Analysis of Mudstone Fracture and Precursory Characteristics after Corrosion of Acidic Solution Based on Dissipative Strain Energy

被引:9
作者
Dong, Xu [1 ]
Wu, Yu [2 ]
Cao, Kewang [2 ,3 ]
Khan, Naseer Muhammad [4 ]
Hussain, Sajjad [5 ]
Lee, Seungyeon [6 ]
Ma, Chuan [6 ]
机构
[1] Xuzhou Coll Ind Technol, Sch Architecture Engn, Xuzhou 221140, Jiangsu, Peoples R China
[2] China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China
[3] Anhui Univ Finance & Econ, Sch Management Sci & Engn, Bengbu 233030, Peoples R China
[4] Balochistan Univ Informat Technol Engn & Manageme, Dept Min Engn, Quetta 87300, Pakistan
[5] Univ Engn & Technol, Dept Min Engn, Peshawar 25000, Pakistan
[6] Korea Univ, Sch Civil Environm & Architectural Engn, 145 Anam Ro, Seoul 02841, South Korea
关键词
strain energy; mudstone; fracture; precursor; acid solution; FAILURE; ROCK; MECHANISMS; LIMESTONE; STRESS;
D O I
10.3390/su13084478
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The deformation and failure of rock materials are closely related to the strain energy characteristics during the loading process. These strain energy characteristics and rock properties are greatly affected when the rock is subjected to the acidic solution. To study the effects of chemical solutions with different pH on the mechanical properties and strain energy mechanism of mudstone, the chemical corrosion mudstone samples are subjected to a uniaxial loading testing machine (CN64 electro-hydraulic servo). The corrosive effects of the acidic solution on the porosity, strain energy characteristics, and failure mode of mudstone samples were thoroughly investigated. The findings of this research indicate that: (1) The rate of change in the porosity and chemical damage coefficient of rock samples after chemical corrosion decreases, which is closely linear with the increase of solution pH; (2) The total strain energy, elastic strain energy, and dissipative strain energy decrease with the increase of pH, and, as a result, it is proposed that the observed turning point of the proportion curve of dissipated strain energy from decline to rise is used as a precursor point of the rock failure; (3) The stress value of the failure precursor point increases and the strain value decreases with the increase in pH value. However, the ratio of the stress value of the failure precursor point to the peak stress hardly changes with pH value, and its value is about 0.883; and (4) Rock samples soaked in a weak acidic chemical solution (pH 7.3 and 5.3) are damaged by tensile crack, while rock samples soaked in a strong acidic chemical solution (pH 3.3 and 1.3) are mainly damaged by the combination of tensile and shear. The findings of this study can be used to provide an experimental and theoretical foundation for monitoring rock engineering disasters such as slope, tunnel, and coal mine failures.
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页数:17
相关论文
共 33 条
[1]   A new seismic-based strain energy methodology for coal burst forecasting in underground coal mines [J].
Cai, Wu ;
Dou, Linming ;
Si, Guangyao ;
Cao, Anye ;
Gong, Siyuan ;
Wang, Guifeng ;
Yuan, Shasha .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2019, 123
[2]   Prediction Model of Dilatancy Stress Based on Brittle Rock: A Case Study of Sandstone [J].
Cao, K. W. ;
Khan, N. M. ;
Liu, W. ;
Hussain, S. ;
Zhu, Y. G. ;
Cao, Z. T. ;
Bian, Y. C. .
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, 2021, 46 (03) :2165-2176
[3]   Cyclic fatigue characteristics of rock failure using infrared radiation as precursor to violent failure: Experimental insights from loading and unloading response [J].
Cao, Kewang ;
Ma, Liqiang ;
Wu, Yu ;
Khan, Naseer Muhammad ;
Spearing, A. J. S. ;
Hussain, Sajjad ;
Yang, Jie .
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2021, 44 (02) :584-594
[4]   Experimental and numerical study of coal-rock bimaterial composite bodies under triaxial compression [J].
Chen, Yulong ;
Zuo, Jianping ;
Liu, Dejun ;
Li, Yingjie ;
Wang, Zhenbo .
INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY, 2021, 8 (05) :908-924
[5]  
Ding WX, 2015, ROCK SOIL MECH, V36, P1825, DOI 10.16285/j.rsm.2015.07.001
[6]   Mechanical properties and charge signal characteristics in coal material failure under different loading paths [J].
Ding, Xin ;
Xiao, Xiao-chun ;
Wu, Di ;
Lv, Xiang-feng .
INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY, 2019, 6 (01) :138-149
[7]   Fracture behavior and acoustic emission characteristics of sandstone samples with inclined precracks [J].
Dou, Litong ;
Yang, Ke ;
Chi, Xiaolou .
INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY, 2021, 8 (01) :77-87
[8]   Effects of dynamic strain rate on the energy dissipation and fragment characteristics of cross-fissured rocks [J].
Feng, Peng ;
Xu, Yuan ;
Dai, Feng .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2021, 138
[9]   Experimental study of limestone micro-fracturing under a coupled stress, fluid flow and changing chemical environment [J].
Feng, Xia-Ting ;
Ding, Wuxiu .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2007, 44 (03) :437-448
[10]   Controlling mine pressure by subjecting high-level hard rock strata to ground fracturing [J].
Gao, Rui ;
Kuang, Tiejun ;
Zhang, Yanqun ;
Zhang, Wenyang ;
Quan, Chunyang .
INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY, 2021, 8 (06) :1336-1350