节理岩体爆破的块度计算模型

Model of Fragment size Calculation for Blasting in Joined Rock Mass

以分形理论和现场实测数据为基础，提出了节理间距的Ｃａｎｔｏｒ集分布和岩体天然块度的计算方法，用随机分形构造模型描述爆破岩块的形成过程。按照损伤力学的方法，研究节理岩体爆破机制，提出岩体破碎比率这一新概念，由此建立了节理岩体爆破块度计算的损伤模型。

Based on fractal theory and practical data,the Cantor set distribution of joint spacings and the method of calculating natural fragment sizes are put forward,and the process of blasted fragmentation formation is described by a stochastic fractal structure model.In accordance with the method of continuum damage mechanics,the blasting mechanism of jointed rock mass is studied,and a new concept “rock mass fracture ratio' is put forward,thus a damage model of fragment size calculation for blasting in jointed rock mass is set up.