Acoustic emission (AE) characterization is an effective technique to indirectly capture the failure process of quasi brittle rock. In previous studies, both experiments and numerical simulations were adopted investigate AE characteristics rocks. However, as most popular model, moment tensor model (MTM) cannot be constrained by experimental result because there a gap between MTM in principle, signal processing energy analysis. this paper, we developed particle-velocity-based (PVBM) that...

Abstract This study explores explore the failure characteristics of high temperature granite under different numbers heating–cooling cycles. Combining a series laboratory uniaxial compression tests with acoustic emission (AE) monitoring, it reveals AE and damage behavior in stages. Increasing number cycles exponentially raised mass-loss volume-increase rates decreased P-wave velocity. These results indicate that multiple irreversibly damaged rock mass. Moreover, variations both velocity...

The chalk cliffs of northern France are exposed to considerable erosion, resulting in a significant coastal retreat up 1 m per year on average. A key concern is how the mechanical properties evolve under different weathering conditions. Previous research, based limited number samples, has provided preliminary understanding potential changes altered and unaltered states. As part DEPHY3GEO project, we conducted experiments Saint Marguerite Chalk, which Newhaven Chalk Formation. Due inherent...

The Universal Distinct Element Code (UDEC) based on Discrete Method (DEM) has gained widespread prevalence in simulating multiscale rock failure varied branches of geotechnics. Simulation performance demonstrates a heavy reliance modelling parameters. trial-and-error approach and parametric sensitivity analysis have long been the primary method employed calibration UDEC. However, they share drawbacks excessive computational resources, high dependence human subjectivity, challenge handling...

Rock bridges have long been recognised to provide crucial resistance against rock mass failure. Multiple with diverse scales are widespread in natural masses. Despite prior positive contributions a single bridge, mechanical behaviours of diverse-scale remain elusive. In particular, whether interact and how their failure processes evolve still open questions. To fill this gap, block-based discrete element method, specifically the Universal Distinct Element Code, was employed simulate granite...

In this work, we investigated the effects of clay mineral content on mechanical damage behavior and cracking mechanism rock-like specimens with different bentonite (montmorillonite) contents by performing uniaxial compression tests. Based obtained stress–strain curves, evolution stages stress thresholds were determined. The internal microcracks microstructural characteristics fracture surfaces was analyzed using acoustic emission (AE) technology scanning electron microscopy. results showed...

Abstract Landslides have posed a huge threat to the ecological environment and human society all over world. As most conventional reinforcement method, anti-slide piles are widely used in of slopes. Currently, more attention has been paid low-cost high-efficiency optimal design piles. However, limitations method optimization for slopes reinforced with still exist. In this paper, new multi-objective comprehensive was proposed slope The factor safety, internal force, deflection were selected...

Abstract Landslides have posed a huge threat to the ecological environment and human society all over world. As most conventional reinforcement method, anti-slide piles are widely used in of slopes. Currently, more attentions been paid low-cost high-efficiency optimal design piles. However, limitations method optimization for slope reinforced with still exist. In this paper, new multi-objective comprehensive was proposed The factor safety, internal force deflection were selected as indexes...

The Universal Distinct Element Code (UDEC) has been rising much prevalence and is a validated technique applied to simulations in varied branches of geotechnics. Nevertheless, the characterization water-weakening effects on rock model remains elusive, resulting poor constraint referring water-induced by UDEC. In this context, previous research attempting conduct an intuitive link between modelling parameters saturation degrees, Sr, implement process UDEC, leading detrimental potential devoid...

The concept of joint persistence has been widely used to study the mechanics and failure processes rock masses benefitting from simplicity statistical linear weighing discontinuity. Nevertheless, this term neglects scale effects bridges, meaning that same may refer different numbers spacings leading erroneous equivalent mass responses. To fill in gap, an intact bridge was dispersed as multi bridges while maintaining a constant persistence, subjected direct shear by conducting numerical...

Acoustic emission (AE) characterization is an effective technique to indirectly capture the progressive failure process of brittle rock. In previous studies, both experiment and numerical simulation were adopted investigate AE characteristics However, as most popular model, moment tensor model (MTM) did not reproduce monitoring analyzing manner signals from physical experiment. Consequently, its result could be constrained by experimental result. It thus necessary evaluate consistency...