Mining Safety Act Article 15
To ensure that there is a complete ventilation system in place and that operations personnel can safely enter and exit the mine, the Mineral Right Holder should see to it that at least one downcast shaft and one upcast shaft with proper cross section are installed between the mine pit and the ground surface. The downcast and upcast shaft should have proper air duct connections.
中文原文 礦場安全法第15條
礦業權者為維持工作場所通風系統之完整及作業人員之安全出入，在採礦時，應於礦坑與地表間完成適當截面之入風井（坑）及出風井（坑）至少各一處，入風井（坑）與出風井（坑）並應有適當風道連絡。