经验参数m,s对岩体强度的影响

Influence of empirical parameters m and s on rock mass strength

在研究Hoek-Brown经验强度准则过程中,不难发现,该准则将工程岩体在荷载作用下表现出来的复杂破坏,归结为拉伸和剪切破坏两种机制;将影响岩体强度的复杂因素,集中包含在准则引用的两个经验参数m(岩石软硬程度)、s(岩体破坏程度)之中。因而研究m,s两参数对岩体强度的影响,有较大的工程实用价值。本着从工程应用精度要求出发,侧重其m,s对岩体强度值计算精度的影响和规律进行了探讨和研究,指出了精确确定m,s值对岩体强度的应用与理论规律研究的重要性,同时也对工程正确应用该准则给予了启迪和帮助。

In studying the contents of Hoek-Brown strength criterion, it is easy to discover that the complicated failure of engineering rock under loads is generalized to tensile and shear failures, and that factors affecting the rock strength are interpreted with two empirical parameters in the criterion, m （ the degree of stiffness of rock） and s （ the degree of failure of rock）. So there is much practical value in engineering to study the two parameters rn and s that influence the strength of rock. To satisfy the digital accuracy of engineering, the article mainly describes the regulation of the parameters, influencing the accuracy of strength value of rock masses; meanwhile it points out that there is important meaning and value to raise the accuracy of the two empirical parameters. Also this paper is beneficial to applying the standard to engineerings.