多因素耦合下倾斜采场覆岩结构特征及应力分布研究

Structural characteristics and stress distribution of overlying strata in inclined stope under multi-factor coupling conditions

为了对多因素耦合条件下倾斜采场的覆岩结构特征进行分析,以山东阳城煤矿3308工作面为研究背景,采用现场调研、数值模拟的综合研究方法,从工作面开采覆岩破断规律、覆岩应力场分布特征及塑性区演化规律3个方面研究了倾斜采场覆岩结构特征。沿工作面倾向开采引起的覆岩垮落使得采场整体形态呈现椭圆分布,沿工作面走向开采引起的覆岩垮落使得采场整体形态呈现梯形分布,塑性区整体呈现出“椭圆”状,且由于工作面沿断层布置和矸石堆积等问题,导致采场顶板呈现出较为复杂的应力环境。结合前文分析和现场实际情况提出了顶板控制建议。

In order to analyze the overlying strata structure characteristics of inclined stope under multi-factor coupling conditions,No.3308 Face of Yangcheng Mine was taken as the research background,the overlying strata structure characteristics of inclined stope were studied from three aspects:the fracture law of overlying strata,the distribution characteristics of overlying strata stress field and the evolution law of plastic zone by using the comprehensive research methods of field investigation and numerical simulation.The caving of overlying strata caused by inclined mining along the working face made the overall shape of the stope appear elliptical distribution,while the caving of overlying strata caused by mining along the working face made the overall shape of the stope appeared trapezoidal distribution,and the plastic zone appeared elliptical shape as a whole.Moreover,due to the layout of the working face along the fault and the accumulation of gangue,the roof of the stope presented a more complicated stress environment.Combined with the previous analysis and the actual situation on site,the roof control suggestions were proposed.