1) Operation processWork flow of earthwork opening: measuring lofting → earthwork excavation → loading → transportation to slag yard.2) Excavation and delamination of overburdenThe excavation layer height of overburden is generally 3-5m, and the slag is directly transported by backhoe excavator and 15T dump truck. Backhoe excavator is directly used to repair the slope without drilling and blasting parts. The construction should pay attention to measurement, tracking, inspection and lofting. A protective layer of 30cm thickness should be reserved during backhoe slope repair. The protective layer should be cleaned and repaired manually.