Abstract：According to both determinate geological and statistical date，different categories of geological objects are built through coupling stochastic network simulation technology and 3D geological modeling，which based on a NURBS-BRep hybrid data structure，and then 3D refined model of rock structures are completed. Based on the 3D refined model，the concept and mathematical definition of surface-block are presented，comprehensive consideration of stochastic fissure and definite geological structural planes such as spatial faults and excavation face of underground structures，three theorems—sealability，completeness and uniqueness，are put forward to realize identification and analysis of surface-block. In combination of actual project，surface-blocks around underground cave are quickly identified by using surface-block identification theorems and related technologies，supplying much effective geological and geometric information for the following stability analysis and surrounding rock support.
LIN D，FAIRHURST C，STARFIELD A M. Geometrical identification of three-dimensional rock block systems using topological techniques[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1987，24(6)：331-338.
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2011, Vol. 30 
