导水裂隙带高度的数值模拟分析及实测

Numerical Simulation and Field Measurement of Water Flowing Fractured Zone

通过单轴压缩实验获取岩石力学参数,采用经验公式对浅埋薄煤层工作面导水裂隙带进行理论预计,使用FLAC3D软件进行数值模拟,并使用双端堵水器进行现场实测对模拟结果进行验证。研究表明,采空区上覆岩由于受到剪切力和张拉力发生塑性破坏而产生贯通裂隙,而弯曲带岩土层仍处于弹性状态,通过塑性区的破坏范围能够较为准确的判断导水裂隙发育最大高度,相比现场实测能大量减少对人力、物力的投入,为矿井安全生产提供有效指导。

With rock mechanics parameters obtained through uniaxial compression experiments,using the empirical formula and software of FLAC3 Dto predict the Height of Water Flowing Fractured Zone,and simulation results was coincident with field measurement.The results show that,the connected fissures was formed by the plastic failure which produced by the stress of shear and tension,but the rock and soil layers of bend zone was still in the elastic state. Through the destruction of plastic zone can be more accurate to determine the maximum height of the Water Flowing Fractured Zone,can reduce the human and material resources,and provide effective guidance for mine safety production compared to the field measured.