工程岩体分类RMS(Rock Mass Strength)

1 引言

目前发展的所有工程岩体分类(如下表所示)中，RMR系统是应用最广泛的一种方法。基于RMR，Laubscher(1976)发展出MRMR系统，这个系统在金属采矿工业中得到了广泛应用。本文简述另一种基于RMR发展出来的分类方法RMS(Rock Mass Strength).    

2 RMS (Rock Mass Strength)

Stille等人(1982) 对初始的RMR系统进行了改进，称之为RMS(Rock Mass Strength），这个改进的系统主要是为了获得岩体强度。这个系统主要强调了节理集对初始RMR值的影响，如下表所示。RMS系统是根据8个案例发展起来的，由于样本数量少，因此这种估计还需得到进一步的研究与证实。

首先求出原始的RMR,然后根据上表所示的值进行相加调节，得出RMS. 根据RMS可大致估算岩体的粘结力和内摩擦角。

3 参考文献

[1] D.H. Laubscher and J. Jakubec, The MRMR rock mass classification for jointed rock masses, Underground Mining Methods: Engineering Fundamentals and International Case Studies, W.A. Hustrulid and R.L. Bullock, Eds., Society of Mining Engineers, New York, 2001, 474–481.

[2] Laubscher, D.H. 1977. Geomechanics classification of jointed rock masses - mining applications. Trans. Instn Min. Metall. 86, A1-A8

[3] Laubscher, D. H. (1990) A geomechanics classification system for the rating of rock mass in mine design. J. S. Afr. Inst. Min. Metall., 90(10): 257–73. 

[4] Bieniawski, Z. T. (1989). Engineering rock mass classifications. p. 251. John Wiley & Sons, New York, Wiley.

[5] Hoek E, Kaiser PK, Bawden WF (1995). Support of underground excavations in hard rock. Balkema, Rotterdam, p. 215

[6] N.R. Barton, Some new Q-value correlations to assist in site characterization and tunnel design. International Journal of Rock Mechanics and Mining Science and Geomechanics Abstracts, Vol. 39, No. 2, 2002, 185–216.

[7] Terzaghi, K. 1946. Rock defects and loads on tunnel supports. In Rock tunneling with steel supports, (eds R. V. Proctor and T. L. White) 1, 17-99. Youngstown, OH: Commercial Shearing and Stamping Company.

[8] Wickham, G.E., Tiedemann, H.R. and Skinner, E.H. 1972. Support determination based on geologic predictions. In Proc. North American rapid excav. tunneling conf., Chicago, (eds K.S. Lane and L.A. Garfield), 43-64. New York: Soc. Min. Engrs, Am. Inst. Min. Metall. Petrolm Engrs.

[9] Pantelidis, L. (2009). "Rock slope stability assessment through rock mass classification systems." International Journal of Rock Mechanics and Mining Sciences 46: 315-325.

[10] Singh, B. and R. K. Goel (1999). Rock mass classification : a practical approach in civil engineering. Amsterdam ; New York, Elsevier.

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