The Occurrence Characteristics And Protection-utilization Countermeasure Of Groundwater's Protecting Target Layer In The Main Coal-mining Area Of Shaanxi Province

As the rapid development of coal-mining industry in resent year, the contradiction between the energy exploration and the water resource request were increasingly aggravation, and more groundwater were utilized by the coal mining area. So, based on the right understanding about groundwater resources, the implement of proper protection and utilization countermeasure is now becoming an important subject for the groundwater science.In this paper, the groundwater's occurrence characteristics and the mine water's characteristics in Shaanxi Province's main coal-mining area were summarized. The lithology, thickness and distribution, which were of the main aquifer, the main aquifuge, and the layer between the main exported coal seam's roof and the main aquifuge's floor, were studied in Yushenfu, Tongchuan and Jiaoping mining area. And according to the coal-mining's influence on groundwater's protecting target layer, which was the mean of main aquifer, the coal-mining area were divided into three types, which were preserved region, leakage region and none-water region. Also, it were studied that the situation of mine inflow, water quality characteristic and resource degree of the mine water. After the studies above, two main problems in the process of groundwater's protection and utilization were found out, that were large amount of groundwater's loss and low mine drainage's efficiency, and the main reasons were analyzed separately. The aquifer structure's destruction due to the coal mining was the main reason for the first problem. Little understanding about the groundwater's importance, poor basic environment protection equipment, unbalance development between the coal-mining industry, no support and guidance from the laws and regulations on the mine drainage's using, lack policy's support and motivation mechanism, low improve of the professional technique level, imperfect of technology and equipment, shortage of fund investment, and deficiency of scale and demonstration were for the second one. For the reasons above, some pertinent measurements for the groundwater's protection and utilization were put forward correspondingly. Developing preserving-water coal-mining, selecting rational mining-thickness, and improving the mining speed could be used to reduce the loss of groundwater. Strengthening the plan and guidance, improving polity and measures, broadening the types of financial investment, establishing and perfecting the standard system, and accelerating technology improvement might useful to improve the mine drainage's efficiency.