Cave In
By the time dawn arrived, Berengar was already awake and hard at work overseeing the mines' construction. He acted like a true overseer as he issued orders left and right. If one way within the vicinity, he could feel the ground shaking and the sounds of explosions as he commanded the workforce he brought with him to blast their way through the solid portions of rock with gunpowder caskets.
The debris was rapidly cleared, and support beams were put in place to prevent a collapse. This was how Berengar spent the entirety of his time during the initial week after his arrival. He would personally go into the mining shafts to inspect the progress several times a day at regular intervals.