Modeling method for three-dimensional rock block system
A system modeling and rock technology, which is applied in the stability analysis of rock block system in slope and underground engineering, and in the field of three-dimensional rock block system modeling, achieves the effect of simple operation, high analysis accuracy and complete theory
Active Publication Date: 2017-11-24
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology
Although these existing methods realize the three-dimensional block system modeling of complex rock mass, they all adopt the method of small / sub-block combination for complex blocks
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Embodiment 1
[0035] A three-dimensional rock block system modeling method, the steps of which are:
[0036] 1. Input the triangle representing the boundary of the rock mass engineering model, determine the geometric parameters of the random structural surface, and establish the topological access relationship of each surface in the space.
[0037] Take the triangle ABC as an example. It is composed of sides AB, BC, and CA. Side AB has points A and B as endpoints, side BC has points B and C as endpoints, and side CA has points C and point A are used as endpoints, and points A, B, and C are defined by the three-dimensional coordinates (x i ,y i ,z i ) represents, wherein i=A, B, C. For triangle ABC.
[0038] 2. Calculate the intersection lines of all surfaces in the space.
[0039] Take any two triangles in the space, set triangle ABC (surface number 1) and triangle DEF (surface number 2), if there is an intersecting line segment GH between them; store the intersecting line segment GH, ...
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The invention discloses a modeling method for a three-dimensional rock block system. The modeling method includes the following steps: A, inputting triangles that represent boundaries of a rock engineering model and determine geometric parameters of random structured surfaces, and establishing topological access relationships among sides, edges and points of the triangles; B, calculating intersecting lines of all the sides in the space; C, conducting line segment coplanar identification through a recursion algorithm; D, calculating intersecting lines of all the line segments in the space; E, identifying closed loops on all the sides in the space; F, analyzing inclusion relationships among the closed loops; G, updating the topological access relationships among the sides, the edges and the points; H, cancelling isolate polygon sides in the space, and generating twin sides of non-isolate polygon sides; and J, identifying all three-dimensional rock blocks in the space through geometric topology analysis; and analyzing inclusion relationships among the blocks. All-space identification of a three-dimensional complex block system is realized through geometric topology correlation analysis of points, lines, sides and bodies in a rock structured surface network. The method is easy to operate, and the analysis precision is high.
Description
technical field [0001] The invention belongs to the technical fields of geotechnical engineering such as water conservancy, transportation, and mining, and more specifically relates to a three-dimensional rock block system modeling method, which is especially suitable for stability analysis of rock block systems in slopes and underground engineering. Background technique [0002] After the engineering rock mass has undergone complex geological actions, there are geological structural planes (faults, joints, fissures) of different scales and properties inside. These deterministic or random structural planes combine with each other to cut the rock mass into different shapes. , Rock blocks of different sizes and compositions. Under the influence of environment and engineering, these blocks are often prone to collapse, slide and other instability phenomena, which seriously endanger social development and people's safety. The prevention and control work has become a major demand ...
Claims
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IPC IPC(8): G06T17/10
CPCG06T17/10
Inventor 付晓东盛谦张善凯
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI