Digital Measurement of Jointed Rock Mass in Mines and Failure Characteristics of Tunnel Model
With the vigorous development of spatial information acquisition technology,three-dimensional geological mineral measurement and visualization have become an important part of digital mining construction,which is of great significance for improving engineering design level and ensuring safe operation of engineering.With the help of the beyond line of sight non-contact 3D laser scanning measurement method,a 3D laser scanning was carried out underground in a certain mine to accurately measure the 3D spatial coordinates of the engineering rock surface and obtain the three-dimensional laser point cloud data.According to the identified occurrence information of rock mass structural plane,a three-dimensional tunnel model was established using the Discrete Fracture Network(DFN)in 3DEC software.The failure characteristics of the surrounding rocks of the tunnel affected by joint fractures were analyzed.The results show that the structural planes in the tunnel of the mining area are relatively developed,there are basically three groups of dominant structural planes,and the occurrence of the two sub-level dominant structural planes is relatively consistent.The main failure forms of the joint fracture tunnel are edge peeling and roof caving.There are many tension-shear micro fractures distributed on the edge and arch shoulder of the tunnel,and tensile fractures are mainly produced at the end.The research results have achieved the three-dimensional visualization application of mineral resource development,and provide an important basis for the intelligent mining of mines.
Digital measurement of mineJointed rock mass3D laser scanningDiscrete fracture networkFailure characteristic
万方数据
维普
