A mining drill rig; single set up automatic liner, (Leyner). This is an instructional photo for training to drill a standard V cut which was fired first to create a void. This is for raw or untimbered ground. This is a bar and column set up. The column extends to the ceiling and the bar is near the bottom and extends to the right side, Inclusions are shown just above the bar and to the right of the top part of the column. they look like this /.

Underground Jack hammer Drill rig Bisbee Leyner Instructional Mining

Pavlovich, Nicholas

1890-1910

1981.38.106