Bao Liu, Jialu Liu
This paper addresses the issue of changes in magnetic field distribution caused by different coiling methods during the recovery of high-voltage cables in fully mechanized coal mining face underground. We used simulation software to analyze the magnetic field distribution of three-core cables under different coiling states. The results show that the magnetic field under multi-loop circular coiling exhibits a complex three-dimensional non-axisymmetric structure, while in figure-8 coiling, the magnetic field is enhanced due to superposition at the central intersection point where the current directions are the same. The magnetic field strengths at the center of the coils are similar for both coiling methods, but differences exist in the lateral magnetic field distribution. This study provides a theoretical basis for the safe recovery of cables and the evaluation of magnetic field effects.
Underground coal mine; Three-core cable; Finite element; Electromagnetic radiation