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中文摘要：
在获取力学参数的基础上，基于FlAC^3D建立了底板突水渗流一损伤耦合数值模型。确定了12煤层底板破坏深度范围，分析了水压、开拓进度（100m步距）对破坏深度的影响。研究成果认为，范各庄12煤的底板影响深度随着开采的步距的加大发生有规律的变化，在开采20a时，底板影响深度达到23m左右，这与范各庄矿的12煤底板的影响深度为18m的实际非常接近，为该矿的后续开采提供科学依据。
英文摘要：
Base on the mechanics parameters obtained, the FLAC^3D was applied to establish a floor water inrush influent - damage coupling numerical model. The floor failure depth scope of the No. 12 seam was determined. The paper analyzed the water pressure and development progress （100m step distance） affected to the failure depth. The study achievements showed that the floor failure influence depth of the No. 12 seam in Fangezhuang Mine would be varied regularly with the mining step distance increased. During the mining in 20a, the floor influence depth was reached to about 23 m and was actual very close to the 18m of the influence depth in the No. 12 seam floor in Fangezhuang Mine. This influence depth could provide the scientific base for the sequence mining in the mine.
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