Meaning: The open pit mining method determines the existence of roof and floor, dirt
band and corner coal. Dry separation technology can be used to recover combustibles
and improve resource utilization. Dry coal preparation has the advantages of no water,
simple process, modular structure, fast production and low operating cost, and is
especially suitable for reject discharge under open pit.
Effect: The coal resource is effectively recovered, the reject is discharged under the
pit, and the ineffective transportation of reject is avoided, which is conducive to energy
conservation and emission reduction. It is an important indicator for green mine
evaluation.
