In this article describes the experience of block modeling Gorevskoe deposit. The main purpose is to estimation the economic efficiency of extraction deposit with using mining and geological information system Micromine. The article describes four scenarios for reserve development of Gorevskoe deposit:

1)                 Mining of ore bodies located under the Angara river

2)                 Without mining of ore bodies located under the Angara river

3)                 Mining of ore bodies located under the Angara river with transfer processing plant

4)                 Mining of ore bodies located under the Angara river, with combine open pit and underground mining.

The evaluation of all scenarios is the most cost-beneficial scenario is mining of ore bodies located under the Angara river with transfer processing plant.