岩石块体理论中三维随机块体几何搜索

运用地质统计学与计算机技术随机模拟生成三维结构面网络,并在对前人关于结构面地质统计分析、结构面网络模拟、砍树、寻找封闭回路、搜索随机块体可能出现的最大区域等研究的基础上,运用交点组合法,通过交点旋转方向及空间位置的判断等过程,形成搜索三维随机块体的方法。运用该方法对边坡交棱处、洞室顶拱进行随机块体的搜索,并对块体的形态、大小及空间分布特征进行统计分析,从而实现了边坡和洞室工程的随机块体分析。算例表明,该方法可以在工程分析中得到较好的应用。

Geometric identification of stochastic block in block theory

The shapes, sizes and locations of blocks in rock mass cut by discontinuities are stochastic. The geostatistics and computer technology are applied to simulate the 3-D stochastic discontinuities. Then, the 3-D stochastic block can be searched by means of block theory and topology analysis, so that the distributions of shapes, sizes and locations of blocks can be analyzed statistically. In the procedure of searching the approaches of combination of intersections of discontinuity traces, judgment of rotation directions and the judgment of spatial positions of intersections are to be applied. The applications of the proposed method for searching the blocks in the joints of slope surfaces and the arch roof of cavern are presented.