黑龙江科技大学学报2024，Vol.34Issue(6)：839-846,8.DOI:10.3969/j.issn.2095-7262.2024.06.003
循环载荷下不同巷道形态砂岩变形破坏特征及声学特性
Deformation damage and acoustic characteristics behind sandstone under different shapes of tunnels by cyclic loading
摘要
Abstract
This paper is an effort to investigate the deformation and damage characteristics and acous-tic properties of the sandstone under different channel morphology by cyclic loading and unloading.The study works by using TAW-2000 press and SH-II acoustic emission system to conduct the uniaxial cyclic loading and unloading experiments on sandstone,and collecting the specimen with different morphological characteristics in different regions by static strain gauge.The results show that after cyclic loading and unloading of different morphology of the roadway,the uniaxial compressive strength decreases obviously.The hysteresis loop appears on the load-displacement curve and moves in the same direction with the curve,and the overall depression degree of the curve shows a positive correlation with the upper limit of the stress.The amount of deformation in the near field is obviously larger than that in the far field,and the axial strain is much larger than that in the radial strain.The holes in the circular channel morphology are most stable,but the holes in the arch-shaped channel are most unstable.The acoustic emission char-acteristics are obvious in the loading stage,and relatively reduced in the unloading stage.关键词
孔洞砂岩/循环加卸载/声发射/破裂形态Key words
porous sandstone/cyclic loading and unloading/acoustic emission/rupture morphology分类
矿业与冶金引用本文复制引用
刘刚,王盛旋,王冬伟,昝永龙,杨志涛,刘左成..循环载荷下不同巷道形态砂岩变形破坏特征及声学特性[J].黑龙江科技大学学报,2024,34(6):839-846,8.基金项目
黑龙江省自然科学基金资助优青项目(YQ2023E039) （YQ2023E039）
黑龙江省省属高等学校基本科研业务费项目(2022-KYYWF-0554) （2022-KYYWF-0554）
