Dynamic mechanical characteristics and engineering application of high elongation anchor cable

• Published in: Méitàn kēxué jìshù Vol. 52; no. 2; pp. 49 - 62
• Main Authors: Yukai FU, Yongzheng WU, Penghe ZHOU, Zhuoyue SUN, Junchen LI
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Coal Science and Technology 01.02.2024
• Subjects: bolt support; deep roadway; drop hammer; high elongation anchor cable; rock burst
• ISSN: 0253-2336
• DOI: 10.12438/cst.2023–0093

The traditional anchor cable has low elongation, poor impact resistance, and is prone to brittle fracture failure under strong impact load, leading to roof fall, rock burst accidents and other problems in the roadway. Based on this, the anchor cable with high strength, high elongation and high impact resistance was independently developed. The static and dynamic mechanical properties of the anchor cable with high elongation were analyzed by laboratory tests, theoretical analysis and field tests. The differences between high elongation anchor cable and ordinary anchor cable in chemical composition, metallographic structure and inclusion are also studied. Finally, the energy absorption principle of high elongation anchor cable support is proposed, and the high elongation anchor cable is applied in the field. The results show that: Under static load, the tensile strength of high elongation anchor cable is 1790 MPa, the total elongation of maximum force is 8.1%, which is 1.61−2.25 times of that of ordinary anchor