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KMID : 0378019770200020113
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New Medical Journal
1977 Volume.20 No. 2 p.113 ~ p.122
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An Analytical Study on the Working environments of Coal mines in Gang-won province Area
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이종성/Lee, Chong Sung
맹광호/김응남/최영태/Meng, Kwang-ho/Kim, Eung Nam/Choi, Young Tai
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Abstract
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This study was carried out in 31 coal mines in Gang-won province area from April 1976 to September 1976 to assess the competence of their working environments.
For this, noise level, dust level, temperature, illumination, vibration, oxygen contents,, CO, and CO2 level, air velocity and humidity were checked. Discomfort index was also calculated. All the data obtained in this study were analyzed and discussed by three different type of work places (Rock Driving Face, Coal Face and Transport) and the size of plants. Major results of this study are as follows;
1) Among 1,830 spot observations randomly selected, 740 (or 40.43%) were not in competent level.
2) Noise level was over standard level at all Rock Driving Faces.
3) Dust level was extremely high in Rock Driving Faces and was still allowable level in Coal Faces and transport work places.
4) Temperature in general well controlled in all work places.
5) The range of illumination observed was 0 to 60 Lux. This was lower than standard illumination, 70 Lux.
6) The average oxygen contents in the air in all work places was competent but the proportion of incompetent places among all observations were 2.32% in Rock Driving Faces 18.18% in Coal Faces and 24.39% in transport work places.
7) The average CO2 and CO level in all work places were within standard level but 9.04% of all spot observations was over standard level for CO2 and 35.67% was over for CO.
8) Vibration checked in Rock Driving Faces showed the range of 0.01-14.13g. The places showed higher level than standard level (3g) was 29.62% among 27 spot observations.
9) Air velocity was poor in all work places.
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