Study on Anchored Red Sandstones Creep Characteristic Test and its Constitutive Model
In order to reveal deformation laws of anchored rock under long-term loads, in this paper, creep mechanical characteristics of anchored rock are analyzed, and anchorage constitutive model considering time effect is initially studied based on laboratory tests. Red sandstone of good homogeneity is used as anchored matrix, bamboo as the anchor, mixture of barite powder and rosin alcohol as the binder, then anchored red sandstone is made according to the similar criteria. Non-anchored and anchored specimens indoor long-time (above 100h) creep test is conducted by RLJW-2000 rheology tester, The results show that, creep stress threshold of anchored rock is increased by about 30％σc, creep deformation at different stress level stage is significantly controlled, and anchored specimens long-term intensity is increased by 5％~10％σc, which still has some capacity after destroyed. In addition, starting from the overall mechanical effect of anchors reinforcement to rock, according to equivalent co-deformation principle, one-dimensional creep constitutive equation of anchored rock is established, the answer of anchored generalized Kelvin (B-K) model is derived and control mechanism on creep deformation of rock by bolt is analyzed.
Anchored rock Creep test Co nstitutive B-K model Anchoring effect
ZHAO Tongbin TAN Yunliang LIU Shanshan CHEN Yunjuan ZHAO Zhigang
Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technolog College of Resources and Environmental Engineering, Shandong University of Science and Technology, Q Jinan Time Assay Testing Machine Co., Ltd. Jinan, Shandong 250000, China Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technolog
国际会议
2010 International Conference on Mine Hazards Prevention and Control(第二届矿山灾害预防与控制国际学术会议 ICMHPC)
青岛
英文
83-89
2010-10-15（万方平台首次上网日期，不代表论文的发表时间）