Evaluation of Water Richness of Coal Seam Roof Aquifer Based on Analytic Hierarchy Process:Taking the Roof of No.1 Coal Seam in Liuzhuang Coal Mine of Huainan Coalfield as an Example
According to the supplementary exploration,mining engineering exposure and drilling data in the mining area,the occurrence and roof lithology characteristics of No.1 coal seam in Liuzhuang Coal Mine are expounded.Five factors affecting roof water abundance,such as sand-mud ratio,aquifer thickness,plane deformation coefficient,fault fractal dimension value and rock quality indicators,were selected.The traditional analytic hierarchy process(AHP)was used to evaluate the roof water abundance of No.1 coal seam in Liuzhuang Mine and the targeted water prevention and control measures were proposed according to the evaluation results.In general,there are differences in water abundance in the region.Among them,the water abundance of the Dongsan mining area is the most abun-dant.The relatively water-abundant areas are mainly distributed in the Xisan mining area;the medium water-abun-dant areas are distributed in the Xiyi mining area and the south of the Dongyi mining area,and the least water-abun-dant areas are distributed in the south of the east of the Xisi mining area.According to the evaluation results and the combination of mining and mining methods,it is recommended to improve the hydrogeological observation network system,calibrate the coal seam level,and use geophysical prospecting methods for advanced detection and grouting reinforcement.
1.Coal roofAnalytic hierarchy processWater abundanceSandstone fissure water
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