近水平煤层综放面导水裂缝带最大高度分析及其研究

Analysis and Study on Max Height of Water Flowing Fracture Zone in Fully Mechanized Top Coal Caving Mining Face in Horizontal Seam

在近水平煤层条件下,利用离散元模拟的方法,分析了综放采场上覆岩层的运动特征,根据覆岩位移及应力变化规律,确定了覆岩的导水裂缝带高度。通过现场实测验证表明,数值模拟所得的裂缝带高度与实测结果相吻合,说明利用数值模拟的方法确定综放面覆岩导水裂缝带高度是可行的。

Under the horizontal seam condition,the discrete element simulation method was applied to analyze the movement features of the overburden strata above the fully mechanized top coal caving mining face.According to the displacement and stress migration law of the overburden strata,the height of the water flowing fracture zone in the overburden strata was determined.The verification of the mine site measurements showed that the fracture zone height measured with the numerical simulation was well fitted with the actual measured results and the application of the numerical simulation method could be feasible to determine the height of the water flowing fracture zone in the overburden strata above the fully mechanized top coal caving mining face.