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| Characteristics of groundwater dynamics in Jurassic aquifers and surges prediction |
| Shu Yiguo1, Li Yahao2, Wang Hongwei1, Kong Wanjun3 |
1. Huainan Western Mine Investment Management Corporation Ltd., Erdos Inner Mongolia 017000, China;
2. College of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China;
3. Erdos Huaxing Energy Corporation Ltd., Erdos 017000, China |
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Abstract Jurassic coal mining in western China is threatened by water damage in the roof sandstone, the dynamic changes of groundwater during the mining process was analyzed, and the surge of water is an important prerequisite for preventing water damage to the roof sandstone. Bojiang Haizi Mine was taken as an example, by comparing the working face before and after the mining of different aquifers groundwater, flow field analysis, found that the drainage before mining had no effect on the Cretaceous aquifer. and after recovery had some impact, reflecting the mining operation destroyed the water separator between the two aquifers. And based on the mine water-filling conditions and permeability analysis results, a modified large shaft method was adopted to predict the mine's F working surface water surges, the results was closer to the actual recovery, and provided some reference for mines with similar water hazards in the western Jurassic sandstone.
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