不同加载速率下差异性含水率尾砂胶结充填体力学行为及损伤特性研究

doi:10.11896/cldb.21090173

Abstract
Figure/Table
References
Related Citation (6)

Download:

Full Text ( PDF ) (32201KB)
Export: BibTeX | EndNote (RIS)

Abstract The mechanical properties of backfill are the key indexes for filling ratio design and maintaining the stability of underground stope. The variation of the loading rate and the environment (humidity, temperature) in which backfill is located can affect the mechanical behavior of the backfill. In this work, uniaxial compressive strength tests with variable loading rates (0.1 mm/min, 0.25 mm/min, 0.5 mm/min, 1 mm/min and 2 mm/min) were carried out for backfill with different water content (dry, saturated and nature). The mechanical parameters and failure modes of fillings under state change and loading rate were obtained. According to the energy conservation theorem, the relationship between the energy evolution and stress-strain behavior of backfill under different conditions was studied. On this basis, the damage variable of backfill based on energy was established. The results show that:(i) as the loading rate increased, the compressive strength of backfill first increased and then decreased, and there was a critical loading rate. The dry and saturated had strengthening and weakening effects on the compressive strength and elastic modulus of backfill respectively. The dry led to the transformation of backfill from ductility to brittleness, and the stress-strain curve decreased rapidly after reaching the peak stress. Although the saturated state was conducive to the ductility of backfill, the weakening effect of water makes it destroy under small strain. (ii) When the loading rate increased from 0.1 mm/min to 2 mm/min, the failure mode of the dry backfill gradually changed from tensile shear mixed failure to tensile failure (less shear failure). The saturated filling body is mainly tensile failure, while the nature backfill showed tensile shear mixed failure as a whole. (iii) Increasing the loading rate accelerated the energy exchange of backfill. The effects of drying, saturation and nature on the energy evolution of backfill were mainly reflected in the plastic yield stage and failure stage of the corresponding stress-strain curve. The slope of the energy dissipation strain curve is dry, saturation and nature from large to small. (iv) The damage strain characteristic curve based on energy evolution showed four stages: initial damage, stable damage development, accele-rated damage and failure. Increasing the load rate shortens the initial strain in the accelerated damage stage, and the dry and saturated aggravates the damage development of backfill. This study can provide a theoretical basis for further understanding the load change caused by mining disturbance and the mechanical behavior and stability of backfill under different humidity conditions.

Key words： cemented tailings backfill loading rate water content energy evolution damage characteristic

Published: Online: 2023-01-03

CLC number:

TD853

Fund:National Natural Science Foundation of China (51804134, 51804135), the Natural Science Foundation of Jiangxi Province (20181BAB216013), and Program of Qingjiang Excellent Young Talents, Jiangxi University of Science and Technology (JXUSTQJYX2019007).

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	SONG Xuepeng
	HAO Yuxin
	WANG Shi
	LIU Chenhui
	ZHANG Liao

Cite this article:

SONG Xuepeng,HAO Yuxin,WANG Shi, et al. Study on Mechanical Behavior and Damage Characteristics of Cemented Tailings Backfill with Different Water Content Under Different Loading Rates[J]. Materials Reports, 2022, 36(24): 21090173-10.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.21090173 OR http://www.mater-rep.com/EN/Y2022/V36/I24/21090173

1 Wu A X, Yang Y, Cheng H Y, et al. Chinese Journal of Engineering, 2018, 40(5), 517(in Chinese).
吴爱祥, 杨莹, 程海勇, 等. 工程科学学报, 2018, 40(5), 517.
2 Deng H W, Duan T, Tian G L, et al. Minerals, 2021, 11(8),886.
3 Xie H P. Journal of China Coal Society, 2019, 44(5), 1283(in Chinese).
谢和平. 煤炭学报, 2019, 44(5), 1283.
4 Li D X, Zhang P Q, Zhao G L, et al. The Chinese Journal of Nonferrous Metals, DOI: 10.11817/j.ysxb.1004.0609.2021-37637(in Chinese)
李德贤, 张鹏强, 赵国亮, 等. 中国有色金属学报, DOI: 10.11817/j.ysxb.1004.0609.2021-37637.
5 Xie H P. Advanced Engineering Sciences, 2017, 49(2), 1(in Chinese).
谢和平. 工程科学与技术, 2017, 49(2), 1.
6 Wang S, Song X, Wei M L, et al. Construction and Building Materials, 2021, 297(11),123780.
7 Yan B X, Zhu W C, Hou C, et al. Construction and Building Materials, 2020, 249, 118733.
8 Xu W B, ZhangY L, Zuo X H, et al. Cement and Concrete Composites, 2020, 114, 103804.
9 Hou Y Q, Yin S H, Yang S X, et al. The Chinese Journal of Nonferrous Metals, 2021, 31(6), 1661(in Chinese).
侯永强, 尹升华, 杨世兴, 等. 中国有色金属学报, 2021, 31(6), 1661.
10 Chen Q S, Tao Y B, Zhang Q L, et al. Chemosphere, 2022, 286,131630.
11 Jafari M, Grabinsky M. International Journal of Rock Mechanics and Mining Sciences, 2021, 144(11),104749.
12 Xue G L, Yilmaz E, Feng G R, et al. Construction and Building Materials, 2021, 289, 123163.
13 Wu J Y. Macroscopic and microscopic mechanical properties and creep model of cemented waste rock backfill.Ph.D. Thesis, China University of Mining and Technology, China,2019(in Chinese).
吴疆宇. 胶结充填体的宏细观力学特性及蠕变模型. 博士学位论文, 中国矿业大学, 2019.
14 Chen A P, Dong F S, Zhang Y S, et al. Journal of China University of Mining & Technology, 2021, 50(1), 50(in Chinese).
程爱平, 董福松, 张玉山, 等. 中国矿业大学学报, 2021, 50(1), 50.
15 Hu J H, Zhao F W, Ren Q F, et al. Royal Society Open Science, 2019, 6(12), 191227.
16 Wu J Y, Yin Q, Gao Y, et al. Environmental Science and Pollution Research, 2021, 28(2),16589.
17 Haruna S, Fall M. Canadian Journal of Civil Engineering, 2020, 48(4), 429.
18 Ouattara D, Belem T, Mbonimpa M, et al. Construction and Building Materials, 2018, 181, 59.
19 Yu L Q, Yao Q L, Xu Q, et al. Journal of China Coal Society, 2020, 46(11), 3488(in Chinese).
于利强, 姚强岭, 徐强, 等. 煤炭学报, 2020, 46(11), 3488.
20 Luo K, Zhao G D, Zeng J J, et al. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(8),1833(in Chinese).
罗可, 招国栋, 曾佳君, 等. 岩石力学与工程学报, 2018, 37(8),1833.
21 Fan X Q, Liu J D, Hu S W, et al. Journal of Building Structures, 2020, 41(7),204(in Chinese).
范向前, 刘决丁, 胡少伟, 等. 建筑结构学报, 2020, 41(7),204.
22 Hou Y Q, Yin S H, Cao Y, et al. Journal of Hunan University (Natural Sciences), 2020, 47(8), 108(in Chinese).
侯永强, 尹升华, 曹永, 等. 湖南大学学报(自然科学版), 2020, 47(8), 108.
23 Gan D Q, Han L, Liu Z Y, et al. Metal Mine, 2016, 45(12), 150(in Chinese).
甘德清, 韩亮, 刘志义,等. 金属矿山, 2016, 45(12), 150.
24 Li Y G, Jin L Z, Tan H, et al. Journal of Harbin Institute of Technology, 2016, 48(9),49(in Chinese).
李雅阁, 金龙哲, 谭昊, 等. 哈尔滨工业大学学报, 2016, 48(9),49.
25 Cao S, Yilmaz E, Song W D, et al. Construction and Building Materials, 2019, 213, 313.
26 Liu J W. Evolution of stress and displacement and stability of surrounding rock mass-backfill combination system in backfilling mining. Ph.D. Thesis,China University of Mining and Technology, China, 2020(in Chinese).
刘佳维. 充填开采围岩-充填体组合体系应力-位移演化及稳定性研究.博士学位论文, 中国矿业大学, 2020.
27 Cao S R. Research on damage and destructive mechanism of tailings cemented backfill at different saturations. Master's Thesis, Jiangxi University of Science and Technology, China,2018(in Chinese).
曹世荣. 不同饱和度尾砂胶结充填体损伤破坏机理研究. 硕士学位论文, 江西理工大学, 2018.
28 Liu J W, Sui W H, Zhang D Y, et al. Journal of Cleaner Production, 2020, 250, 119576.
29 Yu Z Q, Wang Y Y, Wang H. IEEE Access, 2021, 9, 9356.
30 Zhang C, Yang C Q, Bai Y. Rock and Soil Mechanics, 2021, 42(9), 2343 (in Chinese).
张超, 杨楚卿, 白允. 岩土力学, 2021, 42(9), 2343.
31 Wang C L, Du G Y, Li E B, et al. Chinese Journal of Rock Mechanics and Engineering, 2021,40(11), 2238. (in Chinese).
王传乐, 杜广印, 李二兵, 等.岩石力学与工程学报, 2021, 40 (11), 2238.
32 Zhao K, Huang M, Yan Y J, et al. Chinese Journal of Rock Mechanics and Engineering, 2021, 40(s1), 2781(in Chinese).
赵康, 黄明, 严雅静, 等. 岩石力学与工程学报, 2021, 40(s1), 2781.
33 Xiu Z G, Wang S H, Ji Y C, et al. Construction and Building Materials, 2021, 271, 121526.
34 Xu W B, Song W D, Wang D X, et al. Journal of China University of Mining & Technology, 2014, 43(5), 808(in Chinese).
徐文彬, 宋卫东, 王东旭, 等. 中国矿业大学学报, 2014, 43(5), 808.
35 Hou Y Q, Yin S H, Cao Y, et al. Journal of Central South University (Science and Technology), 2020, 51(7),1955(in Chinese).
侯永强, 尹升华, 曹永, 等. 中南大学学报:自然科学版, 2020, 51(7),1955.
36 Xu X D, Sun G H, Yao X L, et al. Rock and Soil Mechanics, 2020, 41(9), 3003(in Chinese).
徐晓冬, 孙光华, 姚旭龙, 等. 岩土力学, 2020, 41(9), 3003.
37 Cheng A P, Zhang Y S, Wang P, et al. Journal of Harbin Institute of Technology, 2019, 51(10), 130(in Chinese).
程爱平, 张玉山, 王平, 等. 哈尔滨工业大学学报, 2019, 51(10), 130.
38 Miao S J, Liu Z J, Zhao X G, et al. Chinese Journal of Rock Mechanics and Engineering, 2021, 40(5), 928(in Chinese).
苗胜军, 刘泽京, 赵星光, 等. 岩石力学与工程学报, 2021, 40(5), 928.