In traditional flexible protection methods, we often use slope protection surfaces. It is: mortar, three-layer soil and other plastering, spraying, spraying concrete, masonry retaining wall, anchor shotcrete slope protection, anchor shotcrete slope protection. This method is mainly used to protect the rock from the erosion of the excavation slope, such as weathering, chipping and some stones. The slope to be protected should have satisfactory stability, and unstable slopes should be supported before protection. There are various types of retaining structures such as retaining walls, anchored retaining walls and anti-skid piles.

These retention structures are both protective and have enhanced slopes. The slope is protected by engineering methods, and the intensity effect is sought through fire, which destroys the ecology, and the phenomenon is poor. Also, concrete and masonry surfaces will weather and age over time, resulting in damage and high post-treatment costs.