3Tan Cheng xuan,Wang Rui jiang,Sun Ye,et al. Numerical modeling estimation of the 'tectonic stress plane' (TSP) beneath topography with quasishaped valleys [J] . International Journal of Rock Mechanics and Mining Sciences, 2003 ,40 (6) :34-39.
4Martin,C. D. Characterizing in-situ stress domains at the AECL underground research laboratory []] . Canadian Geotechnical Journal, 1990,27 :631 646.