Maltsev D. Blast-hole drilling parameters justification during destruction of massif that contains uranium ore

The results of theoretical and experimental studies of development new parame-ters of blast-hole drilling during destruction of massif which contains uranium ore dur-ing mining out the deposits by underground mining in the field Vatutinske on the mine "Smolinska" SE "Eastern mining dressing plant" (SE "EMDP") are defended. Research methods had been justified and described for determining the strain-stress state of the massif for surrounding massif around face chambers. Methodology are developed to perform theoretical studies using thermodynamic method for conduct-ing physical research - modeling on equivalent materials. The method using surveying for the industrial researches had been chosen. Take into account the changes in the stress-strain state of the massif that contains the face chamber, increasing coefficients are obtained for determining line of minimal resistance to 1.5 times and the distance between the holes to 1.4 times the middle part of the chamber in 78% or more than project dimensions of face chamber. Patterns of deformation law spreading and destructions in the massif had been identified. Ade-quacy patterns are confirmed by satisfactory convergence of the results obtained by thermodynamic method for modeling on equivalent materials and methods of survey-ing. Technological solutions for rationalization of blast-hole drilling and concrete changes in the design parameters of the elements of location network holes in the chamber had been proposed. The real economic effect had amounted to 597 thousand UAH for one face chamber of medium size. The results of researches can be used not only in the mine "Smolinskaya" SE "EMDP" and in other mines that obtain uranium ore, lying in albitites with coefficients strength of ores and rocks within 12 - 18 based on a scale of prof. MM Protodyako-nova.