矿业科学学报2025，Vol.10Issue(2)：163-172,10.DOI:10.19606/j.cnki.jmst.2024913
锚固角度对节理岩体动态压剪响应的影响研究
Effect of anchorage angle on dynamic compression-shear response of jointed rock mass
摘要
Abstract
This study aims explore the effect of different anchorage angles on the dynamic mechanical properties of jointed rock mass and the failure behavior of anchorage body.We conducted the dynamic load impact test on fully anchored jointed rock mass with anchorage angles of 15°,30°,45°,60° and 75° by using the split Hopkinson pressure bar system to analyze the dynamic stress and strain of an-chored rock mass,the strain of anchored bolt and the sliding compression-shear behavior of anchored matrix under different anchorage angles.Results show that with the increase of anchoring angle,the peak stress of anchorage body demonstrate initial increase and subsequent decrease,namely 15.8,18.1,20.9,24.7 and 23.3 MPa,respectively.The dynamic stress-strain curve of anchorage body un-der compression and shear resistance of anchor rod exhibits a"double peak"shape.Under the com-pression-shear behavior of rock mass,the axial strain of bolt shows a decreasing trend,and the strain rate of bolt decreases with the increase of angle at the moment of impact.The strain amplitude moni-tored by strain gauges on the left and right sides of joint surface is close to each other at 45° anchoring angle.The displacement of the loading end of the anchorage body decreases gradually along the impact direction,namely 4.84,1.71,1.40,1.01 and 0.84 mm,respectively.The ability of the bolt is grad-ually enhanced to resist the compression-shear slip of the anchorage body along the joint surface.关键词
锚固角度/贯通节理/应力/锚杆应变/滑移压剪Key words
anchoring angle/through joint/stress/anchor strain/slip pressure shear分类
矿山工程引用本文复制引用
殷志强,张驰,张志雄,齐潮,章新生,曹坤..锚固角度对节理岩体动态压剪响应的影响研究[J].矿业科学学报,2025,10(2):163-172,10.基金项目
国家自然科学基金(52274070,52227901) （52274070,52227901）
安徽理工大学研究生创新基金项目(2023CX2034) （2023CX2034）
2024广西应急管理联合创新科技攻关项目(2024GXYJ033) （2024GXYJ033）
