FIELD: mining.
SUBSTANCE: invention relates to technical investigation of reliability of mechanical structure and can be used in mining to assess performance of mine hoisting equipment. Disclosed is method of estimating reliability of mine shaft hoisting system with elevator in kilometer mines with due allowance for several modes of failure, including the following stages: stage 1 of determination of average values and deviations of overall dimensions, characteristics of materials and external load on mine shaft with elevator and determination of types of distribution of these parameters; step 2 of compiling a three-dimensional parametric mine model based on its structural parameters and importing a three-dimensional parametric mine shaft model into a finite element method for performing statistical analysis; step 3 of compiling a random sample matrix for the main parameters based on their average values and deviations calculated at step 1 using the sampling method; step 4 of compiling several new three-dimensional models of mine shaft by values from each row of the random sampling matrix and obtaining a new sample for the stress / deformation profile using finite element analysis; step 5 of matching a random sampling matrix and voltage / strain profile values using a neural network and obtaining a function describing the relationship between the strain / strain profile for the shaft and the structural characteristics; step 6 of separately calculating the reliability function for the failure mode in strength and for the stiffness failure mode for the mine shaft with the elevator; calculating moments of third and fourth orders for main parameters by mean values and deviations; calculation of moments of the third and fourth orders for established functions and determination of failure probability separately on strength and probability of rigidity failure by pass method; step 7 of obtaining a correlation coefficient between failure in strength and failure in stiffness using a statistical method, determining joint distribution of failures by both strength and rigidity using Clayton copula and calculating the failure probability of the lifting system in case of failure correlations using a combined reliability determination method.
EFFECT: technical result is higher efficiency of lifting system in kilometer mines.
5 cl, 4 dwg
