Determination of drilling and blasting parameters considering the stress-strain state of rock ores

deterMinAtion of drillinG And BlAStinG PArAMeterS ConSiderinG the StreSS-StrAin StAte of roCk oreSPurpose.Enhancing methods for determining parameters of drilling and blasting operations considering the stressstrain state of rocks.Methodology.Dependency of the inclined exposure dip on the stressstrain state of rocks to be caved is determined by the analytical research technique and mathematical modeling applying the finite element method.findings.The work offers methods for determining the energy intensity factor for breaking ores onto the inclined exposure which considers the exposure dip while correcting drilling and blasting parameters.There are also offered calculated numerical limits for the above factor.originality.The scientific novelty consists in determining numerical values of the energy intensity factor for break ing the rock massif considering its stressstrain state when caving onto an inclined exposure (compensation area) taking into account its dip.The work suggests limiting the range of obtained numerical values of the factor when breaking the massif onto any type of exposures.Practical value.Drilling and blasting parameters can be corrected depending on changes of the ore massif stress strain state when caving it onto any type of exposures (horizontal, vertical or inclined).The dedicated computer program created enables immediate acquisition of basic drilling and blasting parameters for particular conditions and analysis of predicted values of fragmentation of the massif to be caved.keywords: drilling and blasting parameters, stress-strain state of the massif