高压物理学报2025，Vol.39Issue(6)：31-45,15.DOI:10.11858/gywlxb.20240919
CFRP部分包裹煤圆柱的约束机制与力学特征
Constraint Mechanism and Mechanical Characteristics of CFRP Partially Wrapped Coal Columns
摘要
Abstract
Carbon fiber-reinforced plastic(CFRP)wrapping is a promising technique for enhancing the structural integrity of coal columns.When applied to coal columns in roadway environments,CFRP reinforcement offers significant advantages over unreinforced columns.Specifically,the compressive strength of coal columns subjected to triaxial compression is markedly higher than that of columns subjected to uniaxial compression,primarily due to the restricted lateral expansion in the former case.This study investigates coal column specimens with varying CFRP layer configurations and net spacing ratios,evaluating mechanical properties such as stress-strain behavior,peak strength,and ultimate strain through uniaxial compression testing.The research explores the impact of CFRP confinement on the mechanical performance and damage modes of coal columns under different conditions.The results indicate that coal columns confined by CFRP strips or fully wrapped with CFRP exhibit similar mechanical behaviors.CFRP strip confinement provides a notable strengthening effect under uniaxial compression,with peak strength and deformation resistant capacity significantly improved as the net spacing ratio decreases and the number of CFRP layers increases.Additionally,the CFRP reinforcement effectively mitigates lateral expansion,alters the failure mode,and delays the onset of damage.Furthermore,using the Richart and Hoek-Brown models,the study incorporates the test data for model refinement and comparative analysis,leading to the development of a modified Richart strength model for CFRP-constrained coal columns.关键词
碳纤维增强复合材料/煤圆柱/净间距比/环向应变/强度模型Key words
carbon fiber-reinforced plastic/coal column/net spacing ratio/hoop strain/strength model分类
力学引用本文复制引用
李庆文,李玲,潘创创,钟宇奇,聂帆帆,杨浩..CFRP部分包裹煤圆柱的约束机制与力学特征[J].高压物理学报,2025,39(6):31-45,15.基金项目
辽宁省教育厅基本科研面上项目(JYTMS20230866) （JYTMS20230866）
辽宁省自然科学基金面上项目(2023-MS-298) （2023-MS-298）
辽宁省博士科研启动基金(2019-BS-120) （2019-BS-120）
辽宁省自然科学基金指导项目(20180550297) （20180550297）
