巷道开挖应力旋转路径下弱胶结软岩剪应力–应变及非共轴特性研究

doi:10.13722/j.cnki.jrme.2023.0605

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (5380 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract To investigate the evolution law of principal stress rotation path caused by tunnel excavation and the resulting deformation in rock masses，a numerical model has been developed to explore the evolution of principal stress rotation paths and resultant rock mass deformations due to tunnel excavation，with a focus on weakly cemented soft rock tunnels. This model examines the changes in magnitude and direction of principal stresses surrounding the tunnel, induced by the excavation process. Parameters for loading states in excavation-disturbed rotational stress path experiments are determined through this investigation. Nine kinds of excavation disturbance stress rotation paths tests were conduct by using hollow torsional shear tests on weakly cemented soft rock. The spatial curve characteristics of shear stress-strain excavation distance law and non-coaxial angle variation in the stress(?z－?θ)-2τzθ plane was researched. Significant changes were observed in the magnitude and direction of principal stresses in the surrounding rock of the tunnel，including its floor，roof，and sidewalls，as excavation progressed. Particularly within the 2D range of the tunnel，strong stress rotation and abrupt stress magnitude changes occurred. Shear stress-strain curves at monitoring points in the surrounding rock，influenced by excavation disturbance stress，were observed to develop in patterns resembling V，Z or N shapes. Excavation disturbance in weakly cemented soft rock induced principal stress rotation，resulting in a non-coaxial angle between strain increment and stress directions. The non-coaxial angles peaked at 52.8°，－22.3° and 30.6° for the tunnel floor，roof and sidewalls，respectively，influenced by stress path variations. This research results light on the non-coaxial plastic deformation in rock masses，a result of principal stress rotation from tunnel excavation. The design level and disaster prevention capability of underground engineering are enhanced.

Key words： mining engineering rock mass mechanics excavation disturbance principal stress value principal stress direction non-coaxial angle

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LIU Jiashun1
	2
	ZHU Kaixin1
	ZUO Jianping2
	WANG Laigui3
	SHENG Yantao1
	SUN Kaiyang1

Cite this article:

LIU Jiashun1,2,ZHU Kaixin1, et al. The shear stress strain characteristics of weakly cemented soft rock under roadway excavation stress path and its non-coaxial characteristics[J]. , 2024, 43(4): 934-950.

URL:

http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0605 OR http://rockmech.whrsm.ac.cn/EN/Y2024/V43/I4/934

[4]	宋朝阳. 弱胶结砂岩细观结构特征与变形破坏机制研究及应用[博士学位论文][D]. 北京：北京科技大学，2017.(SONG Chaoyang. Research on fine structure characteristics and deformation and failure mechanism of weakly cemented sandstone and application[Ph. D. Thesis][D]. Beijing：Beijing University of Technology，2017.(in Chinese))
[17]	谢和平. 深部岩体力学与开采理论研究进展[J]. 煤炭学报，2019，44(5)：1 283-1 305.(XIE Heping. Research progress on mechanics and mining theory of deep rock mass[J]. Journal of China Coal Society，2019，44(5)：1 283-1 305.(in Chinese))
[3]	孟庆彬，王杰，韩立军，等. 极弱胶结岩石物理力学特性及本构模型研究[J]. 岩土力学，2020，41(增1)：1-11.(MENG Qingbin，WANG Jie，HAN Lijun，et al. Physical mechanics characteristics and constitutive model research on extremely weak cementation rock[J]. Rock and Soil Mechanics，2020，41(Supp.1)：1-11.(in Chinese))
[7]	孟庆彬，孙稳，韩立军，等. 深井软岩巷道群掘进扰动效应与控制技术研究[J]. 采矿与安全工程学报，2021，38(3)：496-506.(MENG Qingbin，SUN Wen，HAN Lijun，et al. Disturbing effect of excavation in deep soft rock roadways and control technology[J]. Journal of Mining and Safety Engineering，2021，38(3)：496-506.(in Chinese))
[9]	李建贺，盛谦，朱泽奇，等. Mine-by实验洞开采过程中围岩应力路径与破坏模式分析[J]. 岩石力学与工程学报，2017，36(4)：821-830.(LI Jianhe，SHENG Qian，ZHU Zeqi，et al. Analysis of stress path and failure mode of surrounding rock during mining of mine-by experimental cave[J]. Chinese Journal of Rock Mechanics And Engineering，2017，36(4)：821-830.(in Chinese))
[10]	EBERHARDT E. Numerical modelling of three-dimension stress rotation ahead of an advancing tunnel face[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(4)：499-518.
[13]	左建平，孙运江，文金浩，等. 深部巷道全空间协同控制技术及应用[J]. 清华大学学报：自然科学版，2021，61(8)：853-862.(ZUO Jianping，SUN Yunjiang，WEN Jinhao，et al. Full-space collaborative control technology and its application for deeply buried roadways[J]. Journal of Tsinghua University：Science and Technology，2021，61(8)：853-862.(in Chinese))
[14]	曾酉源. 深埋洞室围岩破裂区时空分布特征研究[硕士学位论文][D]. 重庆：重庆大学，2015.(ZENG Youyuan. Study on spatial and temporal distribution characteristics of fracture zone in surrounding rock of deep cavern[M. S. Thesis][D]. Chongqing：Chongqing University，2015.(in Chinese))
[19]	端宁. 深部开采扰动诱发围岩应力场及能量场演化规律研究[硕士学位论文][D]. 徐州：中国矿业大学，2016.(DUAN Ning. Study on surrounding rock stress field and energy field evolution law induced by deep mining disturbance[M. S. Thesis][D]. Xuzhou：China University of Mining and Technology，2016.(in Chinese))
[20]	卢志国，鞠文君，赵毅鑫，等. 采动诱发应力主轴偏转对断层稳定性影响分析[J]. 岩土力学，2019，40(11)：4 459-4 466.(LU Zhiguo，JU Wenjun，Zhao Yixin，et al. Influence analysis of mining-induced stress spindle deflection on fault stability[J]. Rock and Soil Mechanics，2019，40(11)：4 459-4 466.(in Chinese))
[24]	何团，黄志增，李春睿，等. 特厚煤层综放工作面侧向煤体应力时空演化特征[J]. 采矿与安全工程学报，2018，35(1)：100-105.(HE Tuan，HUANG Zhizeng，LI Chunrui，et al. Temporal and spatial evolution characteristics of lateral coal stress in fully mechanized top coal caving mining working face in ultra-thick coal seam[J]. Journal of Mining and Safety Engineering，2018，35(1)：100-105.(in Chinese))
[27]	QIAN J G，DU Z B，YIN Z Y. Cyclic degradation and non-coaxiality of soft clay subjected to pure rotation of principal stress directions[J]. Acta Geotechnica，2017，11(7)：567-574.
[29]	GUTIERREZ M，ISHIHARA K，TOWHATA I. Flow theory for sand during rotation of principal stress direction[J]. Soils and Foundation，1991，31(4)：121-132.
[30]	DU Z B，SHI Z H，QIAN J G，et al. Constitutive modeling of three-dimensional non-coaxial characteristics of clay[J]. Acta Geotechnica，2022，17(6)：2 157-2 172.
[2]	刘家顺，靖洪文，孟波，等. 含水条件下弱胶结软岩蠕变特性及分数阶蠕变模型研究[J]. 岩土力学，2020，41(8)：2 609-2 618.(LIU Jiashun，JING Hongwen，MENG Bo，et al. Research on the effect of moisture content on the creep behavior of weakly cemented soft rock and its fractional-order model[J]. Rock and Soil Mechanics，2020，41(8)：2 609-2 618.(in Chinese))
[12]	左建平，魏旭，王军，等. 深部巷道围岩梯度破坏机制及模型研究[J]. 中国矿业大学学报，2018，47(3)：478-485.(ZUO Jianping，WEI Xu，WANG Jun，et al. Investigation of failure mechanism and model for rocks in deep roadway under stress gradient effect.[J]. Journal of China University of Mining and Technology，2018，47(3)：478-485.(in Chinese))
[22]	王兆会，孙文超，水艳婷，等. 千米深井超长工作面采动应力旋转轨迹及其推进方向效应[J]. 煤炭学报，2022，47(2)：634-650.(WANG Zhaohui，SUN Wenchao，SHUI Yanting，et al. Rotation trajectory and advance direction effect of mining stress in 1 000-meter-deep ultra-long working face[J]. Journal of China Coal Society，2022，47(2)：634-650.(in Chinese))
[8]	KAISER P K，YAZICI S，MALONEY S. Mining induced stress change and consequences of stress path on excavation stability：A case study[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(2)：167-180.
[18]	陈景涛，冯夏庭. 高地应力下岩体的真三轴试验研究[J]. 岩石力学与工程学报，2006，25(8)：1 537-1 543.(CHEN Jingtao，FENG Xiating. True triaxial test of rock mass under high in-situ stress[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(8)：1 537-1 543.(in Chinese))
[28]	YUAN R，YU H S，HU N，et al. Non-coaxial soil model with an anisotropic yield criterion and its application to the analysis of strip footing problems[J]. Computers and Geotechnics，2018，(99)：80-92.
[1]	王海宁. 中国煤炭资源分布特征及其基础性作用新思考[J]. 中国煤炭地质，2018，30(7)：5-9.(WANG Haining. New thoughts on the distribution characteristics and basic functions of coal resources in China[J]. Coal geology of China，2018，30(7)：5-9.(in Chinese))
[11]	DIEDERICHS M S，KAISER P K，EBERHARDT E. Damage initiation and propagation in hard rock during tunneling and the influence of near-face stress rotation[J]. International Journal of Rocks Mechanics and Mining Sciences，2004，41(5)：785-812.
[21]	庞义辉，王国法，李冰冰. 深部采场覆岩应力路径效应与失稳过程分析[J]. 岩石力学与工程学报，2020，39(4)：682-694.(PANG Yihui，WANG Guofa，LI Bingbing. Analysis of stress path effect and instability process of overburden in deep stope[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(4)：682-694.(in Chinese))
[6]	赵增辉，马庆，高晓杰，等. 弱胶结软岩巷道围岩非协同变形及灾变机制[J]. 岩石力学与工程学报，2019，38(2)：272-279.(ZHAO Zenghui，MA Qing，GAO Xiaojie，et al. Nonsynchronous deformation and disasters mechanism of weakly cemented soft rock surrounding rock in roadway[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(2)：272-279.(in Chinese))
[16]	CHEN D D，JI C W，XIE S R，et al. Deviatoric stress evolution laws and control in surrounding rock of soft coal and soft roof roadway under intense mining conditions[J]. Advances in Materials Science and Engineering，2020，(10)：1-18.
[26]	刘伟韬，申建军，贾红果. 深井底板采动应力演化规律与破坏特征研究[J]. 采矿与安全工程学报，2016，33(6)：1 045-1 051.(LIU Weitao，SHEN Jianjun，JIA Hongguo. Mining-induced stress evolution law and failure characteristics of floor in deep mine[J]. Journal of Mining and Safety Engineering，2016，33(6)：1 045-1 051.(in Chinese))
[5]	王刚，蒋宇静，李为腾，等. 弱胶结软岩大变形破坏控制理论与技术[M]. 北京：科学出版社，2017：11-13.(WANG Gang，JIANG Yujing，LI Weiteng，et al. Theory and technique of large deformation and failure control of weakly cemented soft rock[M]. Beijing：Science Press，2017：11-13.(in Chinese))
[15]	朱训国，陈卓立，赵德深. 深部隧洞围岩分区破裂应力/应变分析及其破裂机制探讨[J]. 西安理工大学学报，2017，33(4)：402-407.(ZHU Xunguo，CHEN Zhuoli，ZHAO Deshen. Zonal fracture stress/strain analysis and fracture mechanism of deep tunnel surrounding rock[J]. Journal of Xi?an University of Technology，2017，33(4)：402-407.(in Chinese))
[25]	张雷，李研，屠世浩，等. 深部煤层分叉合并区采动应力演化机制及控制技术[J]. 采矿与安全工程学报，2022，39(4)：702-710.(ZHANG Lei，LI Yan，TU Shihao，et al. Evolution mechanism and control technology of mining-induced stress in the bifurcation and merging area of deep coal seam[J]. Journal of Mining and Safety Engineering，2022，39(4)：702-710.(in Chinese))
[23]	罗生虎，王同，伍永平，等. 大倾角煤层长壁开采围岩应力传递路径时空演化特征[J]. 煤炭学报，2022，47(7)：2 534-2 545.(LUO Shenghu，WANG Tong，WU Yongping，et al. Temporal and spatial evolution characteristics of stress transfer path in surrounding rock of longwall mining in large dip coal seam[J]. Journal of China Coal Society，2022，47(7)：2 534-2 545.(in Chinese))