<p class=

doi:10.13722/j.cnki.jrme.2021.0587

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

Download: PDF (6472 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Fiber-Reinforced Backfill(FRB) has obvious advantages in filling the of goafs. To investigate the microscopic damage mechanism of FRB，a series of tests were conducted on glass fiber reinforced ultra-fine tailings backfill with different cement tailings ratios by using compression machine，scanning electron microscope，nuclear magnetic resonance instrument and acoustic emission monitor to systematically analyze the fracture expansion and damage evolution process of FRB from microscopic level. Studies have shown that：the incorporation of glass fiber can improve the initial structure of the backfill material and reduce the initial defects，among which the improvement effect is most obvious for the specimen with 1∶12 cement tailings ratio. There are obvious differences between the damage patterns of CPB and FRB. The damage of CPB is dominated by primary fissures through the specimen，with spalling at local locations，while the damage of FRB is dominated by more small-scale secondary fissures，which is caused by the crack-resisting effect of glass fibers on the backfill material. Due to this reason，the acoustic emission(AE) characteristics of FRB and CPB also show a significant difference：the CPB specimen shows an“AE drop zone”in the ringing count after the yield point(about 85% of the peak stress)，while the FRB specimen shows an“AE rise zone”in the ringing count after the yield point. The results of the study can not only provide theoretical guidance for promoting the application of glass fiber reinforced backfills，but also provide acoustic emission criteria for predicting the peak strength of FRB materials.

Key words： mining engineering fiber reinforced backfill ultra-fine tailings glass fibers nuclear magnetic resonance fracture evolution acoustic emission signature

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHAO Kang1
	2
	3
	HE Zhiwei1
	YAN Yajing1
	YU Xiang1
	SONG Yufeng1
	YANG Jian1

Cite this article:

ZHAO Kang1,2,3, et al. Microscopic failure mechanism of fiber reinforced ultra-fine tailings backfill#br#[J]. , 2022, 41(S1): 3010-3020.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0587 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/IS1/3010

[1] ZHOU Y，YAN Y J，ZHAO K，et al. Study of the effect of loading modes on the acoustic emission fractal and damage characteristics of cemented paste backfill[J]. Construction and Building Materials，2021，277：122311.
[2] 赵康，黄明，严雅静，等. 不同灰砂比尾砂胶结充填材料组合体力学特性及协同变形研究[J]. 岩石力学与工程学报，2021，40(增1)：2 781–2 789.(ZHAO Kang，HUANG Ming，YAN Yajing，et al. Study on mechanical properties and synergistic deformation characteristics of tailings cemented filling assembled material body with different lime-sand ratios[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(Supp.1)：2 781–2 789.(in Chinese))
[3] YILMAZ E，BELEM T，BUSSIÈRE B，et al. Relationships between microstructural properties and compressive strength of consolidated and unconsolidated cemented paste backfills[J]. Cement and Concrete Composites，2011，33(6)：702–715.
[4] 程爱平，董福松，张玉山，等. 单轴压缩胶结充填体裂纹扩展及汇集模式[J]. 中国矿业大学学报，2021，50(1)：50–59.(CHENG Aiping，DONG Fusong，ZHANG Yushan，et al. Crack propagation and convergence mode of cemented backfill under uniaxial compression[J]. Journal of China University of Mining and Technology，2021，50(1)：50–59.(in Chinese))
[5] LU H J，QI C C，CHEN Q S，et al. A new procedure for recycling waste tailings as cemented paste backfill to underground stopes and open pits[J]. Journal of Cleaner Production，2018，188：601–612.
[6] SUN Q，TIAN S，SUN Q W，et al. Preparation and microstructure of fly ash geopolymer paste backfill material[J]. Journal of Cleaner Production，2019，225：376–390.
[7] 刘浪，方治余，张波，等. 矿山充填技术的演进历程与基本类别[J]. 金属矿山，2021，(3)：1–10.(LIU Lang，FANG Zhiyu，ZHANG Bo，et al. Development history and basic categories of mine backfill technology[J]. Metal Mine，2021，(3)：1–10.(in Chinese))
[8] 孙琦，李喜林，卫星，等. 腐蚀和养护耦合作用下充填膏体强度演化规律研究[J]. 硅酸盐通报，2015，34(6)：1 480–1 484.(SUN Qi，LI Xilin，WEI Xing，et al. Strength evolution rule of filling paste under the coupling influence of corrosion and maintenance[J]. Bulletin of the Chinese Ceramic Society，2015，34(6)：1 480–1 484.(in Chinese))
[9] ZHAO K，YU X，ZHU S T，et al. Acoustic emission fractal characteristics and mechanical damage mechanism of cemented paste backfill prepared with tantalum niobium mine tailings[J]. Construction and Building Materials，2020，258：119720.
[10] 宋卫东，任海锋，曹帅，等. 侧限压缩条件下充填体与岩柱相互作用机理[J]. 中国矿业大学学报，2016，45(1)：49–55.(SONG Weidong，REN Haifeng，CAO Shuai，et al. Interaction mechanism between backfill and rock pillar under confined compression condition[J]. Journal of China University of Mining and Technology，2016，45(1)：49–55.(in Chinese))
[11] 邱华富，刘浪，孙伟博，等. 采空区充填体强度分布规律试验研究[J]. 中南大学学报：自然科学版，2018，49(10)：2 584–2 592.(QIU Huafu，LIU Lang，SUN Weibo，et al. Experimental study on strength distribution of backfill in goaf[J]. Journal of Central South University：Science and Technology，2018，49(10)：2 584–2 592.(in Chinese))
[12] 李长洪，魏晓明，张立新，等. 胶结充填体与矿石的能量匹配关系及固化时间的确定[J]. 采矿与安全工程学报，2017，34(6)：1 116– 1 121.(LI Changhong，WEI Xiaoming，ZHANG Lixin，et al. Energy matching relationship between cemented backfill body and ore and determination of curing time[J]. Journal of Mining and Safety Engineering，2017，34(6)：1 116–1 121.(in Chinese))
[13] 赵康，朱胜唐，周科平，等. 不同配比及浓度条件下钽铌矿尾砂胶结充填体力学性能研究[J]. 应用基础与工程科学学报，2020，28(4)：833–842.(ZHAO Kang，ZHU Shengtang，ZHOU Keping，et al. Mechanical properties of tantalum niobium tailings cemented concrete under different proportions and concentration[J]. Journal of Basic Science and Engineering，2020，28(4)：833–842.(in Chinese))
[14] HE Z W，ZHAO K，YAN Y J，et al. Mechanical response and acoustic emission characteristics of cement paste backfill and rock combination[J]. Construction and Building Materials，2021，288：123119.
[15] XU W B，LI Q L，LIU B. Coupled effect of curing temperature and age on compressive behavior，microstructure and ultrasonic properties of cemented tailings backfill[J]. Construction and Building Materials，2020，237：11738.
[16] 陈绍杰，刘小岩，韩野，等. 充填膏体蠕变硬化特征与机制试验研究[J]. 岩石力学与工程学报，2016，35(3)：570–578.(CHEN Shaojie，LIU Xiaoyan，HAN Ye，et al. Experimental study of creep hardening characteristic and mechanism of filling paste[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(3)：570–578.(in Chinese))
[17] 钟志彬，HU Xiaozhi，邓荣贵，等. 含裂隙充填节理岩体的压剪断裂机制研究[J]. 岩石力学与工程学报，2018，37(增1)：3 320–3 331. (ZHONG Zhibin，HU Xiaozhi，DENG Ronggui，et al. Study on the compression-shear fracture mechanism of infilled jointed rock mass with pre-crack[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(Supp.1)：3 320–3 331. (in Chinese))
[18] CAVUSOGLU I，YILMAZ E，YILMAZ A O. Sodium silicate effect on setting properties，strength behavior and microstructure of cemented coal fly ash backfill[J]. Powder Technology，2021，384：17–28.
[19] CHEN Q S，TAO Y B， FENG Y，et al. Utilization of modified copper slag activated by Na2SO4 and CaO for unclassified lead/zinc mine tailings based cemented paste backfill[J]. Journal of Environmental Management，2021，290：112608.
[20] 叶根喜，朱权洁，李舒霞，等. 千米深井沿空留巷复合充填体研制与应用[J]. 采矿与安全工程学报，2016，33(5)：787–794.(YE Genxi，ZHU Quanjie，LI Shuxia，et al. Development and application of composite filling body in gob-side entry retaining with 1 000 m- plus deep coal mine[J]. Journal of Mining and Safety Engineering，2016，33(5)：787–794.(in Chinese))
[21] 吴疆宇，冯梅梅，郁邦永，等. 连续级配废石胶结充填体强度及变形特性试验研究[J]. 岩土力学，2017，38(1)：101–108.(WU Jiangyu，FENG Meimei，YU Bangyong，et al. Experimental study of strength and deformation characteristics of cemented waste rock backfills with continuous gradation[J]. Rock and Soil Mechanics，2017，38(1)：101–108.(in Chinese))
[22] LIU F Y，XU K，DING W Q，et al. Microstructural characteristics and their impact on mechanical properties of steel-PVA fiber reinforced concrete[J]. Cement and Concrete Composites，2021，124：104196
[23] ESMAEILI J，ANDALIBI K，GENCEL O，et al. Pull-out and bond-slip performance of steel fibers with various ends shapes embedded in polymer-modified concrete[J]. Construction and Building Materials，2021，271：121531.
[24] BANTHIA N，TROTTIER J. Deformed steel fiber-cementitious matrix bond under impact[J]. Cement and Concrete Research，1991，21(1)：158–168.
[25] MERTA I，TSCHEGG E. Fracture energy of natural fiber reinforced concrete[J]. Construction and Building Materials，2013，40：991–997.
[26] MISHUROVA T，RACHMATULIN N，FONTANA P，et al. Evaluation of the probability density of inhomogeneous fiber orientations by computed tomography and its application to the calculation of the effective properties of a fiber-reinforced composite[J]. International Journal of Engineering Science，2018，122：14–29.
[27] 赵康，宋宇峰，于祥，等. 不同纤维作用下尾砂胶结充填体早期力学特性及损伤本构模型研究[J]. 岩石力学与工程学报，2022，41(2)：282–291.(ZHAO Kang，SONG Yufeng，YU Xiang，et al. Study on early mechanical properties and damage constitutive model of tailing-cemented backfill with different fibers[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(2)：282–291.(in Chinese))
[28] 侯永强，尹升华，赵国亮，等. 聚丙烯纤维增强尾砂胶结充填体力学及流动性能研究[J]. 材料导报，2022. http：//kns.cnki.net/ kcms/detail/ 50.1078.TB.20210624.1546.002.html.(HOU Yongqiang，YIN Shenghua，ZHAO Guoliang，et al. Study on the mechanical and flow properties of polypropylene fiber reinforced cemented tailings backfill[J]. Materials Reports，2022. http：//kns.cnki.net/kcms/detail/50.1078.TB.20210624. 1546.002.html.(in Chinese))
[29] 马国伟，李之建，易夏玮，等. 纤维增强膏体充填材料的宏细观试验[J]. 北京工业大学学报，2016，42(3)：406–412.(MA Guowei，LI Zhijian，YI Xiawei，et al. Macro-meso experiment of fiber-reinforced cement paste filling material[J]. Journal of Beijing University of Technology，2016，42(3)：406–412.(in Chinese))
[30] XUE G L，YILMAZ E，FENG G R，et al. Bending behavior and failure mode of cemented tailings backfill composites incorporating different fibers for sustainable construction[J]. Construction and Building Materials，2021，289：123163.
[31] 俞家欢. 超强韧性纤维混凝土的性能及应用[M]. 北京：中国建筑工业出版社，2012：5–6.(YU Jiahuan. Performance and application of super strong toughness fiber concrete[M]. Beijing：China Architecture and Building Press，2012：5–6.(in Chinese))
[32] 沈荣熹，崔琪，李清海. 新型纤维增强水泥基复合材料[M]. 北京：中国建筑工业出版社，2004：61–62.(SHEN Rongxi，CUI Qi，LI Qinghai. New type fiber reinforced cement-based composites[M]. Beijing：China Architecture and Building Press，2004：61–62.(in Chinese))
[33] 赵康，朱胜唐，周科平，等. 钽铌矿尾砂胶结充填体力学特性及损伤规律研究[J]. 采矿与安全工程学报，2019，36(2)：413–419.(ZHAO Kang，ZHU Shengtang，ZHOU Keping，et al. Research on mechanical properties and damage law of tantalum-niobium ore cemented tailings backfill[J]. Journal of Mining and Safety Engineering，2019，36(2)：413–419.(in Chinese))
[34] 尹光志，魏作安，许江. 细粒尾矿及其堆坝稳定性分析[M]. 重庆：重庆大学出版社，2004：78–79.(YIN Zhiguang，WEI Zuoan，XU Jiang. Analysis of the stability of fine-grained tailings and its dam[M]. Chongqing：Chongqing University Press，2004：78–79.(in Chinese))
[35] MORADIAN Z，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.
[36] 安定超，张盛，张旭龙，等. 岩石断裂过程区孕育规律与声发射特征实验研究[J]. 岩石力学与工程学报，2021，40(2)：290–301. (AN Dingchao，ZHANG Sheng，ZHANG Xulong，et al. Experimental study on incubation and acoustic emission characteristics of rock fracture process zones[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(2)：290–301.(in Chinese))