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Regional geologic rock body fracture simulation method based on fractal algorithm

A technology of rock mass fissures and simulation methods, which is applied in the field of fissure simulation in tunnel engineering areas and regional geological body rock mass fissures simulation based on fractal algorithm

Inactive Publication Date: 2017-03-22
PLA UNIV OF SCI & TECH
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Problems solved by technology

The current fractal research is limited to the two-dimensional plane, and the cracks are actually distributed in the three-dimensional space, so it is urgent to study a method to truly simulate the cracks in the three-dimensional rock mass

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  • Regional geologic rock body fracture simulation method based on fractal algorithm
  • Regional geologic rock body fracture simulation method based on fractal algorithm
  • Regional geologic rock body fracture simulation method based on fractal algorithm

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Embodiment 1

[0066] This embodiment provides a method for simulating cracks in regional geological bodies and rock masses based on fractal algorithms. The process of the method is as follows figure 1 As shown, firstly, according to the attribute information of the surrounding rock of the tunnel, the geological bodies along the tunnel are divided into different regions; then, different regions are studied separately, and the fractal depth of this region is calculated according to the attribute information of the surrounding rock in different regions; then, according to the field statistics The information determines the LS grammar structure of the 3D fractures; finally, the 3D simulated fractures generated by re-sampling can generate realistically simulated 3D rock mass fractures located inside the regional geological body.

[0067] Taking the Yuelongmen tunnel route as an example, it includes the following steps:

[0068] Step 1. Divide different areas according to the properties of the su...

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Abstract

The invention discloses a regional geologic rock body fracture simulation method based on a fractal algorithm. The regional geologic rock body fracture simulation method comprises the following steps: firstly, partitioning a geologic body in a region alongside a tunnel into different regions according to property information of tunnel surrounding rocks; secondly, researching different regions respectively, and calculating fractal depths of the regions according to the surrounding rock property information of different regions; thirdly, determining an LS grammatical structure of a three-dimensional fracture according to on-site statistical information; and lastly, resampling a generated three-dimensional simulation fracture to generate a three-dimensional rock body fracture. Through adoption of the rock body fracture simulation method, the aim of manually controlling a fractal fracture tree form of the three-dimensional fracture is fulfilled by researching how to control the fracture tree form with a growth angle parameter alpha and probability control parameters U and V, how to draw the fractal fractures in different shapes of the three-dimensional fracture and how to adjust proportions of various fractal elements during generation of the fractal fractures; a parametric design of drawing the fractal fractures of the three-dimensional fracture with an LS grammar is realized through a program; and the three-dimensional fracture in an engineering region of the tunnel is simulated.

Description

technical field [0001] The invention relates to a method for simulating cracks in rock mass, in particular to a method for simulating cracks in tunnel engineering areas, in particular to a method for simulating cracks in regional geological bodies and rock mass based on fractal algorithms. Background technique [0002] Cracks in rock mass are common geological structures in geological bodies, and their shapes are complex and strange. Modeling them is difficult when simulating their generation with a computer. In order to generate a realistic fracture model, generally speaking, the simple recursive method cannot fundamentally solve this problem. The introduction of fractal method provides a new way for fracture model configuration. Random LS grammar introduces random variables to make rules with different appearances appear randomly according to different probability distributions, thus producing more natural and vivid graphics. However, in the traditional LS grammar, only...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/05
CPCG06F30/23G06T17/05
Inventor 熊自明郭甲腾王明洋卢浩戎晓力马超董鑫
Owner PLA UNIV OF SCI & TECH
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