Underground engineering surrounding rock modeling method based on combined mesh generation
A technology of underground engineering and grid model, which is applied in the field of underground engineering to achieve the effect of ensuring grid
Active Publication Date: 2022-05-13
CHINA COAL RES INST
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[0004] Unfortunately, the current mainstream modeling methods often cannot combine the advantages of the two, but only use one of the structured grid or the unstructured grid for grid division
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[0029] The technical solutions of the present invention will be described in more detail below in combination with the accompanying drawings in the embodiments of the present invention.
[0030] A method for modeling surrounding rock in underground engineering based on combined grid division, comprising the following steps:
[0031] S1, build a 3D model of the excavated rock mass with a structured grid, including S11-S14,
[0032] S11, according to the size of the excavated rock mass model, establish the closed surface of the underground engineering excavated rock mass model; for example figure 1 As shown in , the closed surface of the excavated rock mass model is a roadway or tunnel including the upper circular arch cylinder and the lower cuboid, and the two ends are the entrance and the exit respectively;
[0033] S12, using the structured grid to subdivide the closed surface of the excavated rock mass model to generate a grid model of the excavated rock mass, the grid mode...
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The invention provides an underground engineering surrounding rock modeling method based on combined grid subdivision, which comprises the following steps of: firstly, establishing a region which needs to be finely analyzed, subdividing by adopting a structured grid, and extracting a grid edge curve and an internal surface grid of the region; secondly, establishing an external surrounding rock curved surface which is subjected to key analysis, cutting the external surrounding rock curved surface by using the extracted grid edge curve, carrying out preliminary subdivision on the part of the surrounding rock curved surface, and then subdividing the grid edge curve, an inner surface grid and a preliminarily subdivided grid again by using an unstructured grid to obtain a peripheral unstructured grid which shares a node with the structured grid; and finally, importing the structured grid and the unstructured grid into numerical simulation software, and combining nodes located at the same position to complete combined grid subdivision. The structured grid contributes to an excavation part and an interface between the excavation part and an external surrounding rock, the unstructured grid contributes to the external surrounding rock, and the structured grid and the unstructured grid which share the node are spliced, so that the density of the grids is ensured to be consistent.
Description
technical field [0001] The invention relates to the field of underground engineering, in particular to an underground engineering surrounding rock modeling method based on combined grid division. Background technique [0002] Underground coal mining activities have the engineering characteristics of a wide range of mining. If the entire mining space is studied, the amount of analysis will be large. Therefore, when analyzing specific engineering problems, fine analysis is often carried out on the key research areas. Taking the support research of coal mine roadway as an example, the general research scope is limited to the shallow surrounding rock of about ten meters on both sides of the roadway. This requires that when building a model to analyze mining activities, it must be focused, and the location that needs fine analysis should be finely described, while for the non-key research area, the model can be roughly processed. [0003] There are mainly two types of modeling g...
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IPC IPC(8): G06F30/13G06F30/20G06T17/20G06F111/10
CPCG06F30/13G06F30/20G06T17/20G06F2111/10
Inventor 杜伟升李海涛郑伟钰张海宽杨冠宇王嘉敏李春元杨森森
Owner CHINA COAL RES INST