Mechanical and microseismic characteristics of sandstones subject to moderate low-frequency differential cyclic loading (DCL) followed by monotonic loading up to failure

• Published in: Acta geotechnica Vol. 18; no. 1; pp. 187 - 215
• Main Authors: Song, Zhengyang, Konietzky, Heinz, Wu, Yunfeng, Cai, Xin
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.01.2023; Springer Nature B.V
• Subjects: Acoustic emission; Acoustics; Behavior; Civil engineering; Coal; Coal mines; Coal mining; Complex Fluids and Microfluidics; Cyclic loading; Cyclic loads; Dissipation; Drilling; Earthquakes; Energy; Energy dissipation; Engineering; Evolution; Foundations; Geoengineering; Geotechnical Engineering & Applied Earth Sciences; Hydraulics; Hysteresis; Investigations; Kaiser effect; Laboratories; Load; Microseisms; Mining engineering; Modulus of elasticity; Research Paper; Sandstone; Sediment samples; Sedimentary rocks; Soft and Granular Matter; Soil Science & Conservation; Solid Mechanics; Statistical methods; Strain; Underground mines; Unloading; Acoustic emission; Loading/unloading rate; Energy dissipation; Phase shift; Differential cyclic loading (DCL)

This work aims to experimentally investigate the behaviour of sandstone drilled from an underground coal mine exposed to low-frequency cyclic loading with distinct loading/unloading rates, namely differential cyclic loading (DCL). Three loading modes with different loading/unloading rates were appli...