Evolutionary characteristics and correlations between deformation energy and strain in anthracite coal during stress wave-induced catastrophes

IF 6.9 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Engineering Geology Pub Date : 2025-01-21 DOI:10.1016/j.enggeo.2025.107931

Li Zhang, Tingjiang Tan, Enyuan Wang, Yubing Liu, Dong Chen

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引用次数: 0

Abstract

Understanding the deformation evolution process, as well as the energy storage and transformation behavior of coal under the influence of stress waves, is essential to promote technological progress and safety improvement in mining, underground engineering, and energy utilization. With the SHPB system, dynamic impact tests were conducted on anthracite coal under varying impact loads in this study. The deformation parameter characteristics of anthracite coal were examined regarding the storage and transformation patterns of deformation energy. Further analysis was performed on the attenuation laws of stress waves in the time and frequency domains. Besides, the correlation characteristics of strain and deformation energy in the stress wave disaster-causing mechanism were investigated, revealing that maximum and residual strain exhibited a notable linear relationship with impact load, with growth rates of 0.209 % and 0.212 %, respectively. Parameters εb and εh followed a down-concave exponential growth pattern and an up-concave exponential decrease pattern, respectively. Wd and Ws presented a notable linear strain rate effect, with growth rates of 2.44 and 2.30, respectively, and a significant linear energy effect, with growth rates of 0.46 and 0.44, respectively. Wb and Wh demonstrated a down-concave exponential growth pattern and an up-concave exponential decrease. The reflection and transmission effects of the stress wave in the time domain displayed clear linear growth and attenuation trends with the impact load, characterized by a growth rate of 0.020 and an attenuation rate of 0.015, respectively. Furthermore, an approximate linear increase appeared on the spectrum amplitudes of the incident, reflection, and transmission waves, with growth rates of 0.035, 0.032, and 0.0074, respectively.

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来源期刊

Engineering Geology 地学-地球科学综合

CiteScore

13.70

自引率

12.20%

发文量

327

审稿时长

5.6 months

期刊介绍： Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.