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基于Hoek-Brown经验强度准则,采用最小二乘法拟合出岩体力学强度参数,并与H-B_02ed推荐的等面积拟合结果进行对比,结果发现两种拟合方法得出的岩体内摩擦角数值相差很小,但等面积拟合法得出的黏聚力强度远高于最小二乘拟合法。将两种强度参数拟合结果应用于深部矿体开采的数值模拟,发现采用最小二乘拟合法的岩体强度参数其模拟结果更接近工程实际。该方法对深部岩体力学参数的确定具有一定的借鉴意义。
Based on the Hoek-Brown empirical strength criterion, the mechanical parameters of rock mass are fitted by least square method and compared with the results of H-B_02ed recommended equal-area fitting. The results show that the internal friction of rock mass obtained by the two fitting methods However, the cohesive strength obtained by the isosurface fitting method is much higher than that of the least square fitting method. Applying the fitting results of two strength parameters to the numerical simulation of deep orebody mining, it is found that the simulation result of rock mass strength using the least squares fitting method is closer to the engineering practice. The method can be used to determine the mechanical parameters of deep rock mass.