Abstract:

The article introduces some technical and technological solutions to modernize the exploitation of open-cast coa! to meet the output for the development of VietnarrVs coal industry til! 202Ơ and the tuture. It also shows the reiationship between the suiiace border size and the finai exploitation depth of quarries, bottoms of which are excavated ạt the position belovv natural drain level. This is done with the aim of ensuring saíety, recovering the maximum mineral amount underneath the ground as well as reduction in land occupancy from developing those quarries.