Mechanical properties and synergistic deformation characteristics of tailings cemented filling assembled material body with different cement-tailings ratios
(1. School of Architectural and Surveying and Mapping Engineering，Jiangxi University of Science and Technology，Ganzhou，Jiangxi 341000，China；2. Lingbao Jinyuan Mining Company Limited，Sanmenxia，Henan 472500，China)
Abstract：In order to study the mechanical properties and synergistic deformation characteristics of the tailings cemented filling material assembled with various cement-tailings ratios，the uniaxial compression test was used to study two different cement-tailings ratios assemblies. Experimental results show that：(1) the overall peak strength of assembled material body depends on the peak strength of the small cement-tailings ratio specimen. When the peak strength of the small cement-tailings ratio specimen is close to the proportional ultimate strength of the large cement-tailings ratio specimen，the overall peak strength of the assembled material body is reduced by 29.22%. The smaller the peak strength ratio of the two specimens is，the larger the overall elastic modulus of the assembled body. The Poisson?s ratio of the specimen with a large cement-tailings ratio becomes smaller，while becomes larger with a mall cement-tailings ratio，with the peak strength ratio of the two specimens in assembled body. (2) The stress-strain curve of the assembled backfill body is similar to the curve of the specimen with a smaller peak strength in terms of value and change trend. The failure mode is mainly manifested as the shear failure and tension failure penetrated in the specimen with a small cement-tailings ratio. Although the failure deformation of two specimens in the assembled body shows a certain hysteresis in time，its synergistic deformation characteristics are obvious. (3) The acoustic emission of the assembled body with different cement-tailings ratios has different activity characteristics in the four stages and the stress peak lags behind the peak of acoustic emission ringing count. The count peaks of the large cement-tailings ration specimens in the assembled body account for 13.77%，14.16% and 6.56% of the corresponding small cement-tailings ratio ones. As the strength ratio of the assembled body increasing，the acoustic emission ringing count of the combination decreases gradually.
[1] 周科平，刘 维，周彦龙，等. 不同渗透力的类充填体力学特性及损伤软化本构模型研究[J]. 岩土力学，2019，40(10)：3 724–3 732. (ZHOU Keping，LIU Wei，ZHOU Yanlong，et al. Mechanical properties and damage-softening constitutive model of backfill with different osmotic pressures[J]. Rock and Soil Mechanics，2019，40(10)：3 724–3 732.(in Chinese))
[2] BEHERA S K，GHOSH C N，MISHRA D P，et al. Strength development and microstructural investigation of lead-zinc mill tailings based pasete backfill with fly ash as alternative binder[J]. Cement and Concrete Composites，2020，109：103553.
[3] 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.
[4] 魏晓明，郭利杰，李长洪，等. 高阶段胶结充填体强度空间变化规律研究[J]. 岩土力学，2018，39(增2)：45–52.(WEI Xiaoming，GUO Lijie，LI Changhong，et al. Study of space variation law of strength of high stage cemented backfill[J]. Rock and Soil Mechanics，2018，39(Supp.2)：45–52.(in Chinese))
[5] 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))
[6] 郑保才，周华强，何荣军. 煤矸石膏体充填材料的试验研究[J]. 采矿与安全工程学报，2006，23(4)：460–463.(ZHENG Baocai，ZHOU Huaqiang，HE Rongjun. Experimental research on coal gangue paste filling material[J]. Journal of Mining and safety Engineering，2006，23(4)：460–463.(in Chinese))
[7] 谢学斌，李建坤，董宪久，等. 胶结充填体‐顶板系统稳定性研究[J]. 岩土力学，2018，39(11)：4 183–4 190.(XIE Xuebin，LI Jiankun，DONG Xianjiu，et al. Stability analysis of cemented filling body and roof[J]. Rock and Soil Mechanics，2018，39(11)：4 183–4 190.(in Chinese))
[8] 徐文彬，曹培旺，程世康. 不同偏置裂纹充填体断裂特性试验[J]岩土力学，2018，39(5)：1 643–1 652.(XU Wenbin，CAO Peiwang，CHENG Shikang. An experiment on fracture characteristic behaviour of cemented backfill with different offset notch cracks[J]. Rock and Soil Mechanics，2018，39(5)：1 643–1 652.(in Chinese))
[9] 徐文彬，王运敏，党 鹏，等. 胶结充填体压缩破坏前兆多参数表征[J]. 岩土力学，2016，37(2)：399–406.(XU Wenbin，WANG Yunmin，DANG Peng，et al. Precursors to compression failure of cemented backfill mass based on the multiparameter method[J]. Rock and Soil Mechanics，2016，37(2)：399–406.(in Chinese))
[10] 李新旺，赵新元，程立朝，等. 密实充填矿压显现时空演化规律研究[J]. 岩石力学与工程学报，2020，39(2)：341–348.(LI Xinwang，ZHAO Xinyuan，CHENG Lichao，et al. Study on space-time evolution law of strata behaviors under compacted filling[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(2)：341–348.(in Chinese))
[11] 黄 鹏，张兴军，郭宇鸣，等. 充填体协同支架控顶效应研究[J].采矿与安全工程学报，2020，37(1)：128–135.(HUANG Peng，ZHANG Xinjun，GUO Yuming，et al. Study on control effect of roof based on backfilling body cooperating with support[J]. Journal of Mining and safety Engineering，2020，37(1)：128–135.(in Chinese))
[12] 刘志祥，李夕兵. 尾砂分形级配与胶结强度的知识库研究[J]. 岩石力学与工程学报，2005，24(10)：1 789–1 793.(LIU Zhixiang，LI Xibing. Study on fractal gradation of tailings and knowledge bank of its cementing strength[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(10)：1 789–1 793.(in Chinese))
[13] 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))
[14] 杨志强，高 谦，王永前，等. 金川全尾砂‐棒磨砂混合充填料胶砂强度与料浆流变特性研究[J]. 岩石力学与工程学报，2014，33(增2)：3 685–3 991.(YANG Zhiqiang，GAO Qian，WANG Yongqian，et al. Research on filling body strength and rheological properties of mixed filling mortar with unclassified tailings and rod milling sand in Jinchuan mine[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：3 685–3 991.(in Chinese))
[15] 付自国，乔登攀，郭忠林，等. 超细尾砂胶结充填体强度计算模型及应用[J]. 岩土力学，2018，39(9)：3 147–3 156.(FU Ziguo，QIAO Dengpan，GUO Zhonglin，et al. A model for calculating strength of ultra-fine tailings cemented hydraulic fill and its application[J]. Rock and Soil Mechanics，2018，39(9)：3 147–3 156.(in Chinese))
[16] 程爱平，戴顺意，张玉山，等. 胶结充填体损伤演化尺寸效应研究[J]. 岩石力学与工程学报，2019，38(增1)：3 053–3 060.(CHENG Aiping，DAI Shunyi，ZHANG Yushan，et al. Study on size effect of damage evolution of cemented backfill[J]. Chinese Journal of Rock Mechamics and Engineering，2019，38(Supp.1)：3 053–3 060.(in Chinese))
[17] 谢生荣，郜明明，陈冬冬，等. 充填开采采场球应力壳分布及演化规律研究[J]. 采矿与安全工程学报，2019，36(1)：16–23.(XIE Shengrong，GAO Mingming，CHEN Dongding，et al. Study on the distribution and evolution characteristics of spherical stress shell in backfillinf mining stope[J]. Journal of Mining and Safety Engineering，2019，36(1)：16–23.(in Chinese))
[18] 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))
[19] 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))
[20] ZHAO K， YU X， ZHU S，et al. Acoustic emission investigation of cemented paste backfill prepared with tantalum-niobium tailings[J]. Construction and Building Materials，2020，237：117523.
[21] ZHAO K，YU X，ZHU S，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
[22] 刘晓云，叶义成，王其虎，等. 单轴压缩下不同强度组合复合岩体相似材料试件力学特性研究[J]. 岩土力学，2017，39(增2)：183–190.(LIU Xiaoyun，YE Yicheng，WANG Qihu，et al. Mechanical properties of similar material specimens of composite rock masses with different strengths under uniaxial compression[J]. Rock and Soil Mechanics，2017，39(Supp.2)：183–190.(in Chinese))
[23] 曹 帅，薛改利，宋卫东. 组合胶结充填体力学特性试验与应用研究[J]. 采矿与安全工程学报，2019，36(3)：601–608.(CAO Shuai，XUE Gaili，SONG Weidong. Experimental research on mechanical properties of combined cemented tailings backfill and its application[J]. Journal of Mining and Safety Engineering，2019，36(3)：601–608.(in Chinese))
[24] 邝泽良，郑小龙，陈 军，等. 循环荷载作用下胶结充填体声发射特征试验研究[J]. 有色金属科学与工程，2017，8(4)：91–97.(KUANG Zeliang，ZHENG Xiaolong，CHEN Jun，et al. Experimental study on acoustic emission characreristics of consolidated filling body under cyclic loading[J]. Nonferrous Metals Science and Engineering，2017，8(4)：91–97.(in Chinese))
[25] SUN Q，TIAN S，SUN Q，et al. Preparation and microstructure of fly ash geopolymer paste backfill material[J]. Journal of Cleaner Production，2019，225：376–390.
[26] LIU L，XIN J，HUAN C，et al. Pore and strength characteristics of cemented paste backfill using sulphide tailings：Effect of sulphur content[J]. Construction and Building Materials，2020，237：117452.
[27] LIU L，ZHOU P，FENG Y，et al. Quantitative investigation on micro-parameters of cemented paste backfill and its sensitivity analysis [J]. Journal of Central South University，2020，27(1)：267–276.
2021, Vol. 40 
