Mining Machinery an overview | ScienceDirect Topics
In conclusion, the definition of highintensity mining is as follows: thick coal seam ( m) mining (top coal caving mining or large mining height), large panel width (L200 m), fast face advance rate (v5 m/d), high output of single unit (510 Mt/a), and H/m less than 185 and damages to the overlying strata and surface are serious.