Wear state assessment of conductors of mine vertical shafts
The downcast skip-cage mine shaft no. 2 of the mine 1 of the JSC “Belaruskali” mine management is used for the delivery of ore, men hoisting, materials and equipment lowering and lifting. As a result of disordered multiple replacements of worn-out conductors and reinforcement buntons, the axes of the conductors are curved, which leads to the formation of significant heterogeneity in the load and safety indicators of the reinforcement along the depth of the trunk and entails deformation of the conductors. The article considers the factors affecting the curvature of conductors. Graphs of conductor deviations in the frontal surface of the skip compartment of the trunk no. 2 of the mine 1 of JSC “Belaruskali” are constructed. It can be seen from the above graphs that due to the violation of the trunk geometry in the section of the rock movement zone, the verticality of the conductor system has significant violations. In addition, the conductor system has significant deviations from parallelism. Graphs of the displacements between the conductors are plotted. It can be seen from the graphs that in some areas the offset is greater than the permissible deviations.