Assessment of noise impact on coal mine workers including way to/from workplace

Abstract

Purpose. Determination of the noise induced permanent threshold shift for a coal miners in five main working professions, taking into account the noise impact on the way to the workplace and back based on data obtained from personal sound level meters. Methodology. A strategy is selected for measuring the level of noise exposure at workplaces No. 3 per workday (GOST ISO 9612-2016) in a coal mine. Personal sound level meters were attached to the miners shoulders; they measured the noise level on the way to the workplace, during the work shift (8 hours) and on the way back. The processing of the measurement results was carried out on the basis of a quantitative assessment of the noise impact on workers according to the noise induced permanent threshold shift (NIPTS). The NIPTS values were calculated for a period from 3 to 30 years for 5 main professions, taking into account the noise impact when moving to the workplace and back. Findings. The values of the equivalent noise level at miners workplaces of are determined, which are 15 to 20 dBA above the maximum permissible equivalent level (80 dBA). Based on the results obtained, a constant shift in the hearing threshold was forecast for workers of five occupations with seniority of 3 to 30 years. A reduction in the hearing threshold of a sinker will amount to 25 dB in 30 years, which corresponds to the occupational disease Stage 3. Originality. Constant displacement of the hearing threshold for workers in coal mines, caused by the effect of an increased noise level during the journey to the place of work and back, was revealed. Practical value. It was found that in order to prevent the development of an occupational disease (sensorineural hearing loss) in underground miners, it is necessary to measure the noise level by using personal sound level meters for an 8-hour working day, taking into account the way time to the workplace and back. Noise exposure assessment should be based on a continuous decrease in the hearing threshold.

Pérdida auditiva y exposición laboral a ruido en minería: una revisión sistemática

“…• Se encontró una diferencia significativa entre trabajadores subterráneos y en superficie, presentando los primeros mayor prevalencia de pérdida auditiva (Chi cuadrado, p<0.01). • El grupo de edad más joven (20)(21)(22)(23)(24)(25)(26)(27)(28)(29) presentó la prevalencia más alta de pérdida auditiva inducida por ruido (60%). • El grupo con >10 años de experiencia fue el más afectado por la pérdida auditiva inducida por ruido (72%) y también con mayor proporción de audición pobre (37%, Chi cuadrado, p<0.05) Nikulin et al .…”

“…• El grupo con >10 años de experiencia fue el más afectado por la pérdida auditiva inducida por ruido (72%) y también con mayor proporción de audición pobre (37%, Chi cuadrado, p<0.05) Nikulin et al . (28) 2021 Rusia Transversal Trabajadores en una mina de carbón.…”

“…También son escasos los artículos en los que se detallan las fuentes de financiación o los posibles conflictos de intereses, concretamente 6 de 13 artículos totales, es decir, menos de la mitad (21)(22)(23)(24)(25)29) . Un número no desprecia-ble de artículos carece de limitaciones detalladas en su texto (20,24,25,28,(30)(31)(32) . La calidad documental no es sinónimo de calidad de la evidencia pero la ausencia de la primera hace cuestionar la segunda.…”

An analysis of factors influencing the development of self-employment digitalization based on fuzzy logic

“…Digital platforms (digital knowledge platforms, freelancing exchanges) are suitable for finding on-demand work according to the outsourcing model and relate to microentrepreneurship in the field of intellectual labour. Digital platforms are based on the following principles: digitalization [42][43] (tracking all interactions for later analysis; offline transactions are eliminated), social networking (user relationships based on common node traits), contracting and knowledge work (flexible assessment of requirements and complexity; agreement, contracting and execution) [2], mutual trust [44][45]. Platforms coordinate work planning within project tasks and allow for arbitration when disputes arise [46].…”

Analysis of the methodology for calculating the dose of external radiation exposure of the population

“…When exposed to the population and personnel of unfavorable factors, it is necessary to calculate their safe values to ensure safety [16,17]. The aim of the work is to analyze the methods of calculating the doses of radiation exposure to the population, considering the possible accumulation of doses of external radiation.…”