Tóm tắt:

Reducing loss and poverty of useful minerals is one of the most important and urgent tasks not only in Vietnam, but also in the advanced countries in the World. In the article, the author mentioned only a small part of all the technological solutions to reduce the loss coefficient and the beneficial mineral depletion in the coal selection process by reverse bucket hydraulic excavator. By examining and evaluating different coal mining diagrams, we locate the right boundary of mining between the coal and soil to choose the best mining plan for coal seams, and select the most appropriate location of the Coal-Land boundary, optimization of loss factor and poverty.