煤田陷落柱氡气场的数值计算及空间形态分布特征

THE SPACE CHARACTERISTICS AND THE RESULTS OF NUMERICAL COMPUTING OF THE RADON FIELD AROUND A COLLAPSE COLUMN

根据流体场的扩散理论和对流理论 ,建立了扩散系数与对流速度为常量或变量情况下的氡气场三维状态方程 ;对于陷落柱柱体侧面有源氡气场和柱体体内有源氡气场两种理论模型 ,给出了不同系数和边界条件下的数值解的形式 .针对模型的特点及其边界条件用差分法分别进行了数值计算 ,结果表明陷落柱氡气场的空间形态分布特征 .野外实测和模型试验的结果相互吻合 .

According to the theory of flow diffusion and convection, three dimensional state equation of radon field is established for constant and variable diffusion coefficient and convection rate. The numerical solutions for different coefficient and different boundary conditions are obtained for two models of radon field which have respectively source in the side and inside of collapse column. The numerical computations have been made using difference method for difference characteristics and boundary conditions. The computation results show the state features of radon field in space. The results of the field survey and model test are coincide.