2026-10-13T20:22:31Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33815209 2026-09-15T18:05:07Z category_1 category_7 category_272 category_39 category_734 category_106 portal_5 item_type_3 month_year_09_2026

<p>Model parameters.</p> Yonghui Zhang (279832) Fangtao Li (5730533) Biophysics Medicine Environmental Sciences not elsewhere classified Ecology Biological Sciences not elsewhere classified Science Policy stress &# 8209 pore water pressure fractured rocks subjected unified strength theory microelement strength follows statistical damage model critical damage threshold promotes rock failure damage threshold statistical variable overall strength xlink "> weibull distribution thereby establishing test curves study provides safety analysis results show quantitatively characterize mechanical responses finally validated effectively reflecting <div><p>A statistical damage model incorporating multifractal characteristics is proposed for micro-fractured rocks subjected to pore water pressure. Based on the assumption that microelement strength follows a Weibull distribution, the unified strength theory is adopted as the statistical variable, and a relative fractal dimension λ is introduced to quantitatively characterize the heterogeneity and anisotropy of the material, thereby establishing a statistical damage model for the rock, which is finally validated through experiments. The results show that: (1) The model predictions agree well with test curves, effectively reflecting the mechanical responses under varying pore water pressures; (2) Increasing pore water pressure accelerates damage evolution, lowers the critical damage threshold, and promotes rock failure; (3) A larger relative fractal dimension λ reduces microelement strength concentration, brittleness, damage threshold, and overall strength, making the rock more prone to instability. This study provides a reference for safety analysis of rock engineering under stress‑seepage coupling conditions.</p></div> 2026-09-15T18:04:57Z Dataset Dataset 10.1371/journal.pone.0358254.t001 https://figshare.com/articles/dataset/_p_Model_parameters_p_/33815209 CC BY 4.0