Measurement and evaluation of hand-arm vibration exposure sourced from some power tools in mining workplaces [Maden işyerlerinde kullanilan bazi iş araçlarindan kaynaklanan el-kol titreşim maruziyetinin ölçümü ve de?erlendirilmesi]
This study includes measuring and then evaluating the hand-arm vibration exposure of mine workers. The research is supported by measurements taken from industrial establishments. The measurements were carried out using equipment and processes suitable to the relevant standards, which are specified in the Control of Vibration at Work Regulations issued by the Labor and Social Security Ministry of Turkey. For each tool/instrument the following vibration-related parameters were calculated: acceleration equivalent level (AEQ), equivalent vibration acceleration (A(8)), hourly exposure points (HEP), total exposure points (TEP), the dominant vibration acceleration frequency for each axis, time to reach the exposure action value (EAVTT) and time to reach the exposure limit value (ELVTT). Later, instruments/tools were grouped and then analyzed under the following four headings; instruments which perform similar functions, hand-held or hand-driven instruments/tools, performing a specific task by holding the tool/instrument or by holding and feeding a working object to the tool, and finally electricity or pressurized fluid driven tools. In all groups, compactors, drill tools of all types, high-speed grinders and cutters were found to cause extremely high levels of hand-arm vibration exposure, which would confine the time to reach to the exposure limit value within a few minutes.