The Study Of Dynamic Stripping Technology Based On 3D Geological Model With Panjiatian Iron Mine As An Example

With the rapid development of computer 3D visualization technology,3D visual modeling technology has been more widely used in all areas of society.For the mining industry,the traditional informatization way has' t met the requirements of the development of the mine,design and management of mine production has become an inevitable trend under the environment of the three dimensional,and it is also the key to realize digital mine construction.Mine 3D geological madeling is the core of digital mine construction,on this basis,combining visualization technology for mine mining design,and it can also provide accurate,intuitive spatial information for the spatial distribution of mine resources,mine design,stripping plan as well as the mining process simulation,etc.in the true 3D space.This paper though the collection of mine exploration and production data,and based on the theory of three-dimensional geological modeling method research,from the perspective of the data processing,applies the improved FastICA to geochemical analysis data processing,which reflect the distribution of elements in space,and established the system of geological body boundary delineation method based on FastICA algorithm,at the same time using drilling data and profile data which is the main data source of 3D geological modeling,constructing the three-dimensional entity surface model by using multi contour triangular mesh reconstruction algorithm,and based on the perimeter projection method generates triangulation at the same time proceed triangle surface intersection test,yet the problem of the connection between adjacent section can be solved by adopting the way that judgment first to add auxiliary line,through implement the way of local optimization to improve the speed of building ore bady 3D surface model.Meanwhile,by adding branch line of processing conditions to realize the construction of complex ore body surface model.Paper constructs the ore body internal attribute model by adopting modeling method based on regular block,realizes grade data interpolation and gets the grade distribution in three dimensions by using the kriging interpolation algorithm(TFe,TiO2,V2O5),then combining with the ore body three-dimensional entity model and inside and outside the polyhedron adopt judgment Feito-Torres algorithm,solves the problem of ore body boundary constraint processing technology,and realize building grade block model rapidly,provide data support for later calculation of quantities by three dimensional segment model.Paper based on the characteristics of the open pit in step,terrain characteristic line,the top line and the slope bottom line can be extracted through the stope survey acceptance data,and build a virtual stope situation model will using the perimeter projection method reconstruction of stope stage and boundary model,On this basis,combining with 3D block model,according to the delineation way of engineering location,relevant quantities calculation of the whole stope,specify the steps and specified area can be realized by combing the complex mathematical calculation with mining design,and 3D visualization simulation also realized,based on implements steps,meanwhile,the efficiency of the stripping planning process and quality are improved.In addition,based on 3D geological modeling and stripping planning process,the design and implementation of 3D stripping auxiliary system are carried out with the method of separating model and visualization rendering.The system can be divided into 4 parts including 3D geological modeling,3D stope modeling,query management of data and the stripping planning,by using QT and C++ respectively as a development platform and a programming language,combining with OpenGL,the development and implementation of each module can be conducted with the object-oriented approach.The Panjiatian iron mine as the research area,through the construction of 3D geological modeling and open-pit 3D model,realization of stripping and mining plan in 3D environment,which provides guidance for mining stripping plan.The main results of this paper :(1)To establish a set of system of geological body boundary delineation method based on FasrICA algorithm.The proplems that geological boundary delineation of geological saction,the FastICA algorithm is applied to the division of data generated by algorithm separation can be respectively solved by introducing correlation coefficient and using cumulative frequency method,then the spatial distribution characteristics of the element can be embodied well,and combing the geological background with metallogenic regularity to provide a basis for ore body.(2)To develop a scheme about making the mining stripping plan based on 3D geological model.The vast majority of domestic open-pit mine is based on two-dimensional CAD graphics for mining design,geological model and three dimensional model of stope are constructed by using 3D modeling and visualization technology,and realized the geological and mining information from the plane to the three-dimensioal transformation.At the same time,it has obtained the good effect in the practical application of Panjiatian iron ore.