充填体和围岩–充填体界面剪切特性对比试验研究

doi:10.13722/j.cnki.jrme.2021.0145

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1150 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要拱效应理论模型在剪切力学参数(黏聚力c和内摩擦角)的选取上采用了等效原则。为了区分剪切参数的选取对拱效应理论模型的影响，首先，采用三轴测试方法，开展常侧向约束条件下围岩–充填体界面的三轴剪切和充填体的三轴压缩试验。基于Mohr-Coulomb强度理论框架，对不同养护时间下充填体和围岩–充填体界面的剪切力学参数进行对比和量化分析。然后，利用电子扫描电镜(SEM)和热差异分析(TG/DTG)的分析手段，充分解释充填体和围岩–充填体界面剪切参数的差异性。最后，依据试验测试结果，对Terzaghi理论模型的工程应用进行讨论。研究表明，随侧向约束的增加，围岩–充填体界面的剪切位移–剪切应力曲线呈现出多峰值现象，且充填体的轴向应变–偏应力曲线呈现出明显的弹性强化阶段。充填体的剪切力学参数(cb，)要明显大于相应围岩–充填体界面的参数(ci，)。两者的黏聚力比值(cb/ci)相差了2.26～2.67倍，内摩擦角比值()相差了1.65～2.76倍。且采用围岩–充填体界面的剪切参数(ci，)进行充填采场竖向应力()的预估能有效地克服Terzaghi理论模型的局限性。研究结论可为充填采场拱效应的预估和数值分析中力学参数的选取提供一定的参考。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	修占国
	王述红
	王斐笠
	任凤玉
	NGUYEN Vantuan

关键词 ：采矿工程, 膏体充填体, 围岩&ndash, 充填体界面, 三轴试验, 剪切力学参数, Terzaghi理论模型

Abstract：The equivalent method of shear mechanical parameters(cohesion c and internal friction angle) is used in the arching theoretical model. To investigate the influences of different shear mechanical parameters on the arching theoretical model，the triaxial tests under constant confining pressures were firstly carried out to study the shear behaviors of the surrounding rock-CPB(cemented paste backfill) interface and the triaxial compression behaviors of the CPB. Based on the framework of Mohr-Coulomb strength theory，the shear mechanical parameters of the CPB and the surrounding rock-CPB interface were compared and analyzed under different curing times. Then，The scanning electron microscopy(SEM) and the thermal differential analysis(TG/DTG) methods were used to explain the difference in the shear behaviors of the CPB and the surrounding rock-CPB interface. Finally，based on the experimental results，the engineering application of Terzaghi's theoretical model was also discussed. The results show that with increasing the confining pressure，the shear displacement-shear stress curves of the surrounding rock-CPB interface present a multi-peak phenomenon and the axial strain-deviatoric stress curves of the CPB show an obvious elastic strengthening stage. The shear mechanical parameters(cb and ) of the CPB are significantly larger than the corresponding parameters(ci and ) of the corresponding surrounding rock-CPB interface. The ratio of the cohesion(cb/ci) between the two types(CPB and surrounding rock-CPB interface) is 2.26 to 2.67 times，and 1.65 to 2.76 times for the corresponding ratio of the internal friction angle(). Moreover，using the shear parameters(ci，) of the surrounding rock-CPB interface to predict the vertical stress() inside the CPB structure can effectively overcome the limitations of the Terzaghi¢s theoretical model. The conclusions can provide a reference for the prediction of the arching effect of the CPB structure and the selection of mechanical parameters in the numerical analysis.

Key words： mining engineering')" href="#">

mining engineering cemented paste backfill(CPB) surrounding rock-CPB interface triaxial test shear mechanical parameters Terzaghi¢ ')" href="#">s theoretical model

引用本文:

修占国，王述红，王斐笠，任凤玉，NGUYEN Vantuan. 充填体和围岩–充填体界面剪切特性对比试验研究[J]. 岩石力学与工程学报, 2021, 40(8): 1628-1642.
XIU Zhanguo，WANG Shuhong，WANG Feili，REN Fengyu，NGUYEN Vantuan. Comparative experimental study on the shear behavior of cemented paste backfill and surrounding rock-backfill interface. , 2021, 40(8): 1628-1642.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.0145 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I8/1628

[5]	CUI L，FALL M. Multiphysics modeling of arching effects in fill mass[J]. Computers and Geotechnics，2017，83：114-131.
[28]	ZHANG Q，LI X C，BAI B，et al. The shear behavior of sandstone joints under different fluid and temperature conditions[J]. Engineering Geology，2019，357：105-143.
[22]	LI W C，FALL M. Sulphate effect on the early age strength and self-desiccation of cemented paste backfill[J]. Construction and Building Materials，2016，106：296-604.
[8]	TERZAGHI K. Theoretical soil mechanics[M]. Hoboken，NJ：Wiley and Sons，1943：66-76.
[19]	SIMMS P，GRABINSKY M. Direct measurement of matric suction in triaxial tests on early-age cemented paste backfill[J]. Canadian Geotechnical Journal，2009，46：93-101.
[6]	LIU G S，LI L，YANG X C，et al. A numerical analysis of the stress distribution in backfilled stopes considering nonplanar interfaces between the backfill and rock walls[J]. International Journal of Geotechnical Engineering，2016，10：271-282.
[39]	BARLA G，BARLA M，MARTINOTTI M E. Development of a new direct shear testing apparatus[J]. Rock Mechanics and Rock Engineering，2010，43：117-122.
[2]	张常光，蔡明明，祁航，等. 考虑充填顺序与后壁黏结力的采场充填计算统一解[J]. 岩石力学与工程学报，2019，38(2)：226- 236.(ZHANG Changguang，CAI Mingming，QI Hang，et al. A unified solution for calculating mine backfills considering the backfilling order and the back wall cohesion[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(2)：226-236.(in Chinese))
[4]	FALL M，POKHAREL M. Coupled effects of sulphate and temperature on the strength development of cemented tailings backfills：Portland cement-paste backfill[J]. Cement and Concrete Composites，2010，32(10)：819-828.
[9]	TING C H，SHUKLA S K，SIVAKUGAN N. Arching in soils applied to inclined mine stopes[J]. International Journal of Geomechanics，2011，11(1)：29-35.
[11]	LI L，AUBERTIN M. Numerical investigation of the stress state in inclined backfilled stopes[J]. International Journal of Geomechanics，2009，9(2)：52-62.
[13]	FANG K，FALL M. Effects of curing temperature on shear behaviour of cemented paste backfill-rock interface[J]. International Journal of Rock Mechanics and Mining Sciences，2018，112：184-192.
[15]	FANG K，FALL M. Shear behavior of the interface between rock and cemented backfll：Effect of curing stress，drainage condition and backflling rate[J]. Rock Mechanics and Rock Engineering，2020，53(1)：325-336.
[17]	KOUPOULI N J F，BELEM T，RIVARD P，et al. Direct shear tests on cemented paste backfill-rock wall and cemented paste backfill-backfill interfaces[J]. International Journal of Rock Mechanics and Mining Sciences，2016，8(4)：472-479.
[20]	RANKINE R M，SIVAKUGAN N. Geotechnical properties of cemented paste backfill from Cannington Mine，Australia[J]. Geotechnical and Geological Engineering，2007，25：383-393.
[24]	DU S G，HU Y J，HU X F. Measurement of joint roughness coefficient by using profilograph and roughness ruler[J]. Journal of Earth Science，2009，20(5)：890-896.
[1]	刘超，韩斌，孙伟，等. 高寒地区废石破碎胶结充填体强度特性试验研究与工业应用[J]. 岩石力学与工程学报，2015，34(1)：139-147.(LIU Chao，HAN Bin，SUN Wei，et al. Experimental study of strength of backfillings of cemented rock debris and its application under low temperature condition[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(1)：139-147.(in Chinese))
[3]	吴爱祥，杨莹，程海勇，等. 中国膏体技术发展现状与趋势[J]. 工程科学学报，2018，40(5)：517-525.(WU Aixiang，YANG Ying，CHENG Haiyong，et al. Status and prospects of paste technology in China[J]. Chinese Journal of Engineering，2018，40(5)：517-525.(in Chinese))
[7]	MARSTON A. The theory of external loads on closed conduits in the light of the latest experiments[C]// Proceedings of the 9th Annual Meeting of the Highway Research Board. [S. l.]：[s. n.]，1930：9.
[12]	LIU G S，LI L，YANG X C，et al. Numerical analysis of stress distribution in backfilled stopes considering interfaces between the backfill and rock walls[J]. International Journal of Geomechanics，2017，17(2)：06016014.
[14]	FANG K，FALL M. Chemically induced changes in the shear behaviour of interface between rock and tailings backfill undergoing cementation[J]. Rock Mechanics and Rock Engineering，2019，52(9)：3 047-3 062.
[23]	ASTM International. ASTM D2487-17e1 Standard practice for classification of soils for engineering purposes(unified soil classification system)[S]. West Conshohocken，PA：ASTM International，2017.
[25]	DU S G，HU Y J，HU X F，et al. Comparison between empirical estimation by JRC-JCS model and direct shear test for joint shear strength[J]. Journal of Earth Science，2011，22(3)：411-420.
[34]	CUI L，FALL M. Mathematical modelling of cemented tailingsfall backfill：a review[J]. International Journal of Mining，Reclamation and Environment，2019，33(6)：389-408.
[10]	闫保旭，朱万成，侯晨，等. 充填体应力分布理论分析及数值模拟对比研究[J]. 东北大学学报：自然科学版，2019，40(12)：1 773- 1 778.(YAN Baoxu，ZHU Wancheng，HOU Chen，et al. A comparative study on the stress distribution in mine backfill through theoretical and numerical analysis[J]. Journal of Northeastern University Natural Science，2019，40(12)：1 773-1 778.(in Chinese))
[16]	NASIR O，FALL M. Shear behaviour of cemented pastefill-rock interfaces[J]. Engineering Geology，2008，101(3)：146-153.
[18]	BELEM T，BENZAAZOUA M，BUSSIERE B. Mechanical behaviour of cemented paste backfill[C]// Proceedings of the 53rd Canadian Geotechnical Conference. Montreal，Quebec，Canada：[s. n.]，2000：373-380.
[26]	SHEN Y J，WANG Y Z，YANG Y，et al. Influence of surface roughness and hydrophilicity on bonding strength of concrete-rock interface[J]. Construction and Building Materials，2019，213：156-166.
[27]	TIAN Y C，LIU Q S，MA H，et al. New peak shear strength model for cement filled rock joints[J]. Engineering Geology，2018，233：269-280.
[29]	MEHRISHAL S，SHARIFZADEH M，SHAHRIAR K，et al. An experimental study on normal stress and shear rate dependency of basic friction coefficient in dry and wet limestone joints[J]. Rock Mechanics and Rock Engineering，2016，49(12)：1-23.
[31]	熊兴邦. 摩尔圆包线参数的计算与其误差分析[J]. 工程勘察，1981，(6)：71-73.(XIONG Xingbang. The calculation of the parameters of the Mohr circle envelope and its error analysis[J]. Geotechnical Investigation and Surveying，1981，(6)：71-73.(in Chinese))
[33]	PIERCE M E. Laboratory and numerical analysis of the strength and deformation behaviour of paste backfill[M. S. Thesis][D]. Kingston，Canada：Queen¢s University，1997.
[35]	BELEM T，BENZAAZOUA M. An overview on the use of paste backfill technology as a ground support method in cut and-fill mines[C]// Proceedings of the 5th International Symposia on Ground support in Mining and Underground Construction. Perth，Australia：[s. n.]，2004：637-650.
[37]	闵弘，刘小丽，魏进兵，等. 大型现场室内两用直剪仪研制(I)：结构设计[J]. 岩土力学，2006，27(1)：164-168.(MIN Hong，LIU Xiaoli，WEI Jinbing，et al. A new large direct shear apparatus for field and laboratory test(I)：configuration[J]. Rock and Soil Mechanics，2006，27(1)：164-168.(in Chinese))
[38]	刘小丽，罗锦添，闵弘，等大型现场室内两用直剪仪研制(II)：试验测试[J]. 岩土力学，2006，27(2)：336-340.(LIU Xiaoli，LAW K T，MIN Hong，et al. A new large direct shear apparatus for field and laboratory test(II)：proof-testing[J]. Rock and Soil Mechanics，2006，27(2)：336-340.(in Chinese))
[40]	SHRIVASTAVA A K，RAO K S. Development of a large-scale direct shear testing machine for unfilled and infilled rock joints under constant normal stiffness conditions[J]. Geotechnical Testing Journal，2013，36 (5)：671-679.
[21]	BEHERA S K，GHOSH C N，MISHRA D P，et al. Strength development and microstructural investigation of lead-zinc mill tailings based paste backfill with fly ash as alternative binder[J]. Cement and Concrete Composites，2020，109：103553.
[30]	魏晓明，郭利杰，周小龙，等. 高阶段胶结充填体全时序应力演化规律及预测模型研究[J]. 岩土力学，2020，41(11)：1-8.(WEI Xiaoming，GUO Lijie，ZHOU Xiaolong，et al. Study on the stress evolution law and prediction model of high stage cemented backfill during full sequence period[J]. Rock and Soil Mechanics，2020，41(11)：1-8.(in Chinese))
[32]	HARUNA S，FALL M. Time- and temperature-dependent rheological properties of cemented paste backfill that contains superplasticizer[J]. Powder Technology，2017，360：731-740.
[36]	AUBERTIN M，LI L，ARNOLDI S，et al. Interaction between backfill and rock mass in narrow stopes[C]// Proceedings of Soil and Rock America. Verlag Glückauf，Cambridge，MA：[s. n.]，2003：1 157-1 164.
[41]	杜时贵，吕原君，罗战友，等. 岩体结构面抗剪强度尺寸效应联合试验系统及初级应用研究[J]. 岩石力学与工程学报，2021(待刊).(DU Shigui，LV Yuanjun，LUO Zhanyou，et al. Combined test system on size effect of rock joint shear strength and its primary application research[J]. Chinese Journal of Rock Mechanics and Engineering，2021(to be pressed).(in Chinese))