I don't know if the content about underground fissures and gemstone mines has been edited, but there are indeed no more detailed materials in the library. Besides, the mining accidents that frequently happened more than a hundred years ago are just briefly mentioned.
However, Xu Huo later found some numerical data in a data file. From about 150 years ago to 120 years ago, there were over ten thousand mining accidents recorded. This means there were more than 300 each year on average, effectively happening almost daily in Zone 019 during that time.
This number looks incredibly high, but after a new mining system was introduced 120 years ago, the accident rate plummeted dramatically. This coincides with the years following Master Soran's birth, marking the beginning of a truly "perfect division" in Zone 019.
