Fine Recognition Of Geological Structure Surface On Different Scales Based By UAV And Photogrammetry

The developmental characteristics and characteristic parameters of rock mass in different scales are the key of rock mass identification.The strength of the whole rock mass is high,but the structural surface of the different scale exists,which leads to the discontinuity,nonuniformity and anisotropy of the mechanical properties and seepage characteristics of the rock mass.On the one hand,the geological structure in the rock mass is the channel to control the migration of groundwater;on the other hand,the quality of the surrounding rock is mainly controlled by the structural facies.Therefore,the study of structural feature parameters is very important.The identification of different scales of structural plane in rock mass is the key and prerequisite to obtain the parameters of structural plane.It is very important to explore the more accurate and fast joint recognition and extraction method for accurate acquisition of rock surface structure parameters.Geological facets with different scales have different engineering significance,so they need to scale on the structural plane.At present,the structural plane is divided into five grades,of which ?,?-level structural plane,can be collectively referred to as fault,the regional structure from the control effect,the difference lies in the length and width of the fault;?,?,?-level structure.Collectively referred to as joints,the scale is relatively small,so the main impact on the local stability and permeability of rock,from the scale of the distinction is also the joint extension length and opening degree of the difference.In this paper,the method of UAV and digital photogrammetry is adopted for different scale facets,and the traditional method is used to measure,accurately and quickly identify and extract the parameters of different scales.Multi-scale Structural Surface Parameter Recognition and Extraction.The details are as follows:(1)For the ?-level structural plane of more than 10 km fault zone,this paper takes the typical fault of 10 km above the typical pre-selected area of high-level radioactive waste disposal in Beishan,Gansu,and the low level fine photogrammetry,Fault zone,and the outcrop parameter extraction analysis,and determine the influence range of the ? fault zone on the integrity of the rock mass.The characteristics of the structural plane in the pit fault of the ? fault zone are studied by means of close-range photogrammetry.The parameters of the surface of the pits are analyzed and compared.The(2)For the second-order structural plane of the kilometer level,this paper mainly analyzes the typical ?-level fault in the pre-selection area of the high-level radioactive waste disposal in Beishan New Field,Gansu Province,and focuses on the typical outcrops of the ?-The influence of faults on the integrity of rock mass is studied.Then,based on the research method of Beiqi new field,the research method of UAV low-altitude fine photogrammetry and close-range photogrammetry is used to explore the advantages and disadvantages of UAV low-altitude fine photogrammetry and close-range photogrammetry.Grade ? structural plane is complementary to the measurement method(3)For the Grade ? structural plane below 10 meters,the main surface of the tunnel is the main object of study.According to the method of photogrammetry and image processing,the joint surface parameters of the joints were analyzed,and the integrity of the face was analyzed.Combined with the field mechanics test,the dynamic surface was monitored And the evaluation of the quality of the surrounding rock.(4)For the V-level structural plane of the meter and sub-meter level,ie,micro-joint,the groin joints of the typical I-level fault zone in the pre-selection area of the high-level radioactive waste disposal are taken as the research object,and the fine three-dimensional joint fissure measurement The fracture surface of fractured rock in the fault zone is analyzed,and the integrity of the fractured rock in the core of the fault zone is analyzed,and the data foundation is established for the fracture model of the fracture zoneIn this paper,a complete multi-scale facet surface recognition and measurement method is formed on the recognition and parameter extraction of different scales.The study of the construction of different scale facies model and the study of rock mechanics and seepage characteristics provide accurate and accurate Structural plane parameters.