International Journal of Frontiers in Engineering Technology, 2023, 5(12); doi: 10.25236/IJFET.2023.051216.
Mengxiang Ma1, Yunhai Cheng
1Department of Mining Engineering, Anhui University of Science and Technology, Huainan, China
Aiming at the impact damage problem of anchorage structure under the condition of superimposed dynamic and static loads, based on the solution of Kelvin elasticity problem, an analytical model of anchor force under the joint action of pre-stretching static load and blasting dynamic load is established, and based on the reflecting and transmitting process of the stress wave between the anchorage and free sections of the anchorage, an analytical model of the force of end-anchored anchorage under the joint action of pre-stretching static load and blasting dynamic load is put forward, and the corresponding damage is given. The analytical model is proposed and the corresponding damage form is given. It is found that due to the different wave impedance of the free section, the anchored section and the roadway surface, the axial stresses superimposed on the anchors at different locations are different. Meanwhile, due to the complex nature of the surrounding rock, the differences in anchor rods and anchor materials, and the construction errors, the damage forms of the anchorage bearing structure are different.
dynamic and static loads, anchor solid, Impact dynamic load
Mengxiang Ma, Yunhai Cheng. Damage mechanism and evidence of anchor solid under static and dynamic loading conditions. International Journal of Frontiers in Engineering Technology (2023), Vol. 5, Issue 12: 106-110. https://doi.org/10.25236/IJFET.2023.051216.
[1] ZHANG Jianchao, HE Jianqing, JIANG Xin. Force analysis of anchorage section of tension type anchor based on Kelvin solution [J]. Mining and Metallurgical Engineering, 2012, 32(4): 16-19
[2] You Chun'an. Force analysis of full-length bonded anchors[J]. Journal of Rock Mechanics and Engineering, 2000(3): 339-341.
[3] ZHAO Minghua, LIU Sisi, HUANG Lixiong, et al. Numerical simulation calculation of pressure anchor based on energy principle[J]. Journal of Geotechnical Engineering, 2011, 33(4): 529-534.
[4] HUANG Liuyun, ZHANG Peng, ZHANG Shengli. Mechanical analysis of anchored section of CFRP anchors based on Kelvin solution[J]. Journal of Guangxi University (Natural Science Edition), 2013, 38(3): 696-702.
[5] WANG Mingshu, HE Xiuren, ZHENG Yutian. Mechanical modeling of full-length anchors and its application [J]. Metal Mining, 1983(4): 24-29.
[6] YANG Gengshe, HE Tangyong. Pallet effect of full-length anchors[J]. Journal of Rock Mechanics and Engineering, 1991(3): 236-245.
[7] WANG Wenjie, MA Xiongzhong, ZOU Changfu, et al. Tests and problems of FRP anchor support in Jinshandian iron mine[J]. Metal Mining, 2012(10): 1-4+8.