Innovation techniques of complex structure deposits underground mining
The article shows basic scientific and practice results for the development and introduction of innovation techniques of complex structure deposits underground mining, effectiveness increase of their development due to the application of room system with consolidation stowing and block underground leaching of uranium out of rock ores. The validity of ore dressing scheme is confirmed (maximum deviation of actually measured class -25+0 is 7,2 %). It is determined, that the most intense percolation leaching happens under the grain-size class of ore fractions -100+0 mm. For the conditions of Michurin mineral deposit (the Ukraine), by condition of leaching, the output of this fraction at the broken ore is recommended over 90 %. Less strongly and more protractedly metals are extracted out of the fractions -200+100 mm. It is determined, that the breaking of ores with the help of deep-hole charges with the diameter 0,085 and 0,105 m is characterized by almost the same fineness ratio as 0,067 m wells diameter, however under the smaller specific consumption of explosives. Transfer to drilling over the rock ore with the wells of 0,085 m diameter is recommended.