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为研究深部承压水上开采煤层底板破坏特征,以梁宝寺煤矿2~#井3501工作面采场条件为工程背景,基于FLAC3D数值仿真软件,建立承压水上煤层深部开采的流-固耦合数值模型,对工作面回采过程中煤层底板破坏特征进行分析研究.研究结果表明:煤层开采后底板承压水导升高度明显增高,最终达到峰值19 m,煤层底板破坏深度先增大后趋于平缓,且当工作面推进至120 m时达到最大值为18 m,通过理论计算与现场实测的进一步验证,模拟结果与理论计算和现场实测值较为接近,由此可见FLAC3D数值仿真软件可以用于深部承压水上开采煤层底板破坏特征的研究.
In order to study the failure characteristics of coal seam floor under deep confined water mining, taking the mining conditions of 3501 working face in No.2 ~ No. Well of Liangbaosi Coal Mine as the engineering background, based on FLAC3D numerical simulation software, the fluid-solid coupling numerical Model is used to analyze the failure characteristics of coal seam floor during the process of face mining.The results show that the height of confined water in bottom floor increases obviously after coal mining and finally reaches the peak value of 19 m and the failure depth of coal seam floor first increases and then tends to be gentle , And reached a maximum value of 18 m when the working face was advanced to 120 m. Through theoretical calculation and field verification, the simulation results are close to the theoretical calculation and field measurements. Therefore, FLAC3D numerical simulation software can be used in deep Study on Destruction Characteristics of Coal Floor Slab under Confined Water Mining.