不同应力水平与初始水化损伤下软岩锚固剂耦合结构剪切力学特性

doi:10.13722/j.cnki.jrme.2023.1257

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

Download: PDF (5638 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In this research，triaxial shear tests under different stress levels and initial hydration damages were carried out on sandstone-grout composite specimens under different normal stresses and immersion times to investigate the shear mechanical properties of rock-grout composite structures. The results showed that the increased damage induced by hydration significantly reduced the shear resistances of the rock and the bonding surface, increased the deformation amount of the specimen and degraded its bearing capacity. The shear strength of the specimens decreased by 23.14%–35.46% under the condition of 30 d of immersion，while maintaining the same normal stress level. The increase of normal stress restricted the development of micro-fractures in the specimen and improved the bearing ability. The shear strength of the specimens increased by 97.15%–137.12% with increasing normal stress，while maintaining the same immersion time. The shear failure mode of the composite specimens is limited by the stress level and initial hydration damage. There were three typical failure modes, including shear slip along the rock-grout interface，mixed shear failure and partial rock failure. With increasing immersion time，the total strain energy，the elastic strain energy and the dissipated strain energy of the specimen decreased，and the energy required for specimen failure reduced. The dissipation ratio of the specimens decreased by 54.38%–57.56% with increasing normal stress at the same immersion time. The increase of normal stress raised the energy storage capacity in the specimen，as well as the input external energy required for fracture development，thus enhancing the bearing performance of the structure. According to the shear mechanical behaviors of the composite specimens，a shear model of soft rock-grout structures under different immersion times and normal stresses was established.

Key words： rock mechanics stress level soft rock rock-grout composite structure triaxial shear test energy evolution

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	RONG Haoyu1
	2
	LI Guichen3
	ZHAO Guangming4
	XU Jiahui3
	LIANG Dongxu5

Cite this article:

RONG Haoyu1,2,LI Guichen3, et al. Shear mechanical properties of soft rock-grout structures under different stress levels and initial hydration damage conditions[J]. , 2024, 43(8): 1936-1951.

URL:

http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.1257 OR http://rockmech.whrsm.ac.cn/EN/Y2024/V43/I8/1936

[3]	何满潮. 深部建井力学研究进展[J]. 煤炭学报，2021，46(3)：726-746.(HE Manchao. Research progress of deep shaft construction mechanics[J]. Journal of China Coal Society，2021，46(3)：726-746.(in Chinese))
[31]	ITASCA. PFC3D(particle flow code in three dimensions) version 5.0：Theory and background[M]. Minneapolis：Itasca Consulting Group，2016.
[36]	GOODMAN R E. Methods of geological engineering in discontinuous rocks[M]. New York：West Group，1976：125-173.
[5]	李桂臣，李菁华，孙元田，等. 泥岩多尺度模型与水岩作用特性研究进展[J]. 煤炭学报，2022，47(3)：1 138-1 154.(LI Guichen，LI Jinghua，SUN Yuantian，et al. Advance of multi-scale study on both analytic models and water-rock interaction characteristics of mudstone[J]. Journal of China Coal Society，2022，47(3)：1 138- 1 154.(in Chinese))
[7]	LI G，JIANG Z，LV C，et al. Instability mechanism and control technology of soft rock roadway affected by mining and high confined water[J]. International Journal of Mining Science and Technology，2015，25(4)：573-580.
[9]	姚强岭，李学华，陈庆峰. 含水砂岩顶板巷道失稳破坏特征及分类研究[J]. 中国矿业大学学报，2013，42(1)：50-56.(YAO Qiangling，LI Xuehua，CHEN Qingfeng. Research on the characteristics and classification of water-enriched sandstone roofs[J]. Journal of China University of Mining and Technology，2013，42(1)：50-56.(in Chinese))
[10]	BIAN X，CUI Y，ZENG L，et al. Swelling behavior of compacted bentonite with the presence of rock fracture[J]. Engineering Geology，2019，254：25-33.
[13]	康红普，王国法，姜鹏飞，等. 煤矿千米深井围岩控制及智能开采技术构想[J]. 煤炭学报，2018，43(7)：1 789-1 800.(KANG Hongpu，WANG Guofa，JIANG Pengfei，et al. Conception for strata control and intelligent mining technology in deep coal mines with depth more than 1 000 m[J]. Journal of China Coal Society，2018，43(7)：1 789- 1 800.(in Chinese))
[1]	何满潮，景海河，孙晓明. 软岩工程地质力学研究进展[J]. 工程地质学报，2000，8(1)：46-62.(HE Manchao，JING Haihe，SUN Xiaoming. Research progress of soft rock engineering geomechanics in china coal mine[J]. Journal of Engineering Geology，2000，8(1)：46-62.(in Chinese))
[8]	LI G，JIANG Z，FENG X，et al. Relation between molecular structure of smectite and liquefaction of mudstone[J]. Rsc Advances，2015，5(30)：23 481-23 488.
[11]	王羽扬，刘勇，王沉，等. 深井软岩巷道底鼓变形破坏机理及控制技术[J]. 地下空间与工程学报，2021，17(增1)：411-418. (WANG Yuyang，LIU Yong，WANG Chen，et al. Mechanics of bottom bulge and control technology in deep mine soft rock roadway[J]. Chinese Journal of Underground Space and Engineering，2021，17(Supp.1)：411-418.(in Chinese))
[15]	康红普. 我国煤矿巷道围岩控制技术发展70年及展望[J]. 岩石力学与工程学报，2021，40(1)：1-30.(KANG Hongpu. Seventy years development and prospects of strata control technologies for coal mine roadways in China[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(1)：1-30.(in Chinese))
[17]	WINDSOR C R. Rock reinforcement systems[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(6)：919-951.
[18]	何富连，严红，杨绿刚，等. 淋水碎裂顶板煤巷锚固试验研究与实践[J]. 岩土力学，2011，32(9)：2 591-2 595.(HE Fulian，YAN Hong，YANG Lvgang，et al. Anchorage experimental research on a coal roadway with water spraying and broken roof and its application[J]. Rock and Soil Mechanics，2011，32(9)：2 591-2 595.(in Chinese))
[20]	荣浩宇，王伟，李桂臣，等. 岩石-锚固剂结构水化失稳微观力学特性[J]. 岩土力学，2023，44(3)：784-798.(RONG Haoyu，WANG Wei，LI Guichen，et al. Micromechanical characteristics of hydration instability of rock-anchorage agent structure[J]. Rock and Soil Mechanics，2023，44(3)：784-798.(in Chinese))
[21]	SAKAI T，NAKANO M. Effects of slaking and degree of compaction on the mechanical properties of mudstones with varying slaking properties[J]. Soils and Foundations，2019，59(1)：56-66.
[23]	张宗堂，高文华，张志敏，等. 基于Weibull分布的红砂岩颗粒崩解破碎演化规律[J]. 岩土力学，2020，41(3)：877-885.(ZHANG Zongtang，GAO Wenhua，ZHANG Zhiming，et al. Evolution of particle disintegration of red sandstone using Weibull distribution[J]. Rock and Soil Mechanics，2020，41(3)：877-885.(in Chinese))
[25]	梁东旭，张农，荣浩宇. 基于锚固剂环裂纹扩展的全长锚固脱黏失效机制研究[J]. 岩石力学与工程学报，2023，42(4)：948-963.(LIANG Dongxu，ZHANG Nong，RONG Haoyu. Study on the failure mechanism of full-length anchorage de-bonding based on anchor agent ring crack propagation[J]. Chinese Journal of Rock Mechanics and Engineering，2023，42(4)：948-963.(in Chinese))
[28]	AZIZ N. A new technique to determine the load transfer capacity of resin anchored bolts[C]// 3rd Australian Coal Operators Conference. Wollongong：[s. n.]，2002：176-185.
[30]	DING X，ZHANG L，ZHU H，et al. Effect of model scale and particle size distribution on PFC3D simulation results[J]. Rock Mechanics and Rock Engineering，2014，47(6)：2 139-2 156.
[33]	丛怡，丛宇，张黎明，等. 大理岩加、卸荷破坏过程的三维颗粒流模拟[J]. 岩土力学. 2019，40(3)：1 179-1 186.(CONG Yi，CONG Yu，ZHANG Liming，et al. 3D particle flow simulation of loading-unloading failure process of marble[J]. Rock and Soil Mechanics，2019，40(3)：1 179-1 186.(in Chinese))
[35]	DUAN X，WANG W，LIU S，et al. Experimental investigation on mechanical behavior，energy evolution and gas permeability of anisotropic phyllite subjected to triaxial compression and cyclic loading[J]. Geomechanics for Energy and the Environment，2023，35：15.
[6]	LIU Z，ZHOU C，LI B，et al. Effects of grain dissolution-diffusion sliding and hydro-mechanical interaction on the creep deformation of soft rocks[J]. Acta Geotechnica，2020，15(5)：1 219-1 229.
[16]	LI D，LI Y，ZHU W. Analytical modelling of load-displacement performance of cable bolts incorporating cracking propagation[J]. Rock Mechanics and Rock Engineering，2020，53(8)：3 471-3 483.
[26]	孟庆彬，钱唯，韩立军，等. 极软弱地层双层锚固平衡拱结构形成机制研究[J]. 采矿与安全工程学报，2019，36(4)：650-659. (MENG Qingbin，QIAN Wei，HAN Lijun，et al. Formation mechanism of arch structure balanced by double-layer anchor in extremely weak strata[J]. Journal of Mining and Safety Engineering，2019，36(4)：650-659.(in Chinese))
[4]	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 review of the state key research development program of China：Deep rock mechanics and mining theory[J]. Journal of China Coal Society，2019，44(5)：1 283-1 305.(in Chinese))
[14]	侯朝炯. 深部巷道围岩控制的关键技术研究[J]. 中国矿业大学学报，2017，46(5)：970-978.(HOU Chaojong. Key technologies for surrounding rock control in deep roadway[J]. Journal of China University of Mining and Technology，2017，46(5)：970-978.(in Chinese))
[24]	张玉芳，袁坤，张彩亮，等. 多次分段控制注浆斜向预应力钢锚管锚固机制研究[J]. 岩石力学与工程学报，2020，39(7)：1 297- 1 310.(ZHANG Yufang，YUAN Kun，ZHANG Cailiang，et al. Study on anchoring mechanisms of inclined prestressed steel anchor pipes controlled by multi-stage grouting[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(7)：1 297-1 310.(in Chinese))
[34]	谢和平，鞠杨，黎立云. 基于能量耗散与释放原理的岩石强度与整体破坏准则[J]. 岩石力学与工程学报，2005，24(17)：3 003- 3 010.(XIE Heping，JU Yang，LI Liyun. Criteria for strength and structural failure of rocks based on energy dissipation and energy release principles[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 003-3 010.(in Chinese))
[2]	康永水，耿志，刘泉声，等. 我国软岩大变形灾害控制技术与方法研究进展[J]. 岩土力学，2022，43(8)：2 035-2 059.(KANG Yongshui，GENG Zhi，LIU Quansheng，et al. Research progress on support technology and methods for soft rock with large deformation hazards in China[J]. Rock and Soil Mechanics，2022，43(8)：2 035-2 059.(in Chinese))
[12]	单仁亮，彭杨皓，孔祥松，等. 国内外煤巷支护技术研究进展[J]. 岩石力学与工程学报，2019，38(12)：2 377-2 403.(SHAN Renliang，PENG Yanghao，KONG Xiangsong，et al. Research progress of coal roadway support technology at home and abroad[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(12)：2 377-2 403.(in Chinese))
[22]	李国维，巩齐齐，李涛，等. 崩解性砂软岩改良弱膨胀土性状实验研究[J]. 工程地质学报，2021，29(1)：34-43.(LI Guowei，GONG Qiqi，LI Tao，et al. Experimental study on properties of weak expansive soil improved by disintegrated sandstone[J]. Journal of Engineering Geology，2021，29(1)：34-43.(in Chinese))
[32]	HUANG Y，YANG S，RANJITH P，et al. Strength failure behavior and crack evolution mechanism of granite containing pre-existing non-coplanar holes：Experimental study and particle flow modeling[J]. Computers and Geotechnics，2017，88：182-198.
[19]	冯晓巍. 全长锚固系统失效机制及耐久性探究[博士学位论文][D]. 徐州：中国矿业大学，2017.(FENG Xiaowei. Failure mechanism and durability exploration for fully bonded bolting system[Ph. D. Thesis][D]. Xuzhou：China University of Mining and Technology，2017.(in Chinese))
[29]	HYETT A J，BAWDEN W F，MACSPORRAN G R，et al. Constitutive law for bond failure of fully-grouted cable bolts using a modified Hoek cell[J]. International Journal of Rock Mechanics and Mining Science and Geomechanics Abstracts，1995，32(1)：11.
[27]	姚前元，何凤，刘文华. 岩石物理力学性质试验规程第2部分：岩石含水率试验[M]. 北京：中华人民共和国国土资源部，2015. (YAO Qianyuan，HE Feng，LIU Wenhua. Regulation for testing the physical and mechanical properties of rock-Part 2：Test for determining the water content of rock[M]. Beijng：Ministry of Land and Resources of the People?s Republic of China，2015.(in Chinese))