早期受载对矸石胶结充填体力学特性及损伤破坏的影响

doi:10.13722/j.cnki.jrme.2021.0829

Abstract
Figure/Table
References (0)
Related Citation (4)

Download: PDF (3180 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to study the effect of the early load on the later mechanical properties of cemented gangue backfill(CGB)，the specimens cured for 7 days were loaded at 4 stress levels，and after 28 days of continuously loading，unloaded and used for carrying out uniaxial compression test. The ultrasonic wave velocity changes in the CGB during the continuous loading process and the acoustic emission response characteristics during the uniaxial compression process were monitored，and the microscopic morphology of the specimens was observed using a scanning electron microscope. The results show that the early load has a great influence on the mechanical properties of the CGB. When the early stress level is less than 80%，the load has a significant strengthening effect on the compressive strength and the elastic modulus of the CGB. With increasing the early stress level，the transverse strain and the Poisson¢s ratio increase exponentially，and the specimen failure form gradually changes from shear failure to split failure. The ultrasonic wave velocity shows obvious multistage characteristics during the continuous load process，and the acoustic emission activity of the CGB subjected to high stress levels decreases. Early load promotes cement hydration reaction and contributes to the improvement of the strength. According to the test results，a damage evolution model of the early loaded CGB was established under uniaxial compression，which can provide a basis for the design of the backfill in the structural filling.

Key words： mining engineering cemented gangue backfill early load mechanical property failure characteristic ultrasound acoustic emission microscopic mechanism

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	FENG Guorui1
	2
	XIE Wenshuo1
	2
	GUO Yuxia1
	2
	GUO Jun1
	2
	RAN Hongyu1
	2
	ZHAO Yonghui1
	2

Cite this article:

FENG Guorui1,2,XIE Wenshuo1, et al. Effect of early load on mechanical properties and damage of cemented gangue backfill[J]. , 2022, 41(4): 775-784.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0829 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I4/775

[1] 钱鸣高，缪协兴，许家林. 资源与环境协调(绿色)开采[J]. 煤炭学报，2007，32(1)：1–7.(QIAN Minggao，MIAO Xiexing，XU Jialin. Green mining of coal resources harmonizing with environment[J]. Journal of China Coal Society，2007，32(1)：1–7.(in Chinese))
[2] 钱鸣高，许家林，缪协兴. 煤矿绿色开采技术[J]. 中国矿业大学学报，2003，32(4)：5–10.(QIAN Minggao，XU Jialin，MIAO Xiexing. Green technique in coal mining[J]. Journal of China University of Mining and Technology，2003，32(4)：5–10.(in Chinese))
[3] 冯国瑞，杜献杰，郭育霞，等. 结构充填开采基础理论与地下空间利用构想[J]. 煤炭学报，2019，44(1)：74–84.(FENG Guorui，DU Xianjie，GUO Yuxia，et al. Basic theory of constructional backfill mining and the underground space utilization concept[J]. Journal of China Coal Society，2019，44(1)：74–84.(in Chinese))
[4] 路彬，张新国，李飞，等. 短壁矸石胶结充填开采技术与应用[J]. 煤炭学报，2017，42(增1)：7–15.(LU Bin，ZHANG Xinguo，LI Fei，et al. Study and application of short-wall gangue cemented backfilling technology[J]. Journal of China Coal Society，2017，42(Supp.1)：7–15.(in Chinese))
[5] ZHANG X G，LIN J，LIU J X，et al. Investigation of hydraulic-mechanical properties of paste backfill containing coal gangue-fly ash and its application in an underground coal mine[J]. Energies，2017，10(9)：1 309.
[6] 侯永强，尹升华，杨世兴，等. 冲击载荷下胶结充填体的力学性能及能耗特征[J]. 华中科技大学学报：自然科学版，2020，48(8)：50–56.(HOU Yongqiang，YIN Shenghua，YANG Shixing，et al. Mechanical properties and energy consumption characteristics of cemented backfill under impact load[J]. Journal of Huazhong University of Science and Technology：Natural Science，2020，48(8)：50–56.(in Chinese))
[7] GUO Y X，RAN H Y，FENG G R，et al. Effects of curing under step-by-step load on mechanical and deformation properties of cemented gangue backfill column[J]. Journal of Central South University，2020，27(11)：3 417–3 435.
[8] RAN H Y，GUO Y X，FENG G R，et al. Creep properties and resistivity-ultrasonic-AE responses of cemented gangue backfill column under high-stress area[J]. International Journal of Mining Science and Technology，2021，31(3)：401–412.
[9] 曹帅，宋卫东，薛改利，等. 分层尾砂胶结充填体力学特性变化规律及破坏模式[J]. 中国矿业大学学报，2016，45(4)：717–722. (CAO Shuai，SONG Weidomng，XUE Gaili，et al. Mechanical characteristics variation of stratified cemented tailing backfilling and its failure modes[J]. Journal of China University of Mining and Technology，2016，45(4)：717–722.(in Chinese))
[10] 谭玉叶，汪杰，宋卫东，等. 循环冲击下胶结充填体动载力学特性试验研究[J]. 采矿与安全工程学报，2019，36(1)：184–190.(TAN Yuye，WANG Jie，SONG Weidong，et al. Experimental study on mechanical properties of cemented tailings backfill under cycle dynamic loading test[J]. Journal of Mining and Safety Engineering，2019，36(1)：184–190.(in Chinese))
[11] 李雅阁，金龙哲，谭昊，等. 胶结充填体力学特性的加载速率效应试验[J]. 哈尔滨工业大学学报，2016，48(9)：49–53.(LI Yage，JIN Longzhe，TAN Hao，et al. Experiment of loading rate effect on mechanical characteristics of cemented filling body[J]. Journal of Harbin Institute of Technology，2016，48(9)：49–53.(in Chinese))
[12] 尹升华，侯永强，杨世兴，等. 单轴压缩下混合集料胶结充填体变形破坏及能耗特征分析[J]. 中南大学学报：自然科学版，2021，52(3)：936–947.(YIN Shenghua，HOU Yongqiang，YANG Shixing，et al. Analysis of deformation failure and energy dissipation of mixed aggregate cemented backfill during uniaxial compression[J]. Journal of Central South University：Science and Technology，2021，52(3)：936–947.(in Chinese))
[13] WU D，ZHAO R K，QU C L. Effect of curing temperature on mechanical performance and acoustic emission properties of cemented coal gangue-fly ash backfill[J]. Geotechnical and Geological Engineering，2019，37(4)：3 241–3 253.
[14] 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 Mechanics and Engineering，2019，38(Supp.1)：3 053–3 060.(in Chinese))
[15] 吴疆宇，靖洪文，浦海，等. 分形矸石胶结充填体的宏细观力学特性[J]. 岩石力学与工程学报，2022(待刊).(WU Jiangyu，JING Hongwen，PU Hai，et al. Macroscopic and mesoscopic mechanical properties of cemented waste rock backfill using fractal gangue[J]. Chinese Journal of Rock Mechanics and Engineering，2022(to be Pressed).(in Chinese))
[16] GUO Y X，ZHAO Y H，WANG S W，et al. Stress-strain-acoustic responses in failure process of coal rock with different heights to diameter ratios under uniaxial compression[J]. Journal of Central South University，2021，28(6)：1 724–1 736.
[17] 辛亚军，吕鑫，姬红英，等. 水泥石试样早期损伤特性与后期力学行为分析[J]. 煤炭学报，2020，45(9)：3 119–3 130.(XIN Yajun，LV Xin，JI Hongying，et al. Analysis of early damage characteristics and late mechanical behavior of cement specimens[J]. Journal of China Coal Society，2020，45(9)：3 119–3 130.(in Chinese))
[18] CLAISSE P，DEAN C. Compressive strength of concrete after early loading[J]. Construction Materials，2012，166(3)：152–157.
[19] HARTMANN A，KHAKHUTOV M，BUHL J C. Hydrothermal synthesis of CSH-phases(tobermorite) under influence of Ca-formate[J]. Materials Research Bulletin，2014，51：389–396.
[20] CUI L，FALL M. Mechanical and thermal properties of cemented tailings materials at early ages：Influence of initial temperature，curing stress and drainage conditions[J]. Construction and Building Materials，2016，125：553–563.
[21] 潘慧敏，王树伟，赵庆新. 早期受扰混凝土受硫酸盐侵蚀后的受荷损伤模型[J]. 中国铁道科学，2018，39(1)：23–30.(PAN Huimin，WANG Shuwei，ZHAO Qingxin. Loading damage model of early disturbed concrete under sulfate attack[J]. China Railway Science，2018，39(1)：23–30.(in Chinese))
[22] 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))