinren, et al. Direct shear tests and numerical simulation of double rough joints[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(S2): 3831-3840. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2017S2015.htm
[4]	LIU R C, HAN G S, JIANG Y J, et al. Shear behaviour of multi-joint specimens: role of surface roughness and spacing of joints[J]. Geotechnique Letters, 2020, 10(2): 113-1118. doi: 10.1680/jgele.19.00044
[5]	LIU X G, ZHU W C, YU Q L, et al. Estimation of the joint roughness coefficient of rock joints by consideration of two-order asperity and its application in double-joint shear tests[J]. Engineering Geology, 2017, 220: 243-255. doi: 10.1016/j.enggeo.2017.02.012
[6]	LIU J, WU J H, LI X S, et al. Numerical simulation on shear behavior of double rough parallel joints under constant normal stiffness boundary condition[J]. Frontiers in Earth Science, 2022, 9(2): 1405-1415.
[7]	CHIU C C, WANG T T, WENG M C, et al. Modeling the anisotropic behavior of jointed rock mass using a modified smooth-joint model[J]. International Journal Rock Mechanics and Mining Sciences, 2013, 62(2): 14-22.
[8]	JIANG M, JIANG T, CROSTA G B, et al. Modeling failure of jointed rock slope with two main joint sets using a novel DEM bond contact model[J]. Engineering Geology, 2015, 19(3): 79-96.
[9]	JAEGER J C. Shear failure of anisotropic rocks[J]. Geological Magazine, 1960, 97(1): 65-72. doi: 10.1017/S0016756800061100
[10]	ZHAO W, HUANG R, YAN M. Study on the deformation and failure modes of rock mass containing concentrated parallel joints with different spacing and number based on smooth joint model in PFC[J]. Arabian Journal of Geosciences, 2015, 8(10): 7887-7897. doi: 10.1007/s12517-015-1801-z
[11]	WANG C S, JIANG Y J, WANG G et al. Experimental investigation on the shear behavior of the bolt-grout interface under CNL and CNS conditions considering realistic bolt profiles[J]. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2022, 8(4): 1-23.
[12]	周辉, 孟凡震, 张传庆, 等. 结构面剪切过程中声发射特性的试验研究[J]. 岩石力学与工程学报, 2015, 34(增刊1): 2827-2836. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2015S1029.htm ZHOU Hui, MENG Fanzhen, ZHANG Chuanqing, et al. Experimental study of acoustic emission characteristic of discontinuity under shearing condition[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(S1): 2827-2836. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2015S1029.htm
[13]	MORADIAN Z A, BALLIVY G, RIVARD P, et al. Evaluating damage during shear tests of rock joints using acoustic emissions[J]. International Journal of Rock Mechanics and Mining Sciences, 2010, 47(4): 590-598. doi: 10.1016/j.ijrmms.2010.01.004
[14]	MENG F Z, WONG L N Y, ZHOU H. Asperity degradation characteristics of soft rock-like fractures under shearing based on acoustic emission monitoring[J]. Engineering Geology, 2020, 266(5): 105392.
[15]	WANG G, ZHANG Y Z, JIANG Y J, et al. Shear behaviour and acoustic emission characteristics of bolted rock joints with different roughnesses[J]. Rock Mechanics and Rock Engineering, 2018, 51(6): 1438-1439.
[16]	周小平, 张永兴. 大厂铜坑矿细脉带岩石结构面直剪实验中声发射特性研究[J]. 岩石力学与工程学报, 2002, 21(5): 724-727. doi: 10.3321/j.issn:1000-6915.2002.05.025 ZHOU Xiaoping, ZHANG Yongxing. Study on the property of acoustic emission straight shearing test of rock joint in Dachang Tongkeng Mine[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(5): 724-727. (in Chinese) doi: 10.3321/j.issn:1000-6915.2002.05.025
[17]	蒋宇静, 张孙豪, 栾恒杰, 等. 恒定法向刚度边界条件下锚固节理岩体剪切特性试验研究[J]. 岩石力学与工程学报, 2021, 40(4): 663-675. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX202104002.htm JIANG Yujing, ZHANG Sunhao, LUAN Hengjie, et al. Experimental study on shear characteristics of bolted rock joints under constant normal stiffness boundary conditions[J]. Chinese Journal of Rock Mechanics and Engineering, 2021, 40(4): 663-675. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX202104002.htm
[18]	BARTON N, CHOUBEY V. The shear strength of rock joints in theory and practice[J]. Rock mechanics, 1977, 10(1): 1-54.
[19]	王笑然, 王恩元, 刘晓斐, 等. 裂隙砂岩裂纹扩展声发射响应及速率效应研究[J]. 岩石力学与工程学报, 2018, 37(6): 1446-1458. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201806014.htm WANG Xiaoran, WANG Enyuan, LIU Xiaofei, et al. Macro-crack propagation process and corresponding AE behaviors of fractured sandstone under different loading rates[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(6): 1446-1458. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201806014.htm
[20]	BARTON N. Review of a new shear-strength criterion for rock joints[J]. Engineering Geology, 1973, 7(4): 287–332. doi: 10.1016/0013-7952(73)90013-6
[21]	GRASSELLI G. 3D Behaviour of bolted rock joints: experimental and numerical study[J]. International Journal of Rock Mechanics and Mining Sciences, 2004, 42(1): 13–24.
[22]	张传庆, 刘振江, 张春生, 等. 隐晶质玄武岩破裂演化及破坏特征试验研究[J]. 岩土力学, 2019, 40(7): 2487-2496. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201907003.htm ZHANG Chuanqing, LIU Zhenjiang, ZHANG Chunsheng, et al. Experimental study on rupture evolution and failure characteristics of aphanitic basalt[J]. Rock and Soil Mechanics, 2019, 40(7): 2487-2496. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201907003.htm
[23]	赵兴东, 刘建坡, 李元辉, 等. 岩石声发射定位技术及其实验验证[J]. 岩土工程学报, 2008, 30(10): 1472-1476. http://cge.nhri.cn/cn/article/id/13000 ZHAO Xingdong, LIU Jianpo, LI Yuanhui, et al. Experimental verification of rock locating technique with acoustic emission[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(10): 1472-1476. (in Chinese) http://cge.nhri.cn/cn/article/id/13000
[24]	刘培洵, 刘力强, 黄元敏, 等. 声发射定位的稳健算法[J]. 岩石力学与工程学报, 2009, 28(增刊1): 2760-2764. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2009S1028.htm LIU Peixun, LIU Liqiang, HUANG Yuanmin, et al. Robust arithmetic for acoustic emission location[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(S1): 2760-2764. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2009S1028.htm