Research and prospect of post-peak strain-softening characteristics of rocks

Abstract

The current research status and development trends are summarized in order to analyze the strain softening deformation characteristics of post-peak of rocks, and the corresponding key problems are found, the key issues included the influence of strain softening on tunnel engineering and the research status of strain softening in hydraulic engineering. Based on the existing researches, it is found that there are few studies on the deformation characteristics of post-peak of rocks, and there is a lack of damage constitutive model which can better describe the post-peak mechanical properties. At present, it is impossible to simulate the influence of rock softening on stiffness degradation in indoor tests, and there is also a lack of on-site construction measured data as support; at the same time, the surrounding rock control and protection technology under loading and unloading also urgently needs to be improved; in addition, the interaction mechanism between water and structure during rock softening with water needs to be further explored.

The Calculation of Inelastic Zone Width of Coal Pillar in Highwall Mining With Backfill

“…Many experts and scholars in the world have shown that the failure of rock mass is a complex progressive failure process through theoretical analysis (Ti, 2021;Xu et al, 2021), laboratory experiments (Yumlu and Ozbay, 1995;Tiwari and Rao, 2006;Zhang et al, 2022), and outdoor experiments (Zhang et al, 2021). Furthermore, it will generally experience three deformation stages: elastic deformation stage, plastic-softening deformation stage, and plastic-flow deformation stage, as shown in Figure 1.…”