Abstract: The graphic method is adopted to explain and analyze volume expansion of broken complete rocks and the structure effects between the rocks.The research results show that,the little rocks of different sizes and shapes of broken complete rocks are acquired.Surface and line contact are the two kinds of contact modes.The bearing structure is stability, instability, stability periodic changes,and the its bearing capacity is more and more small.

Key words: Deformation of broken and inflation, Failure surface, Bearing structure, Slippage