Performance Evaluation of Heading-and-Winning Machines in the Conditions of Potash Mines

Abstract

The authors focus on the process of potash ore production by a mechanized method. They show that currently there are no approved procedures for assessing the performance of heading-and-winning machines operating in the conditions of potash mines. This causes difficulties in determining the field of application of heading-and-winning machines, complicates the search for implicit technical solutions for the modernisation of existing models of mining units, prohibits real-time monitoring of the stability of stope-based technological processes and makes it difficult to assess the performance of the services concerning mining enterprises. The work represents an aggregate assessment of the performance of heading-and-winning machines for potash mines by determining complex indicators describing the technological and technical levels of organising the work in stopes. Such indicators are the coefficients of productivity and energy efficiency, respectively. Experimental studies have been carried out in the conditions of the potash mine of the Verkhnekamskoye potassium-magnesium salt deposit to assess the performance of the latest and most productive Ural-20R heading-and-winning machines manufactured in Russia. Using the above methodological approaches, this paper shows that the unsatisfactory technological performance of the studied machine is due to the low productivity of the mine district transport. The average productivity coefficient was 0.29. At the same time, high values of the energy efficiency coefficient show that the productivity of the machine is on par with design conditions.

A Soft Sensor for Measuring the Wear of an Induction Motor Bearing by the Park’s Vector Components of Current and Voltage

“…The first is that only two current sensors (Hall-effect compensated current sensors) are required to detect faults, as shown in Figure 16. The third phase current is determined indirectly [37][38][39]. Further analysis of the method has highlighted a number of advantages.…”

“…The first is that only two current sensors (Hall-effect compensated current sensors) are required to detect faults, as shown in Figure 16. The third phase current is determined indirectly [37][38][39]. The second is achieved by a synchronous recording of the phase voltage currents (uA, uB, uC), which eliminates the influence of mains distortion.…”

Efficiency Increase of Energy Systems in Oil and Gas Industry by Evaluation of Electric Drive Lifecycle

“…Total influence of alternating moments on the resulting AM electromagnetic moment is determined by the coefficient for pulsations of the electromagnetic moment K p (10). To take into account the effects of the multicomponent harmonic composition caused by both the converter and the AM defects, with regard to (8) and ( 9), it is necessary to divide the total coefficient of pulsations ∑Kp into components K p and K p * (11).…”

“…An algorithm for ANN operation was compiled based on Equation(10). It took into account the system operation, which evaluates the possibility of failure-free functioning for analyzed electric and vibration AM characteristics using ANN.The input of a neuron network included a block for generating training data and a block for creating an ANN.…”

Investigation of the Effectiveness of an Augmented Reality and a Dynamic Simulation System Collaboration in Oil Pump Maintenance

“…Not all plants can have the necessary equipment reserve at all process units. There are many developments with recommendations for the introduction and implementation of systems that provide technological maintenance for equipment based on preventive methods [3,4]. For example, [5] describes a methodology for planning the maintenance of pumps at existing thermal power plants.…”