A novel structural model for strainburst hazard considering the surrounding rock-burst volume interaction and its use to obtain a strength criterion for strainbursts

Deformation characteristics and novel strain criteria of strainbursts induced by low‐frequency cyclic disturbance

“…This rockburst testing system, developed by professor Su et al (Su, Jiang, et al, 2017; Su, Zhai, et al, 2017) at Guangxi University, China, is composed of the main testing machine, a dynamic disturbance system, a data acquisition system, a high‐speed camera monitoring system, and an acoustic emission (AE) monitoring system (Figure 1). The strainburst experiments performed in this study are actually structural model tests because a strainburst is usually regarded as a structural failure (instability) of a large volume of rock mass in a high‐stress state near the excavation boundary in the strainburst experiments conducted before (Hu, Li, et al, 2020; Liang et al, 2022; Su, Hu, et al, 2017; Su, Jiang, et al, 2017; Su, Zhai, et al, 2017). The surrounding rock‐burst volume interaction was considered, hard rock samples with relatively large sizes (100 mm × 100 mm × 200 mm) were used to represent the burst volume, and the testing machine was used to represent the surrounding rock.…”

“…Rockbursts are extremely dangerous in that they seriously hamper the safety of deep rock engineering. In recent decades, great efforts have been made by researchers to study rockbursts (Cai & Kaiser, 2018; Cook, 1965; Feng et al, 2018; He et al, 2010, 2012; Hu, 2017; Hu, Li, et al, 2020; Hu et al, 2021; Hu, Su, et al, 2020; Liang et al, 2022; Ortlepp & Stacey, 1994; Su, Feng, et al, 2017; Su, Hu, et al, 2017; Su, Jiang, et al, 2017; Su, Zhai, et al, 2017). In general, rockburst can be classified into strainbursts, pillar‐bursts, and fault‐slip bursts, among which strainburst is the most commonly seen.…”