煤炭与化工2025，Vol.48Issue(7)：37-40,51,5.DOI:10.19286/j.cnki.cci.2025.07.008
单轴压缩下节理岩体预应力锚固强化效应研究
Study on prestressed anchorage strengthening effect of jointed rock mass under uniaxial compression
摘要
Abstract
In order to study the influence of prestressed anchor on the mechanical properties and fracture morphology of jointed sandstone,the mechanical properties and fracture characteristics of anchored jointed sandstone were analyzed by uniaxial compression test.The results show that the post-peak stress-strain curve of anchored jointed rock mass shows a slow downward trend,and the bearing capacity is significantly improved.The anchoring position has a significant effect on the improvement of strength and elastic modulus.The strength gain ratio and elastic modulus gain ratio under LC-2 condition reach the maximum values(0.134 and 0.248),and the anchoring effect is the best.The crack propagation analysis shows that the crack propagation of the anchored rock is stagnant and does not develop to the end of the specimen,and the bolt has the strongest inhibition effect on the crack under the LC-2 working condition.The research reveals the influence of bolt position on the mechanical properties and fracture morphology of jointed rock mass,which provides a theoretical basis for the stability control and support optimization of surrounding rock in coal mine roadway.关键词
节理岩体/预应力锚杆/锚固位置/单轴压缩试验/力学性能/破裂特征Key words
jointed rock mass/prestressed anchor/anchorage position/uniaxial compression test/mechanical properties/fracture characteristics分类
矿业与冶金引用本文复制引用
胡佳琦,张顺,黄政文,李会园..单轴压缩下节理岩体预应力锚固强化效应研究[J].煤炭与化工,2025,48(7):37-40,51,5.基金项目
河北省研究生创新资助项目(CXZZSS2024102) （CXZZSS2024102）
