Combined Method of Coal Mining in the Opening of Shallow Layers as a Direction of Innovative Development of Geotechnology
Crafts In recent years, there has been a decline in the efficiency of coal mining by traditional methods.On the one hand, the volume of coal outside the contour of the cut, which is economically impractical for open-pit mining, is increasing.On the other hand, when using underground geotechnology, the cost of production exceeds the cost of performi