KRS 352.060: Rock-dusting.

The following rules shall govern in the rock-dusting of mines:

(1) All mines, or parts of mines, or sections thereof, shall be rock -dusted if conditions

are found to be dusty or hazardous, after proper inspection. In the event such

conditions are found to exist, then the commissioner or his authorized

representative shall require the necessary rock-dusting to make the mine, part of the

mine, or section safe.

(2) In all mines, accumulations of excessive loose coal and fine dry coal dust shall be

removed from the mine, and all operating sections kept thoroughly rock-dusted, and

the dust on the mine floor allayed by methods approved by the commissioner, but in

every mine, or in any part or section thereof, rock -dusting shall be applied to

maintain at all times a minimum percentage of sixty -five percent (65%) of

noncombustible matter to within forty (40) feet of the faces, including last open

crosscuts, and under certain special conditions the department may require that

places be rock-dusted to the faces, and that additional rock-dust be added.