摘要
为探究在不同锚固参数条件下锚杆对深部巷道围岩拉剪复合破裂的控制作用,通过对准平面应变条件下不同锚固参数锚固体试件展开单侧临空加载试验,对比分析了不同锚固间距与锚固角度条件下锚固体拉剪破裂演化及变形特征。研究表明,水平锚固与倾斜锚固2种锚固方式均可有效提升试件的抗变形能力,对试件的变形破坏有明显抑制作用;水平锚固可以有效抑制试件张拉破裂,并在一定范围内随锚杆间距的减小抑制作用逐渐提升;倾斜锚固对试件剪切破裂抑制作用更加明显,且在倾斜锚固过程中存在最优锚固角度。此次试验为进一步展开研究提供了理论参考。
To explore the control effect of bolt on tensile-shear composite fracture of surrounding rock in deep roadway under different anchoring parameters,the unilateral free-face loading test was carried out on the anchor solid specimens with different anchorage parameters under the quasi-plane strain condition,and the tensile-shear fracture evolution and deformation characteristics of anchor solid under different anchorage spacing and anchorage angle were compared and analyzed.The results showed that both horizontal anchorage and inclined anchorage could effectively improve the deformation resistance of the specimen,and had a significant inhibitory effect on the deformation and failure of the specimen.Horizontal anchorage could effectively inhibit the occurrence of tensile fracture of specimens,and the inhibitory effect gradually increased with the decrease of bolt spacing within a certain range.Inclined anchorage had more obvious inhibitory effect on shear failure of specimens,and there was an optimal anchorage angle in the process of inclined anchorage.This experiment provided a theoretical reference for further research.
作者
高帅
续培东
胡佳琦
张顺
徐振铭
Gao Shuai;Xu Peidong;Hu Jiaqi;Zhang Shun;Xu Zhenming(School of Mining and Geomatics Engineering,Hebei University of Engineering,Handan 056038,China)
出处
《煤炭与化工》
CAS
2023年第3期1-5,10,共6页
Coal and Chemical Industry
基金
河北省自然科学基金项目(E2020402048)。
关键词
锚固机理
锚固体
准平面应变
拉剪破裂
anchoring mechanism
anchor solid
quasi-plane strain
tensile-shear fracture
