The Anti-Impact Characteristics of Cables under Impact Load

Xiaoyong Lian (), Jun Li, Housheng Jia and Peng Ding
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Xiaoyong Lian: School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Jun Li: School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Housheng Jia: School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
Peng Ding: Uroica (Shandong) Mining Technology Co., Ltd., Tai’an 271000, China

Energies, 2023, vol. 16, issue 2, 1-17

Abstract: The cable plays a vital role in roadway support. As the last barrier to prevent roof collapse and impact disaster accidents, it is of great significance to study stress characteristics of cables under impact dynamic load to guide the rock burst roadway support. With high-strength cables of Φ21.6 and Φ21.8 mm and low-resistance high-extension cables of Φ21.5 mm as examples, this paper studied the instantaneous mechanical state and energy dissipation characteristics of different types of cables under impact loads by using impact testing machines and high-frequency data acquisition system. The results show that the impact process can strengthen the strength of the cable. The strength and elongation of anchor cables are a pair of characteristic indexes with an inverse relationship. Simply increasing one index cannot improve the overall impact resistance of the cable. To quantitatively characterize the impact resistance and energy absorption effect of cables, the impact resistance index k was introduced. The smaller the index, the better the energy absorption effect of cables. In the process of dynamic load impact of high-strength cable, about 43.7% of the total energy is dissipated disordered in the form of mechanical energy. The dynamic load impact process of low-resistance and high-extension cables is similar to the viscoelastic impact. In the collision compaction stage, the force of the cable is basically constant. Most of the impact energy is absorbed or transformed by the cable, about 17.7% of which is mostly dissipated in the form of mechanical energy. The disordered dissipated mechanical energy is less, so the impact resistance and energy absorption effect of this cable are better. The cable plays an important role in the process of bearing the dynamic load of surrounding rock. The anti-impact performance index of cables should be considered in dynamic load impact roadway support design.

Keywords: gravitational potential energy; impact load; cable; impact energy; elongation ratio; internal energy; mechanical energy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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