Indicator assessment of the reliability of mine ventilation and degassing systems functioning

Abstract

The gas emission control in the mines is operated by ventilation and degassing systems that ensure the aerological safety of the mines or minimize the aerological risks. The ventilation system of the mine and its individual sites includes a significant number of technical devices and equipment, and the air tubes are mainly mining workings, the condition of which determines the quality of the ventilation network (its capacity) and depends on a number of mining factors. Similarly, one of the most important elements of the degassing system, which includes its own chain of technological equipment, are wells, and in some cases, mining workings. Thus, mine ventilation and degassing systems cannot be attributed to purely technical systems, since they include mining elements characterized by high variability of the determining parameters. To assess their reliability, it is necessary to use various combined methods that include additional characteristics in relation to the mining component. At the same time, the reliability of technical devices that ensure the functioning of mine ventilation and degassing systems largely determines the efficiency (stability and reliability) of these systems and, consequently, affects the level of aerological risks. The described approach to assessing the reliability of ventilation and degassing systems of coal mines when analyzing aerological risks is based on the developed system of risk indicators for the methane factor and will allow determining the risk dynamics in automatic mode based on monitoring the parameters of the ventilation and degassing system state.

The Choice of Optical Flame Detectors for Automatic Explosion Containment Systems Based on the Results of Explosion Radiation Analysis of Methane- and Dust-Air Mixtures

“…The research into the flame radiation spectrum and methane, air and dust mixtures' explosion radiation spectrum was carried out by photoelectric method and aimed to obtain data on the nature of radiation energy wavelength distribution. This method enables spectrum recording with automatic dark signal subtraction and spectrograph wavelength calibration [22,23].…”

Investigation of the Effect of Current Protections in Conditions of Single-Phase Ground Fault through Transient Resistance in the Electrical Networks of Mining Enterprises

“…The fulfillment of the requirements for a safe and reliable operation of the power supply system [20,21] directly depends on the state of the insulation of electrical installations. Timely detection of damage in 6-35 kV distribution networks and selective disconnection (selective protection) of damaged connections allow us not only to prevent the transition of SPGF to phase-to-phase short circuit, but also to significantly reduce the likelihood of electrical injuries to personnel.…”

Reliability of main fan coal mining plants

“…where p1 is the probability of fan duct reliability, p2the probability of reliability of fans with electrical engines, If the 1   system sensibility to failure is added to the mathematical model for determining the probability of system reliability, it is needed to multiply the probability of subsystem reliability with the appropriate sensibility . i  For achieving the optimal probability of system reliability it is possible to conduct the optimisation of hot reserved components in the subsystems or elements in the cold reserve [8].…”