Support characteristics of flexible negative Poisson’s ratio anchor cable response to blasting impacts

Yang, Xiao‐Jun; Wei, Ming; Gong, W. L.; Pan, Yuefeng; He, Manchao; Tao, Zhigang

doi:10.1016/j.undsp.2022.04.010

Cited by 8 publications

(1 citation statement)

References 10 publications

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“…Their results proved that anchors and C-shaped canals could improve the transverse shear capacity of supporting materials during the shear process and strengthen the axial ultimate bearing capacity of anchors. He et al [19], Yang et al [20], Ming et al [21], and Tao et al [22] studied the mechanical and supporting characteristics of anchors with negative Poisson's ratio (NPR) through field investigation and numerical simulation. Aziz et al [23] conducted a single-shear test of full-wrapping-type anchors and determined that the shear strength of spiral and groovetype anchors was lower than that of ordinary anchors and the peak shear load of anchors could be reduced by increasing the pre-tightening load.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of Protection Device for Anchor Cable Pull-Out in High-Stress Roadways

Guo,

Tu,

Dang

2023

Applied Sciences

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In regions with high-stress roadway stress, anchor cables frequently experience damage, leading to risky pull-outs and ejections. This study aimed to determine the dynamics of such incidents, refine protective devices, and validate their efficacy in enhancing safety. Drawing from an ejection accident in the 1632 (3) roadway of Pan San Mine, a combination of laboratory experiments, theoretical analysis, simulations, and field applications was utilized. The kinetic energy and speed of cable ejections were determined from single-axis tension test data. Based on these insights, a spring-based protection device was conceptualized. Subsequent experiments and simulations evaluated the energy absorption and deformation characteristics of these devices with different diameters. The results included the following: A cable, during ejection, moved at 48 m/s. Spring protective devices of 4 mm can absorb more energy than the 5 mm, but the anti-ejection effect is poor respectively. Increasing the device diameter improved its performance, especially in controlling spring deformation rate and preventing cable lock-ups. This devised protection mechanism showed promising results when implemented in the 1511 (1) roadway of Zhangji Mine.

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