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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. It is solved the optimizing of cost on coal quarries also. The situation on stone and coal quarries is different. There are requirements for stone production, but the production of coal is in decrement. Comparison and solving both situations seems to be useful. The relationships between different production proc...

The article deals with the treatment of terrain and the following forestry reclamation in the Erv?nice area situated near the city Most at the foot hills of Ore Mountains. It considers the impal of using secondary energy products for the reclamation of this previously mined area on ground water, surfac ewater, air and noise. The area had previously been used as sands and gravel waste disposal and in the last years efore there clamation there had been some natural restoration of the biotopes on the brought sands ub...