仰斜开采工作面覆岩运动规律研究

Study on overlying strata movement law of overhead mining working face

针对仰斜开采工作面顶板岩层控制问题,首先分析了倾斜工作面顶板岩层变形特点与近水平煤层的差异,指出倾斜煤层顶板有沿层位方向的拉断破坏和垂直层位方向的拉断破坏两种破坏形式。根据煤岩体材料特征,采用Maxwell弹粘性模型分析其本构方程和蠕变方程,进而建立了基于该本构关系的仰采面顶板岩层受力分析模型,得到了工作空间的平衡方程以及架后空间的顶板应力场、位移场组合方程,这两组方程能够较好地描述仰采面顶板岩层应力场和位移场的演化规律。应力场和位移场解析方程的建立为仰采工作面岩层变形控制及支架选型提供了的理论依据。

Based on roof strata control of overhead mining working face,deformation characteristics of roof strata and difference of close coal seam were analyzed,two damage forms of along and vertically the coal seam of inclined coal seam roof were given.Based on characteristics of coal and rock mass,its constitutive equation and creep equation were analyzed by Maxwell elastic-viscous model,the stress analysis model of the roof strata of the invert surface was set,equilibrium equation of working space and combination equation of roof stress field and displacement field of space after supporting,which showed evolution law of stress field and displacement field of roof strata of overhead mining.Analytic equation of stress field and displacement field provided theoretical reference for strata deformation control and support selection of overhead mining.