| 摘 要： | At present, the mechanics theories studying softrock engineering gcnerally depend on linear small-deformation hypothesis of classical mechanics, Although these theories can be considered with the physical non-linear features of softrock, it is still an approximate theory of geometric small-deformation. Because of the specific characteristics of medium environment, the problem of softrock engineering should be thought as large deformation. This article will prove the advantages of large deformation theory in solving softroek problem with an example of the No. 2 pit of NaLong Coal Mine. This will provide a bencflcal method for the studying of large deformation mechanics of softroek engineering.
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