以朱仙庄矿Ⅱ5采区为研究对象,采用相似模拟和数值模拟研究方法,研究了下保护层10#煤开采时上覆岩层变形破坏规律。研究结果表明,覆岩呈梯形破坏演化特征,向前和向上渐进式发展,离层发育高度随工作面推进距离增大呈间断跳跃式增加特征;采空区上方15~60 m横向裂隙较发育,竖向裂隙明显减少,上覆岩层垮落角约为60°。 Taking the mining area Ⅱ5 of Zhu Xianzhuang Mine as the research object, the deformation and failure law of the overburden strata during the mining of 10 # coal in the lower protective layer were studied by using similar simulation and numerical simulation methods. The results show that the overlying strata show trapezoidal failure evolution characteristics, which are progressive and upward progressive. The height of the detachment layer increases intermittently and leaps upwardly with the advancing distance of the working face. The lateral fissures of 15-60 m above the goaf are more developed , The vertical fissure is obviously reduced, and the overlying rock fall angle is about 60 °.