Influence of discontinuity on failure and acoustic emission behavior of rockburst in hard rock under deep ground

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-03-12 DOI:10.1016/j.tafmec.2025.104923

Linfei Wang , Shiying Han , Jun Peng , Chuanhua Xu , Kun Pan

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引用次数: 0

Abstract

In the field of underground engineering, rockburst disaster is often associated with the discontinuous plane within rock mass. The discontinuity resided in rock has an important influence on the performance of rockburst. However, the mechanism of discontinuous plane-related rockburst remains unclearly understood. This study experimentally investigates the influence of structural plane on rockburst evolution using true triaxial tests on sandstone specimens with a circular through-hole. Acoustic emissions (AE) techniques are employed to analyze micro-cracking behavior during rock failure. Results show that structural plane induces an asymmetric rockburst pattern in hole sidewalls, with large-sized plate-like and fine-grained fragments constituting 68.1% and 13% in volume for discontinuous specimens, respectively. AE data indicate that specimen with a structural plane reach crack initiation earlier, exhibiting higher AE activity and an earlier onset of rockburst. The failure is a tensile-shear mixed mode, with a shear ratio of 19.1%. The structural plane also delays rockburst precursor response, showing a lower precursor response coefficient (PRC). The results in this study improve our understanding in mechanism of structural plane-related rockburst.

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.