Abstract: Focusing on the heterogeneous property of jointed rock-mass and combining with generalization model，equivalent deformation theory as well as equivalence methods，the relationship between deformation parameters of jointed rockmass and stress gradient is put forward． Study shows that the weak part of rock-mass may lessen the comprehensive deformation parameter under high stress gradient，and that the greater heterogeneous component difference in the jointed rockmass， the greater variation range appears for its equivalent deformation parameter． The equivalence of equivalent elastic modulus has accounts to 136% maximally，while the minimum is less than 110% for the near homogenously rock-mass．

Key words: stress gradient, heterogeneous materials, deformation parameters, generalization model, equivalent deformation; equivalence

摘要： 针对节理岩体非均质性特征，利用概化模型、变形等效及当量化处理等方法，研究了梯度应力作用下节理岩 体的变形参数变化规律。研究表明: 构成岩体的成分不均匀性越显著时，等效弹性模量变化越大，计算得到的最大 等效弹性模量当量变化达136%; 而当岩体均匀性较好时，等效弹模当量变化小于110%。

关键词: 应力梯度, 非均质材料, 变形参数, 概化模型, 等效变形, 当量化