Impact of Temperature on the Hygroscopic Behavior and Mechanical Properties of Expansive Mudstone

Meng, Lingdong; Zhang, Wenxiu; Yang, Huakui; Xu, Shaoyun; Xu, Ming; Zhang, Lina; Dong, Wenlong

doi:10.3390/en17246491

Open AccessArticle

Impact of Temperature on the Hygroscopic Behavior and Mechanical Properties of Expansive Mudstone

by

Lingdong Meng

^1,2,*

,

Wenxiu Zhang

¹,

Huakui Yang

¹,

Shaoyun Xu

¹,

Ming Xu

¹,

Lina Zhang

¹ and

Wenlong Dong

²

¹

School of Architectural Engineering, Jiangsu College of Engineering and Technology, Nantong 226006, China

²

State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China

^*

Author to whom correspondence should be addressed.

Energies 2024, 17(24), 6491; https://doi.org/10.3390/en17246491

Submission received: 11 November 2024 / Revised: 13 December 2024 / Accepted: 19 December 2024 / Published: 23 December 2024

(This article belongs to the Section H: Geo-Energy)

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Abstract

Aiming at the large-scale nonlinear deformation of the roadway in Liangjia Coal Mine, Shandong Province, the mudstone of the 1602 working face is taken as the research object. A high-precision mudstone weathering test system integrating monitoring and control was developed, and the weathering tests of expanded mudstone were carried out at 10 °C, 20 °C, 30 °C and 40 °C. The results show that the hygroscopic curves of expanded mudstone demonstrate a nonlinear growth trend at different temperatures, and the influence of temperature on the hygroscopic curves is less than 20%. From the overall law, it can be roughly divided into three stages: the strong hygroscopic stage, the hygroscopic deceleration stage and the stable hygroscopic stage. The maximum expansion rates of the samples were 4.1%, 5.3%, 6.2% and 6.8%, respectively, and the water content and expansion rates corresponding to different ambient temperature and humidity were generally “concave”. The mechanical tests show that the mechanical properties of mudstone decrease as the ambient temperature increases, and the corresponding compressive strength decreases by 16~50%. The linear degradation is obvious, and the gradual expansion of peak strain indicates that the plasticity of the rock increases and the elastic modulus decreases linearly.

Keywords: mudstone; temperature field; swelling; failure mechanism; stability control

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MDPI and ACS Style

Meng, L.; Zhang, W.; Yang, H.; Xu, S.; Xu, M.; Zhang, L.; Dong, W. Impact of Temperature on the Hygroscopic Behavior and Mechanical Properties of Expansive Mudstone. Energies 2024, 17, 6491. https://doi.org/10.3390/en17246491

AMA Style

Meng L, Zhang W, Yang H, Xu S, Xu M, Zhang L, Dong W. Impact of Temperature on the Hygroscopic Behavior and Mechanical Properties of Expansive Mudstone. Energies. 2024; 17(24):6491. https://doi.org/10.3390/en17246491

Chicago/Turabian Style

Meng, Lingdong, Wenxiu Zhang, Huakui Yang, Shaoyun Xu, Ming Xu, Lina Zhang, and Wenlong Dong. 2024. "Impact of Temperature on the Hygroscopic Behavior and Mechanical Properties of Expansive Mudstone" Energies 17, no. 24: 6491. https://doi.org/10.3390/en17246491

APA Style

Meng, L., Zhang, W., Yang, H., Xu, S., Xu, M., Zhang, L., & Dong, W. (2024). Impact of Temperature on the Hygroscopic Behavior and Mechanical Properties of Expansive Mudstone. Energies, 17(24), 6491. https://doi.org/10.3390/en17246491

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Impact of Temperature on the Hygroscopic Behavior and Mechanical Properties of Expansive Mudstone

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