3D visualization of complicated cavity group under open-pit limit and its application

Because of the existence of complicated cavity group with open-pit limit constitutes a potential hazard for mine safety production,and of the necessity to accurately analyze cavity group and then create conditions for choosing proper prevention and treatment countermeasures so as to plan exploitation of mineral resources reasonably,3D visualization modeling technology of complicated geological bodies based on triangular irregular network(TIN) was studied,and corresponding implementing scheme of 3D visualization of complicated cavity group with open-pit limit on platform of Surpac software was made,then,a case study was discussed.On the foundation of massive field survey,collecting and sorting data,the 3D visualization models of digital terrain models(DTM) of open-pit surface,occurrence state of ore body and complicated gravity group of the mine were built,especially.The results show that transfixion relationship in cavity group is emphatically described in 3D which can be used to logically analyze jointly destructive effect.The spatial relationships among the DTM,ore body and gravity group are made explicit which can be used to analyze the potential hazards of complicated cavity group with open-pit limit and associated destructive effect of cavities,besides,the references for hazard control,safety judgment and designing for open-pit mining can also be obtained by using the model built,the problem of blind mining can be solved and the major safety accidents can be prevented successfully.