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Whole-body Vibration Exposure of Drill Operators in Iron Ore Mines and Role of Machine-Related, Individual, and Rock-Related Factors
Safety and Health at Work ; : 268-278, 2015.
Artigo em Inglês | WPRIM | ID: wpr-16913
ABSTRACT

BACKGROUND:

This study aimed to assess the whole-body vibration (WBV) exposure among large blast hole drill machine operators with regard to the International Organization for Standardization (ISO) recommended threshold values and its association with machine- and rock-related factors and workers' individual characteristics.

METHODS:

The study population included 28 drill machine operators who had worked in four opencast iron ore mines in eastern India. The study protocol comprised the following measurements of WBV exposure [frequency weighted root mean square (RMS) acceleration (m/s2)], machine-related data (manufacturer of machine, age of machine, seat height, thickness, and rest height) collected from mine management offices, measurements of rock hardness, uniaxial compressive strength and density, and workers' characteristics via face-to-face interviews.

RESULTS:

More than 90% of the operators were exposed to a higher level WBV than the ISO upper limit and only 3.6% between the lower and upper limits, mainly in the vertical axis. Bivariate correlations revealed that potential predictors of total WBV exposure were machine manufacturer (r = 0.453, p = 0.015), age of drill (r = 0.533, p = 0.003), and hardness of rock (r = 0.561, p = 0.002). The stepwise multiple regression model revealed that the potential predictors are age of operator (regression coefficient beta = -0.052, standard error SE = 0.023), manufacturer (beta = 1.093, SE = 0.227), rock hardness (beta = 0.045, SE = 0.018), uniaxial compressive strength (beta = 0.027, SE = 0.009), and density (beta = e1.135, SE = 0.235).

CONCLUSION:

Prevention should include using appropriate machines to handle rock hardness, rock uniaxial compressive strength and density, and seat improvement using ergonomic approaches such as including a suspension system.
Assuntos

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Vértebra Cervical Áxis / Vibração / Análise Multivariada / Força Compressiva / Aceleração / Dureza / Índia / Ferro Tipo de estudo: Estudo prognóstico / Pesquisa qualitativa País/Região como assunto: Ásia Idioma: Inglês Revista: Safety and Health at Work Ano de publicação: 2015 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Vértebra Cervical Áxis / Vibração / Análise Multivariada / Força Compressiva / Aceleração / Dureza / Índia / Ferro Tipo de estudo: Estudo prognóstico / Pesquisa qualitativa País/Região como assunto: Ásia Idioma: Inglês Revista: Safety and Health at Work Ano de publicação: 2015 Tipo de documento: Artigo