Around 1900, there were many coal faces in thin seams at small sized coal mines in the Chikuhoregion.
In these mines, the ceilings of the main drives as well as the coal seams were low.
Therefore, when coal skips were loaded with too much coal, they got stuck.
Miners’ wages were determined according to the amount of coal in a skip.
This amount was regulated: one heaping load of coal per skip.
If miners were unable to produce one heaping amount of coal, and only a flat, level amount of coal, their wageswere cut by 20 percent.
Miners working at these low ceilinged mines were out of luck when it came to fair wages.