The initial cost-savings evaluation focuses on the non-active sections of the mines where a long-lasting material could reduce the reapplication maintenance to once daily, weekly, or even less depending on the amount of float coal
dust present in the area.
Some works (Honaker 1996, Barraza & Pineres 2005) obtained float coal
fractions having high concentration of vitrinite maceral using a flotation process in basic conditions.
Float Coal Dust Explosion Hazards, NIOSH Technology News, Issue No.
P13-V-11, Program for Regular Cleanup and Removal of Accumulations of Coal and Float Coal Dust, Loose Coal, and Other Combustibles, issued 12/18/13.
Inspectors did not consistently identify deficiencies in the mine operator's program for cleaning up accumulations of loose coal, coal dust and float coal
The fact that rock dust is heavier than coal dust forces the float coal
to fall to the floor.
Violations include illegally providing advance notice to miners of MSHA inspections; failing to properly conduct required examinations; allowing hazardous levels of loose coal, coal dust and float coal
dust to accumulate; failing to adequately apply rock dust to the mine; failing to adequately train miners; and failing to comply with approved ventilation plans and approved roof control plans.