Study On Key Technology Of Mining Design And Production Planning Based On 3d Visualization System

With the rapid development of information technology, it has been widely applied in all fields of society. Therefore, the informatization and improvement of traditional industries as well as the mining industry become the general trend. It is inevitable that digital mining is the innovation and development of mining industry.As a very important part of mine construction, the design of Mining Engineering is the basis for all work. The quality of the design will directly affect the schedule, cost, productivity and overall economic efficiency of the construction project. Mine is a true three-dimensional geographical/geological environment, so digital mining should be designed based on three-dimensional geological body and manual project modeling.The development of three-dimensional visualization technology and modeling technologies offer a favorable environment for mining design. In three-dimensional environment, the spatial distribution and spatial relation of open-pit mine and underground excavation projects will be perspicuous. In addition, three-dimensional geological block model can provide a rapid calculation model for volume and reserves calculation, engineering diagrams, which include laneway construction,stope blasting and production planning, are the task of mining design. In the process, mining design is closely associated with various complicated calculations, such as laneway design, stope design, blasting design, open-pit mine optimization and project acceptance. Therefore, the integration of complicated calculations and mining design improve thed design efficiency and quality based on the geologic body model.According to the specific requirement of mining design, this paper focused on the key technologies above-mentioned; the principle contents are described as follows:(1)The selection of 3D entity model for mining design. The core object of mining design is the complicated geologic body, but a mixed model can not meet the needs of mining design. Therefore, from the perspectives of data storage and practicability, this paper adopted the surface model based on TIN to represent the boundary, surface, artificial engineering; and used block model based on octree to represent the property of geologic body. Meanwhile, this paper put forward an algorithm for generation of profile based on the idea of entity cutting based on plane implicit function and regional reorganization technology.(2)The key technologies of laneway design contain section design,support design and fork design; This paper put forward partial modeling method and entire modeling method for laneway, and proposed an algorithm for generation of double-line laneway automatically based on media line. The realization of methods mentioned above provided new methods for virtual walkthrough the volumn estimation of excavation projects and construction diagrams.(3)The key technologies of underground mining design contain stope design,bottom structure design and blasting design; This paper proposed arbitrary cutting algorithm for 3D entity based on the TriCut algorithm and presented an algorithm for the contour extraction of open and closed 3D entity. According to the extraction of contour, the projection of geologic body was automatically generated.(4)The model and key algorithm of optimization for open-pit mine has been studied. Based on a newly improved geometric constraint model, this paper proposed a new optimization algorithm of open-pit limit, which provides an effective way for solving the problems of open-pit limit optimization of polygonal slope angle under complex geological condition. This paper presented a cost flow based mining cone model, which assembles the positive value blocks and the negative value blocks in the mining cone by adopting the method of graph theory, making it is possible to solve the problems of production planning of large scale open-pit mining by greatly decreasing the number of variables in the mixed-integer programming model and lower the computational complexity. In order to improve the precision and the efficiency for plotting slope line for open-pit mine, a method for automatic generation of slope line was presented according to the characteristics of open-pit mine data.(5)Algotirhm for reconstruction of surface,open-pit mine and laneway were propsed. In order to resolve the proplem of complicated operation on curve reconstruction of open-pit mine, a method for generation of curves of open-pit mine was put forward based on the Vorni diagram and Triangulation. A hierarchical modeling method for laneway entities based on boundary lines was proposed. In order to improve the efficiency and accuracy, algorithms for generation of laneway were put forward by adopting the methods of drawing pace, section and waist line.(6) According to the basic principles of mine production and the trait of the system of production plan scheduling, technology route and esign flow of production planning was pointed out. Technologies for 3D entity detection the optimization technique for task sequencing and production path search were put forward.The achievements stated in this paper have solved key technologies and difficult issues of 3D mining designing and production planning, and provided technocial support for digital mining on 3D environment.