Optimal Dynamic Management of Exploitation Life of the Mining Machinery: Models with Undefined Interval

The paper is focused on the problem of determining the optimal exploitation life of the long-lasting mining machinery, such as bucket-wheel excavators, excavators with one working element of large capacity, spreaders, self-propelled transporters, conveyor belts and similar machinery. A concept of approach is presented, and an application of the dynamic model with the undefined interval is given by using the example of the bucket-wheel excavator. The paper concludes with observations and assessments regarding the subject matter.