中文摘要：

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Barton直边法的研究基础上，利用直边图的几何性质，推导出结构面粗糙度系数Barton直边法的简明公式，并通过实例检验了JRC简明公式的合理性和实用性。

英文摘要：

Joint Roughness Coefficient （ JRC） is an equivalent index which describes mechanical effect of rock joint surface angle of ascent. This paper investigates the geometrical characters of Barton＇s straight edge method and derives a concise formula for JRC from the Barton＇s straight edge method, t The paper further tests the rationality and availability of JRC modified straight edge with practical example.