1. For mountain excavation under general rock geological conditions, deep-hole bench controlled blasting shall be carried out according to the bench height of 8m from top to bottom. By adjusting the hole arrangement mode, the collapse direction, range, height and looseness of the blasting pile can be controlled to ensure the stability of the loading platform. Moreover, 10 can be quickly put into drilling and blasting production, forming a balanced operation cycle of drilling and blasting transportation and continuous mechanized construction capacity. During mountain excavation, slope shall be put upward according to the design edge, and each slope shall be trimmed according to the ratio of 1: 0.3, and the height of each step shall be controlled at 8m, and finally the top line of the slope shall be determined. During blasting construction, according to the formed steps, the steps are pushed down from the top of blasting to the outer boundary. The width of each working platform is 2m, and the steps below can be excavated. The length should be full, and 2 ~ 3 steps should be formed from top to bottom to avoid mutual interference between construction machinery.

2. The mountain excavation within the excavation boundary of about 10 ~ 15m shall be determined according to the rock geological conditions revealed by the upper excavation. When there is weak interlayer or complex geological conditions, shallow hole blasting construction is adopted to ensure the safety and stability of mountain excavation slope.