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Numerical simulation method for establishing jointed rock mass discrete element model based on point cloud data

A technology for point cloud data and jointed rock mass, which is applied in image data processing, CAD numerical modeling, special data processing applications, etc., and can solve problems such as unsuitable mechanical methods.

Pending Publication Date: 2021-05-11
NORTHEASTERN UNIV
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Problems solved by technology

However, in some cases, the rock mass cannot be regarded as a continuous medium, such as the roadway in the underground jointed rock mass, at this time, it is not suitable to use the mechanical method to deal with the continuous medium for calculation

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  • Numerical simulation method for establishing jointed rock mass discrete element model based on point cloud data
  • Numerical simulation method for establishing jointed rock mass discrete element model based on point cloud data
  • Numerical simulation method for establishing jointed rock mass discrete element model based on point cloud data

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Embodiment Construction

[0032] The invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.

[0033] Such as figure 1 As shown, a numerical simulation method for establishing a discrete element model of jointed rock mass based on point cloud data, including:

[0034] Step 1: Scan the surface of the jointed rock mass with a 3D laser scanner to obtain a point cloud dataset of the jointed rock mass;

[0035] A large amount of initial point cloud data is obtained by scanning the surface of the jointed rock mass with a 3D laser scanner, but the collected initial point cloud data is too large, which causes great inconvenience to subsequent storage, display, search, and management. First, the point cloud needs to be streamlined to remove redundant and invalid data that is not used in post-processing. Use the field interception method to perform simple filtering on a specified dimension, remove points inside / outside the specified range, a...

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Abstract

The invention provides a numerical simulation method for establishing a jointed rock mass discrete element model based on point cloud data. Firstly, a point cloud data set of a jointed rock mass is obtained, denoising and simplified filtering processing are carried out, then the occurrence of the structural plane is calculated, a three-dimensional model for recognizing the structural plane is established through the point cloud data, and discrete element software 3DEC cannot be directly imported; by means of Fracman software which has powerful structural plane modeling function and Rhino software which has complete software model processing function, the model is processed into a data file readable by 3DEC software, then the data file is imported into the 3DEC software for numerical analysis, a final three-dimensional model of the jointed rock mass is generated, the jointed rock mass model generated through the method can obtain more accurate and real rock mass conditions, and a more reliable basis is provided for an engineering site.

Description

technical field [0001] The invention relates to the technical field of numerical simulation of geotechnical engineering, in particular to a numerical simulation method for establishing a discrete element model of a jointed rock mass based on point cloud data. Background technique [0002] Rock mass is a kind of discontinuous geological material. It has undergone long-term geological tectonic action and formed a certain structure in a certain geological environment, showing a wide and variable material response range. Compared with general engineering materials, the biggest feature of rock mass is that it generally has structural discontinuity, which is mostly cut by weak surfaces such as bedding layers and joint surfaces. The properties of the rock mass depend on the mechanical properties of the complete rocks that make up the rock mass, as well as the number and properties of the discontinuous surfaces that the rock mass has suffered from multiple stress changes in the long...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/05G06F111/10
CPCG06F30/20G06T17/05G06F2111/10
Inventor 赵兴东邓磊
Owner NORTHEASTERN UNIV
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