Construction And Application Of3D Model Of The Open-pit Stope

The open-pit mining process is carried out in accordance with the stripping process, thespatial and temporal development process of the mining engineering essentially is the timedimension of dynamic change process of the open stope3D geographic-spatial information.Technical work no matter mining design, production planning, check-and-acceptancemeasurement, or production management, are processing and control process of open-pit3Dgeographic-spatial information data that descripes stripping, mining, exclusive miningengineering spatio-temporal location, the open-pit3D model construction has importanttheoretical and practical significance, the model will be important basic geographic-spatial dataof the open-pit mining and provides important basic geographic-spatial information and decisionsupport for open-pit production. In general, the following tasks have been completed:(1) The3D data acquisition of the open-pit stope and dump by advanced GPS-RTKtechnology, and reasonable data coding, improves the level of automation of the indoor dataprocessing, forms present situation stope plan through logical Inspection and correction andinteractive editing of data.(2) Due to the complicated terrain features of open pit stope,the model construction shouldfully consider the corresponding constraint condition, the paper proposes an algorithm forconstrained Delaunay triangulation establishment within one step.In this algorithm,constrainedDelaunay triangulation was finally generated within boundary,through spatial dataextraction,topological relations generation and spatial indexing generation, greatly improvemodeling accuracy and the classification volume accuracy, possesses actual theoreticalsignificance and application value.(3) Because of continuous change of the stope geographic-spatial data caused by open-pitmining process, the stope3D model update techniques and methods becomes the keytechnology.The paper proposes the concept of extended boundary,Using the extended boundaryand the construction algorithm of TIN,part model generation and seamless splicing between partmodel and whole model could be achieved for the whole model update of DEM at last.(4) According to the high-precision3D model of the open-pit stope and dump acquired bythe monthly check-and-acceptance measurement,the paper establishes the stope spatio-temporaldatabase with essential status revision model, achieves precise calculation of the stope exploitation volume;Combination of Virtual Reality technology, actualizes theexploitation-process playback and production-plan ahead demonstration, establishes theframework and platform of basic geographic-spatial information for the digital open-pitconstruction.