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Experimental study on triaxial unloading mechanical properties and acoustic emission response of shale with different water contents

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Abstract

Water is one of the most significant factors influencing the mechanical properties of rocks. Triaxial unloading acoustic emission (AE) tests were performed to study the unloading mechanical characteristics and damage evolution mechanism of shale with various water contents. The damage evolution characteristics of shale under triaxial unloading conditions were analyzed using AE time series parameters. The results show that when the water saturation coefficient rises, the number of AE rings and the energy value of shale decrease. Based on the results of the AE test, the ratios of the crack initiation stress and damage stress to the peak stress are 0.4 ~ 0.6 and 0.9, respectively. The closure stress, crack initiation stress, damage stress, and other characteristic stresses determined by the stress axial strain method and the AE method all decrease with the increase of the water saturation coefficient, demonstrating that water has a significant impact on the mechanical characteristics of the shale during the unloading damage process. Based on the test results, a statistical damage constitutive model is established, and it uses the AE cumulative ringing count to represent the damage variable. The calculated results of the model are in good agreement with the experimental data, indicating that the established model can more accurately depict the evolution process of shale unloading damage and failure under different water contents. The study's findings can be used as a reference for determining the extent of rock damage caused by water–rock interaction.

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The data used to support this study are available from the corresponding author upon request.

References

  • Al-Bazali T, Zhang J, Chenevert ME, Sharma MM (2008) Factors controlling the compressive strength and acoustic properties of shales when interacting with water based fluids. Int J Rock Mech Min 45:729–738

    Article  Google Scholar 

  • Amann F, Button EA, Evans KF, Gischig VS, Blumel M (2011) Experimental study of the brittle behavior of clay shale in rapid unconfined compression. Rock Mech Rock Eng 44(4):415–430

    Article  Google Scholar 

  • Bai QS, Tu SH, Zhang C, Zhu DF (2016) Discrete element modeling of progressive failure in a wide coal roadway from water-rich roofs. Int J Coal Geol 167:215–229

    Article  Google Scholar 

  • Brown ET (1981) ISRM suggested methods: rock characterization testing and monitoring. Pergamon Press, Oxford, pp 81–85

    Google Scholar 

  • Cai M, Kaiser PK, Tasaka Y (2004) Generalized crack initiation and crack damage stress thresholds of brittle rock masses near underground excavations. Int J Rock Mech Min 41:833–847

    Article  Google Scholar 

  • Cao WG, Zhao MH, Liu CX (2004) Study on the model and its modifying method for rock softening and damage based on Weibull random distribution. Chin J Rock Mech Eng 23(19):3226–3231

    Google Scholar 

  • Chinese National Standard SL264-2001 (2001) Specifications for rock tests in water conservancy and hydroelectric engineering. The National Ministry of Water Resources of the People’s Republic of China, Beijing

  • Dehghanpour H, Lan Q, Saeed Y, Fei H, Qi Z (2013) Spontaneous imbibition of brine and oil in gas shales: effect of water adsorption and resulting microfractures. Energ Fuel 27(6):3039–3049

    Article  Google Scholar 

  • Eberhardt E, Stead D, Stimpson B, Read R (1998) Identifying crack initiation and propagation thresholds in brittle rock. Can Geotech J 35(2):222–233

    Article  Google Scholar 

  • Hayatdavoudi A (1999) Changing chemophysical properties of formation and drilling fluid enhances penetration rate and bit life. SPE International Symposium on Oilfield Chemistry, OnePetro

  • Heiple CR, Carpenter SH, Carr MJ (1981) Acoustic emission from dislocation motion in precipitation-strengthened alloys. Metal Sci 15:587–598

    Article  Google Scholar 

  • Kachanov L (1986) Introduction to continuum damage mechanics. Springer Science & Business Media, Berlin

    Book  Google Scholar 

  • Kim JS, Lee KS, Cho WJ, Choi HJ, Cho GC (2015) A comparative evaluation of stress-strain and acoustic emission methods for quantitative damage assessments of brittle rock. Rock Mech Rock Eng 48(2):495–508

    Article  Google Scholar 

  • Kuilaa U, Dewhurstb DN, Raven SAF (2011) Stress anisotropy and velocity anisotropy in low porosity shale. Tectonophysics 503:34–44

    Article  Google Scholar 

  • Lemaitre J (1985) A continuous damage mechanics model for ductile fracture. J Eng Mater Techno 107:83–89

    Article  Google Scholar 

  • Li Q, Wang GH, Lu WB, Niu XQ, Chen M, Yan P (2018) Influence of reservoir water levels on the protective performance of concrete gravity dams subjected to underwater explosions. J Struct Eng 144(9):211–225

    Article  Google Scholar 

  • Li B, Yang FW, Du PZ, Liu ZH (2022) Study on the triaxial unloading creep mechanical properties and creep model of shale in different water content states. B Eng Geol Environ 81(10):1–16

    Article  Google Scholar 

  • Lin P, Li SC, Xu ZH (2019) Water inflow prediction during heavy rain while tunneling through karst fissured zones. Int J Geomech 19(8):04019093

    Article  Google Scholar 

  • Liu BX, Huang JL, Wang ZY, Liu L (2009) Study on damage evolution and acoustic emission character of coal-rock under uniaxial compression. Chin J Rock Mech Eng 5:3234–3238

    Google Scholar 

  • Liu X, Xiong J, Liang L, Luo C, Zhang A (2014) Analysis the wettability of Longmaxi Formation shale in the south region of Sichuan Basin and its influence. Nat Gas Geosci 25(10):1644–1652

    Google Scholar 

  • Lockner DA (1993) The role of acoustic emission in the study of rock fracture. Int J Rock Mech Min 30(7):883–899

    Article  Google Scholar 

  • Lyu Q, Ranjith P, Long X, Kang Y, Huang M (2015) A review of shale swelling by water adsorption. J Nat Gas Sci Eng 27:1421–1431

    Article  Google Scholar 

  • Lyu Q, Long XP, Ranjith PG, Tan JQ, Kang Y (2018) Experimental investigation on the mechanical behaviours of a low-clay shale under water-based fluids. Eng Geol 233:124–138

    Article  Google Scholar 

  • Mogi K (1971) Fracture flow of rocks under high triaxial compression. J Geophys Res 76:1255–1269

    Article  Google Scholar 

  • Morsy S, Sheng JJ (2014) Imbibition characteristics of the barnett shale formation. SPE Unconventional Resources Conference. OnePetro

  • Ohnaka M, Mogi K (1982) Frequency characteristics of acoustic emission in rocks under uniaxial compression and its relation to the fracturing process to failure. J Geophys Res 87:3873–3884

    Article  Google Scholar 

  • Peng J, Cai M, Rong G, Zhou CB, Zhao XG (2015) Stresses for crack closure and its application to assessing stress-induced microcrack damage. Chin J Rock Mech Eng 34(6):1091–1100

    Google Scholar 

  • Rybacki E, Reinicke A, Meier T, Makasi M, Dresen G (2015) What controls the mechanical properties of shale rocks? –Part I: strength and Young’s modulus. J Petrol Sci Eng 135:702–722

    Article  Google Scholar 

  • Song K, Wang FW, Yi QL (2018) Landslide deformation behavior influenced by water level fluctuations of the Three Gorges Reservoir (China). Eng Geol 247:58–68

    Article  Google Scholar 

  • Tang CA, Chen ZH, Xu XH, Li C (1997) A theoretical model for Kaiser effect in rock. Pure Appl Geophys 150(2):203–215

    Article  Google Scholar 

  • Tang M, Wu Z, Wang A, Zuo Y, Lou Y, Sun W (2021) Study on the microscopic fracture process and acoustic emission of shale based on digital image, Geofluids, 2021. Article ID 8874918:1–14

    Google Scholar 

  • Wong R (1998) Swelling softening behaviour of La Biche shale. Can Geotech J 35:206–221

    Article  Google Scholar 

  • Wong LNY, Varun M, Liu G (2016) Water effects on rock strength and stiffness degradation. Acta Geotech 11:713–737

    Article  Google Scholar 

  • Wu S, Ge HK, Wang XQ, Meng FB (2017) Shale failure processes and spatial distribution of fractures obtained by AE monitoring. J Nat Gas Sci Eng 41:82–92

    Article  Google Scholar 

  • Zhu XJ (1996) Characteristics of soft rocks interacting with water. Min Sci Techno 4(3):46–50

    Google Scholar 

Download references

Funding

This work is supported by the Major science and technology projects of the Ministry of Water Resources (No. SKR-2022029), Henan Province Key Research and Development and Promotion Special Project (Scientific and Technological Research) (No.222102320441) and the Postdoctoral Research Grant in Henan Province (No. 202103106).

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Authors and Affiliations

  1. Yellow River Engineering Consulting Co., Ltd, Zhengzhou, 450003, Henan, China

    Bingyang Li, Fengwei Yang, Haofei Li, Pengzhao Du & Zhenhong Liu

  2. Key Laboratory of Water Management and Water Security for Yellow River Basin, Ministry of Water Resources (Under Construction), Zhengzhou, 450003, Henan, China

    Bingyang Li, Fengwei Yang, Haofei Li, Pengzhao Du & Zhenhong Liu

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  1. Bingyang Li
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  2. Fengwei Yang
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  3. Haofei Li
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Contributions

BL, FY, and HL wrote the main manuscript text. PD and ZL prepared figures and tables. All authors reviewed the manuscript.

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Correspondence to Fengwei Yang.

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Li, B., Yang, F., Li, H. et al. Experimental study on triaxial unloading mechanical properties and acoustic emission response of shale with different water contents. Environ Earth Sci 82, 414 (2023). https://doi.org/10.1007/s12665-023-11124-6

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