Study on Characteristics of Energy Storage and Acoustic Emission of Rock under Different Moisture Content

Chuanming Li, Nan Liu, Wanrong Liu and Ruimin Feng
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Chuanming Li: Key Laboratory of Safety and High-Efficiency Coal Mining, Ministry of Education, Anhui University of Science and Technology, Huainan 232001, China
Nan Liu: Key Laboratory of Safety and High-Efficiency Coal Mining, Ministry of Education, Anhui University of Science and Technology, Huainan 232001, China
Wanrong Liu: School of Architecture & Civil engineering, Liaocheng University, Liaocheng 252059, China
Ruimin Feng: Department of Civil Engineering, University of Arkansas, Fayetteville, AR 72701, USA

Sustainability, 2021, vol. 13, issue 3, 1-15

Abstract: In order to study the energy storage and sound emission characteristics of rocks under different water content, uniaxial compression test, cyclic loading, unloading test and sound emission test were carried out using RMT-150B rock mechanics test system and DS5 acoustic emission system. The results show that the total strain energy of saturated rock samples and the area of hysteresis loop are the largest in the same period number, which indicates that the presence of water can reduce the elastic limit of rock samples, making the rock very easy to deform and even damage. Acoustic emission tests show that the damage energy of water-bearing rocks is small. The higher the water content, the smaller the peak damage energy. The bending energy index W E T of the rock sample under saturated and natural state is smaller than that under dry state, which further indicates that the presence of water can reduce the elastic limit of the rock and soften it. The results can provide a basis for the prediction of underground engineering construction and rock failure instability.

Keywords: moisture content; sandstone; acoustic emission; energy storage (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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