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The authors have revealed particularities in destruction of the rock mass by the system of borehole charges and substantiated the least seismic hazardous blasting schemes which allow decreasing out-contour disturbances and providing more qualitative crushing of rock mass. It has been shown that for the boreholes with 250 mm diameter the least seismic hazardous blasting scheme is one with borehole line placed at the angle of 105? to the bench wall. At that, the stress level in the out-contour rock mass decreases by...

The annual extraction of aggregates in the Czech Republic is between 45 - 50 mega tones. [5]. Many studies for better results of quarries are undertaken. In this paper is solved the question of optimizing. The relationships between different production processes in quarries are very important matter. On the relationships between the manufacturing processes depends the economic effect of operation. The paper presents patterns in the organization of mining, which mutually related. Using computational methods and the...