METHOD AND APPLICATION OF DIMENSION PREDICTION OF SUBLEVEL COAL FRAGMENTS
顶煤块度预测方法与应用

Based on the simulating technique of joint network of rock and coal mass,the calculation process and its formula of three-dimensional size of sublevel lump coal are put forward in the working face of sublevel coal caving mining. The evaluating method of drawability of sublevel coal,based on the dimension of sublevel coal fragment,and its corresponding index of classification are advanced. This method has advantage of objectivity,high reliability and is acceptable. And then the relation between fragment dimension of sublevel coal and fractal value is discussed.