深部巷道围岩稳定性影响因素显著性分析

Significance Analysis on the Factors Affecting Surrounding Rock Stability in Deep Roadway

为研究深部巷道围岩稳定性影响因素的显著性,基于张集煤矿1203工作面轨道顺槽生产地质条件,理论分析了巷道围岩变形的影响因素。通过数值模拟,探讨不同地质条件(开采深度、煤层厚度、坚硬顶板厚度)下巷道围岩塑性破坏的规律,将巷道围岩塑性总体积作为研究对象,通过灰色度分析求得3种影响因素对巷道塑性破坏的显著性顺序,得出3个因素对巷道围岩变形破坏影响程度从大到小依次为开采深度、坚硬顶板厚度、煤层厚度。

In order to study significance of the factors affecting the surrounding rock stability in deep roadway,based on the geological conditions of the orbital groove production in 1203 working face of Zhangji Coal Mine,the influencing factors of the surrounding rock deformation in the roadway were theoretically analyzed,and the numerical simulation was used to explore the law of plastic failure of the roadway under different geological conditions(mining depths,coal seam thicknesses and hard roof thicknesses).The total plastic volume of the roadway surrounding rock was taken as the research object.And through the grey analysis,the significance order of the three factors on the plastic failure of the roadway from large to small is mining depth,hard roof thickness and coal seam thickness.