Theoretical Study of the Extending Electric Cable Operation

It is shown that electrical cable systems used in mining areas experience heavy loads from their own weight, and can also be subjected to mechanical damage as a result of shifting rock layers. This leads to emergency situations at mining enterprises, which threatens the maintenance personnel lives. To compensate for tensile stresses leading to wire breakage, extension sleeves of various designs are installed on the cables. A study was made of loading schemes for sleeve flat and shell elongating elements, which showed that the shell element is a more effective component. Due to the calculation and selection the element cylindrical stiffness and of the meridian inclination angle to the symmetry axis, the best elongation effect can be achieved.