Salt cavity surrounding rock geological three-dimensional modeling method under multiple feature constraints

Abstract

The invention discloses a salt cavity surrounding rock geological three-dimensional modeling method under multiple feature constraints. According to the method, in a three-dimensional modeling process of a saline stratum by use of multi-source data, engineering geographical boring, triangular net digital high-elevation model, a mining area boundary, a mudstone interlayer and the like are taken as important feature constraint conditions, the three-dimensional modeling process of the saline stratum of a real geographical environment is constructed by full use of landform, geomorphy and geographical features revealed by the multi-source data; and by use of sonar detection data, a salt cavity surface three-dimensional model is constructed and is taken as an internal hole constraint, and by use of such space analysis operation as a three-dimensional space Boolean operation, grid dispersing and the like, salt cavity surrounding rock geological three-dimensional modeling is realized under the multiple feature constraints. The method provided by the invention can construct a salt cavity surrounding rock geological three-dimensional model reflecting a true three-dimensional geometric form, provides an effective calculation model for salt cavity surrounding rock creep deformation characteristic value simulation and analysis, and improves the safety of energy reservation by use of a salt cavity.

Description

technical field [0001] The invention belongs to a three-dimensional modeling method, in particular to a three-dimensional modeling method for salt cavity surrounding rock geology under multi-feature constraints. It involves GIS, computer graphics, computational geometry, GMS, rock mechanics numerical simulation and other disciplines, specifically involving multi-source data integration, 3D GIS spatial modeling and analysis, geological 3D modeling and simulation, etc. Background technique [0002] Salt rock has very low permeability characteristics and good creep behavior, which can ensure the sealing of salt caverns. Its mechanical properties are relatively stable, it has damage self-recovery ability, and can adapt to changes in internal pressure. Therefore, the underground formed after salt rock mining The dissolution cavity has become the main medium for energy storage in countries all over the world. Different from the thick salt domes formed by marine deposits in foreig...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a three-dimensional modeling method for salt cavity surrounding rock geology under multi-feature constraints. It utilizes three-dimensional GIS spatial modeling and analysis technology to carry out unified organization and expression of multi-feature constraints, and overcomes the existing salt cavern geology. Shortcomings of inefficiency in simulation and analysis of cavity surrounding rock creep in 3D geological modeling

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