JRC修正直边法的数学表达

JRC是反映爬坡角力学效应的岩体结构面表面形态等效描述指标。本文在爬坡角力学效应机理研究基础上, 阐述了JRC直边法的物理意义；通过岩体结构面表面起伏幅度与金属表面粗糙度幅度对比分析, 肯定了直边法的合理性；考虑JRC的尺寸效应, 推导JRC修正直边法的数学表达式, 编译计算机常用程序。最后, 实例检验了JRC修正直边法数学表达式的合理性和可用性。

MAETHEMATICAL EXPRESSION OF JRC MODIFIED STRAIGHT EDGE

Joint Roughness Coefficient (JRC ) is an equivalent index which describes mechanical effect of rock joint surface angle of ascent. In this paper, we firstly determined the physical meaning of JRC straight edge based on the mechanism study of mechanical effect of the angle of ascent and then we affirmed its rationality through the comparative analysis of the undulation amplitude of rock joint surface and the roughness amplitude of metallic surface. After that, we gave a mathematical formula and its computer program for JRC modified straight edge which contain scale effect of joint roughness coefficient.At the last I the rationality and availability of JRC modified straight edge were tested by practical example.