Coal Mine Subsided Water Quality Assessment and Subsided Water Resource Comprehensive Utilization Analysis A Case of Subsided Water Area in Panyi Coal Mine

In order to provide the theoretical basis for comprehensive utilization of coal mine subsided water resource in Huainan coal mine, 39 water sampling points in two typical subsided water areas of Panyi coal mine are chosen to monitor the water quality by sampling, the heavy metal elements of water body are analyzed and the fuzzy synthetic evaluation technique is used to analyze the water quality comprehensively. The results show that the water quality of well closed subsided water area in the west presents a decreasing tendency from the center of the water body to both banks, the water quality of the center profile is grade III; But the water quality of the subsided water area in the east that is connected with Nihe River is relatively poor and water qualities of all monitored profiles are all grade IV or V. Due to the influence of polluting sources from mining industries, the pollution intensity of heavy metal elements in the east subsided water area is more serious than the west subsided water area. The subsided water areas of Panyi coal mine are polluted in different degree, but they can be comprehensively utilized if they are protected and corresponding treatment measures are adopted.