EVALUATION OF ENVIRONMENT QUALITY OF GOAF WATER OF YUNGANG MINING AREA IN DATONG SHANXI, CHINA.

In order to alleviate water shortage in Yungang Mining Area of Datong, Shanxi, China, we intend to make use of water in goaf. In this paper, samples and water quality tests were carried out on the goaf water of Qingciyao mine, Jiangjiawan mine, Jinghuagong palace and Yungang mine in Yungang Mining Area. And the method of single factor pollution index, principal component analysis and improved Nemerow synthetic pollution index method were used to evaluate the environmental quality of the water in the goaf. Results showed that, BOD5, Total Iron, Ammonia Nitrogen and Total Phosphorus are the main contaminant in the four coal mines, and water quality of goaf in Qingciyao mine is the best with the Pi (Nemerow synthetic pollution index) value is 1.15 and the comprehensive principal component is -0.38. The water quality of Yungang is the worst since Pi value is 5.3 and 4.7 respectively, and the comprehensive main component is 1.54 and 1.55. But through proper treatment, the goaf water of Yungang Mining Area can reach the national standard of landscape recreation water. [ABSTRACT FROM AUTHOR]