利用数值模拟方法确定导水裂隙带发育高度

采用三维数值计算的方法,根据塑性条件、破坏准则、位移及应力判别,同时结合覆岩移动、应力分布和塑性区域分布规律,分析比较了在工作面回采过程中沿工作面走向和倾向的冒落带和裂隙带发育高度。得出沿走向模型的冒落带高度约17.7 m,导水裂隙带高度约33.7 m;沿倾向模型的冒落带高度约20.2 m,导水裂隙带高度约33.8 m。实践证明,通过数值模拟的方法预测冒落带和裂隙带发育高度具有较大的优越性。

Determining Height of Water-flowing Fractured Zone with Numerical Simulation Method

Analysis and comparison were made in this paper on the developmentheight of the caving zone and fractured zone along the strike and dip of the face during coal mining with the three -dimensional numerical simulation method, according to the plastic condition, destruction rule, displacement and stress discrimination and in the light of the displacement, stress distribution and plastic regional distribution rule of overburden rock. The results are that the height of the caving zone along the strike model is about 17.7m and the height of the fractured zone is about 33.7m; the height of the caving zone along the dip model is about 20.2m and the height of water-flowing fractured zone is about 33.8m. The practice proved that the use of numerical simulation method to predict the development height of the caving and fractured zones has bigger superiority to other methods.