'White Oak preparation begins when the machine leaves and the miner is ready to shoot down his coal. The shooting inspector on the left has not only located the hole for the miner to drill, but instructed him as to what angle he must bore his hole to contain the necessary explosive used in dislodging the coal from the seam. The kerf made by the cutting machine is plaining visible in this picture and you will note the cuttings of bug dust have been removed before the coal is shot. The length of the auger used by the miner and the width of the bit which determines the size of the hole bored, is also carefully regulated.'
Subjects:
Coal mines and mining--Explosives., Coal miners., Coal Mines and Mining--Miners at Work.
