煤矿安全2023，Vol.54Issue(12)：175-181,7.DOI:10.13347/j.cnki.mkaq.2023.12.021
侧向渗透-轴向承载下煤样破坏及水-力耦合作用机制
Mechanism of coal sample failure and water-force coupling under lateral permeation-axial load
摘要
Abstract
The characteristics of deformation and failure of coal pillar under goaf water infiltration and overburden load is complex.In order to study the deformation characteristics of coal pillar under the action of lateral permeation-axial load,a unilateral hydraulic loading device for the permeability test of cylindrical specimens was used to carry out compression tests of coal samples under dif-ferent lateral permeation pressures and to study the failure characteristics and permeability characteristics of coal samples.The res-ults show that:the deformation and failure of coal samples under lateral permeation-axial load can be divided into five stages:com-paction,elasticity,stable fracture expansion,unstable fracture expansion and post-peak failure.With the increasing of lateral water pressure,the peak strength of coal samples gradually decreases,and the axial strain corresponding to the stable fracture expansion stage decreases.The water energy enters the inner void of coal sample under small axial strain,resulting in increased brittleness of coal sample and accelerated failure of coal sample.关键词
采空区/邻空煤柱稳定性/煤样试件/侧向渗透/单轴压缩/破坏特征/渗透特性Key words
goaf/stability of coal pilar near goaf/coal specimen/lateral penetration/uniaxial compression/failure characteristic/permeability characteristic分类
矿山工程引用本文复制引用
刘祥龙,江东海..侧向渗透-轴向承载下煤样破坏及水-力耦合作用机制[J].煤矿安全,2023,54(12):175-181,7.基金项目
山东省自然科学基金青年基金资助项目(ZR2021QE176) （ZR2021QE176）
