1. Engineering rock mass classifications;Bieniawski,1989
2. An introduction of the engineering rock mechanics;Hudson,2005
3. Fuzzy set approaches to classification of rock masses;Aydin;Eng Geol,2004
4. Nguyen VU, Ashworth E. Rock mass classification by fuzzy sets. In: Proceedings of the 26th US symposium on rock mechanics. Rapid City; 1985.
5. Numerical analysis of the cooling effect of an embankment with ventilated ducts and closed block stones;Zhang;J China Univ Min Technol,2011