矸石胶结充填体单轴压缩损伤破坏尺寸效应研究

doi:10.13722/j.cnki.jrme.2021.0527

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Abstract In order to study the influence of size on damage and failure of cemented gangue backfill body(CGBB)，cube specimens with sizes of 70.7，100，150，200 and 300 mm were prepared for uniaxial compression test. The acoustic emission(AE) and resistivity values of specimens during loading were monitored，and the micro morphology of the specimens was observed by scanning electron microscope. The damage evolution and failure mode of CGBB with different sizes were discussed. The results show that the uniaxial compressive strength of CGBB decreases with increasing the size，and the failure mode of CGBB gradually changes from splitting failure to shear failure with increasing the size. The smaller CGBB shows stronger AE activity in the initial compaction stage than in the post-peak failure stage. The sudden change of AE ringing and the stable stage of resistivity can be used as the precursor to judge the failure of CGBB. According to the test results，a calculation formula of size effect law of the compressive strength of CGBB and a damage constitutive model of CGBB with different sizes were established，which can provide reference for the design of backfill body in structural backfill.

Key words： mining engineering cemented gangue backfill body size effect failure mode acoustic emission resistivity micro morphology damage model

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	Articles by authors
	GUO Yuxia1
	2
	ZHAO Yonghui1
	2
	FENG Guorui1
	2
	RAN Hongyu1
	2
	ZHANG Yujiang1
	2

Cite this article:

GUO Yuxia1,2,ZHAO Yonghui1, et al. Study on damage size effect of cemented gangue backfill body under uniaxial compression[J]. , 2021, 40(12): 2434-2444.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0527 OR https://rockmech.whrsm.ac.cn/EN/Y2021/V40/I12/2434

[1] 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))
[2] DU X J，FENG G R，QI T Y，et al. Failure characteristics of large unconfined cemented gangue backfill structure in partial backfill mining[J]. Construction and Building Materials，2019，194：257–265.
[3] 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.
[4] 郭育霞，冉洪宇，冯国瑞，等. 酸性环境中矸石胶结充填体强度及徐变特征[J]. 采矿与安全工程学报，2021，38(2)：361–369.(GUO Yuxia，RAN Hongyu，FENG Guorui，et al. Strength and creep deformation properties of cemented gangue backfill in acid environment[J]. Journal of Mining and Safety Engineering，2021，38(2)：361–369.(in Chinese))
[5] 冉洪宇，郭育霞，冯国瑞，等. 分级加载下矸石胶结充填材料蠕变特性研究[J]. 矿业研究与开发，2020，40(2)：42–47.(RAN Hongyu，GUO Yuxia，FENG Guorui，et al. Creep properties of coal gangue cemented backfill material under step loading[J]. Mining Research and Development，2020，40(2)：42–47.(in Chinese))
[6] 陈瑜，黄永恒，曹平，等. 不同高径比时软岩强度与变形尺寸效应试验研究[J]. 中南大学学报：自然科学版，2010，41(3)：1 073–1 078.(CHEN Yu，HUANG Yongheng，CAO Ping，et al. Size effect experimental study of strength and deformation in different height-to-diameter ratio soft rocks[J]. Journal of Central South University：Science and Technology，2010，41(3)：1 073–1 078.(in Chinese))
[7] 刘刚，肖福坤，秦涛. 小尺寸效应下岩石力学特性及声发射规律[J]. 岩石力学与工程学报，2018，37(增2)：3 905–3 917.(LIU Gang，XIAO Fukun，QIN Tao. Rock mechanics characteristics and acoustic emission rule under small-size effect[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(Supp.2)：3 905–3 917.(in Chinese))
[8] 唐欣薇，石建军，郭长青，等. 自密实混凝土强度尺寸效应的试验与数值仿真[J]. 水力发电学报，2011，30(3)：145–151.(TANG Xinwei，SHI Jianjun，GUO Changqing，et al. Tests and numerical simulation of size-compacting concrete[J]. Journal of Hydroelectric Engineering，2011，30(3)：145–151.(in Chinese))
[9] 朱其志，闵中泽，王岩岩，等. 粉砂岩三轴压缩试验中的试样尺寸效应研究[J]. 岩石力学与工程学报，2019，38(增2)：3 296–3 303. (ZHU Qizhi，MIN Zhongze，WANG Yanyan，et al. Study on the size effect of silty sandstone samples under conventional triaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.2)：3 296–3 303.(in Chinese))
[10] 杨伟军，袁帅，杨春侠. 砂浆单轴抗压强度尺寸效应律研究[J]. 湖南大学学报：自然科学版，2019，46(11)：79–86.(YANG Weijun，YUAN Shuai，YANG Chunxia. Study on size effect law of compressive strength of building mortar under uniaxial compression[J]. Journal of Hunan University：Natural Science，2019，46(11)：79–86.(in Chinese))
[11] 张国凯，李海波，夏祥，等. 单轴加载条件下花岗岩声发射及波传播特性研究[J]. 岩石力学与工程学报，2017，36(5)：1 133–1 144. (ZHANG Guokai，LI Haibo，XIA Xiang，et al. Experiment study on acoustic emission and wave propagation in granite under uniaxial compression[J]. Chinese Journal of Rock Mechnicals and Engineering，2017，36(5)：1 133–1 144.(in Chinese))
[12] 高祥，刘善军，黄建伟，等. 应变率对岩石变形过程声发射特征的影响[J]. 岩石力学与工程学报，2018，37(4)：887–897.(GAO Xiang，LIU Shanjun，HUANG Jianwei，et al. The influence of strain rate on AE characteristics during rock deformation[J]. Chinese Journal of Rock Mechanicals and Engineering，2018，37(4)：887–897.(in Chinese))
[13] 程爱平，戴舒意，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 Shuyi，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))
[14] 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))
[15] 董晓强，黄凤凤，苏楠楠，等. 非饱和黄土受压过程中交流电阻率特性试验研究[J]. 岩石力学与工程学报，2015，34(1)：189–197.(DONG Xiaoqiang，HUANG Fengfeng，SU Nannan，et al. Experimental study of AC electrical resistivity of unsaturated loess during compression[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(1)：189–197.(in Chinese))
[16] QI T Y，FENG G R. Resistivity and AE response characteristics in the failure process of CGB under uniaxial loading[J]. Advances in Materials Science and Engineering，2017，2017：1–11.
[17] WANG J，FU J X，SONG W D，et al. Mechanical behavior，acoustic emission properties and damage evolution of cemented paste backfill considering structural feature[J]. Construction and Building Materials，2020，261：119958.
[18] 储超群，吴顺川，张诗淮，等. 层状砂岩力学行为各向异性与破裂特征[J]. 中南大学学报：自然科学版，2020，51(8)：2 232–2 246. (CHU Chaoqun，WU Shunchuan，ZHANG Shihuai，et al. Mechaincal behavior anisotropy and fracture characteristics of bedded sandstone[J]. Journal of Central South University：Science and Technology，2020，51(8)：2 232–2 246.(in Chinese))
[19] 安然，孔令伟，柏巍，等. 单轴荷载下残积土的电阻率损伤模型及干湿循环效应[J]. 岩石力学与工程学报，2020，39(增1)：3 159–3 167.(AN Ran，KONG Lingwei，BAI Wei，et al. The resistivity damage model of residual soil under uniaxial load and the law of drying-wetting effects[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(Supp.1)：3 159–3 167.(in Chinese))
[20] ZHOU Y，YU X，GUO Z Q，et al. On acoustic emission characteristics，initiation crack intensity，and damage evolution of cement-paste backfill under uniaxial compression[J]. Construction and Building Materials，2020，269：121261.
[21] XU W B，HOU Y B，SONG W D，et al. Resistivity and thermal infrared precursors associated with cemented backfill mass[J]. Journal of Central South University，2016，23(9)：2 329–2 335.
[22] DU X J，FENG G R，ZHANG Y J，et al. Bearing mechanism and stability monitoring of cemented gangue-fly ash backfill column with stirrups in partial backfill engineering[J]. Engineering Structure，2019，188：603–612.
[23] DU X J，FENG G R，GUO Y X，et al. Failure analyses of unconfined CCWBM body in uniaxial compression based on central pressure variation[J]. Waste Management and Resarch，2018，36(2)：159–168.
[24] WANG Z H，FENG G R，QI T Y，et al. Evaluation of static segregation of cemented gangue-fly ash backfill material using electrical resistivity method[J]. Measurement，2020，154：107483.
[25] BAZANT Z P. Size effect[J]. International Journal of Solidsand Structures，2000，37(4)：69–80.
[26] 邓绪彪，刘远征，邢矿，等. 基于声发射时空演化的岩石全应力–应变曲线阶段特征分析[J]. 岩石力学与工程学报，2018，37(增2)：4 086–4 099.(DENG Xubiao，LIU Yuanzheng，XING Kuang，et al. Analysis based on AE space-time evolution characteristics for stage division of whole stress-strain curve of rock[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(Supp.2)：4 086–4 099.(in Chinese))
[27] FENG G R，QI T Y，DU X J，et al. Acoustic emission and ultrasonic characteristics in the failure process of cemented waste concrete-coal gangue backfilling(CWCGB) under uniaxial loading[J]. Advances in Civil Engineering，2018，2018：1–12.
[28] 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))