Interpretation And Spatio-temporal Modeling Of Fault Development Process Based On Geological Map

The automatic resolution and time-space modeling of the development process of geological faults have been of great significance in many fields such as urban planning,geological simulation,and engineering construction.However,current faults dating researches based on high-cost thermochronological methods,inefficient manual analysis methods for the development of fault structures,and 3D geological modeling methods limited by borehole data make it difficult to put universal applications of the time-space modeling in the process of fault structures.Therefore,based on the principle of geological penetration,this paper explores a structural analysis method for successively subtracting faults of different development periods in geological maps/profiles,on the basis of automated analysis of the sequence and development time of faults,and forms a method based on Multi-stage fault structure geological map,a method of constructing a 3D model of multi-stage fault structures.The fault development process,studied in this paper,is automatically analyzed by the time-space modeling method.Using the geological knowledge and cross-cutting relationships,the dependence on modeling data is reduced,by which new ideas can be provided for the analysis of the fault structure development process and the time-space modeling.Briefly,the main research conclusions and results of the thesis are as follows:(1)Automatic analysis of fault development time based on cross-cutting relationships.This paper infers the sequence of fault development based on the cutting relationship between faults,and infer the development time of faults based on the piercing relationship between faults and strata,integrate the sequence and development time of faults,and automatically analyze the development period of faults.Experiments show that this method can quickly analyze the fault time attributes of complex fault areas to a certain extent,and can provide a certain data basis for the simulation of the fault structure development process when the absolute development time is lacking.(2)Multi-stage geological map/profile restoration based on the gradual reduction of faults.Based on the sequence of fault development,according to the corresponding relationship between the upper and lower walls of the fault,the faults of different stages are gradually subtracted from new to old,forming a multi-stage geological map/section map of the fault structure development area.Experiments show that,for the development area of fault structures,this method can analyze the development process of fault structures through the reduction of a series of fault structures and the restoration of the upper and lower walls,and reconstruct the morphology and spatial distribution of the strata in different development periods.(3)3D modeling of fault structures using geological maps.Based on the decomposition of stratigraphic boundaries,the boundary of the strata can be divided into multiple segments with consistent occurrences;through the deduction of stratigraphic occurrences,the spatial shape and spatial distribution of the corresponding boundary segments of the buried part can be determined,and the three-dimensional fault structure can be further realized Modeling.Experiments show that this method can construct a more accurate three-dimensional model of fault structure based on topographic and geological maps under the constraints of occurrence characteristics.(4)Time-space modeling of fault structures based on multi-phase geological maps.Analyze the sequence of fault development based on the cutting relationship between faults,and gradually reduce the faults from new to old,and generate multi-phase geological maps of fault structures.By constructing three-dimensional models of fault structures in different periods in sequence,fault structure can be realized to a certain extent.4D dynamic simulation of development process.