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Abstract With the continuous increase of mining depth, the water pressure of the floor aquifer in the coal seam is increasing, which seriously threatens the safety of mine production and the safety of workers. The No.3, 2+3, 4, 7, 8, 9 and 10 coal seams of Xiqu Coal Mine in Shanxi are all mining under pressure, and the coal seam floor is Ordovician limestone aquifer. In order to ensure the safe mining of the mine, the water filling source and water filling channel of the mine were studied, and the water outburst risk of the coal seam was reasonably evaluated by the water outburst coefficient method and the safe water head value calculation method. The research showed that all coal seams in range of the mining under pressure belonged to the mining safety zone, which could be safely excavated after formulating prevention and control measures.
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