A sitting dog?. The headframe has this architecture beacause of the shaft that is inclined 45 degrees and not vertical as in most mines.

As you see the headframe is also inclined 45 degrees.

Since the two mines are now connected their ground water table is common. When the mines were shut down and the pumping was stopped, the M-mine (lies lower) was totally submerged and water started comming up from the mine. The M-mine became a spring.