Application of controlled blasting technology in mountain excavation under complex conditions

Abstract

The blasting conditions of the site leveling project of a green power and renewable energy limited company are extremely complex. There are construction facilities on both sides of the excavated hill, and expressways and county roads on the front of the excavated hill. In order to control the impact of rolling stones, blasting vibration, blasting flying stones on surrounding buildings, bridges and culverts, pre-embedded industrial water pipes, highways and roadbeds during the excavation of mountain bodies, precise controlled blasting and comprehensive vibration reduction techniques such as weak loosening, controlling the maximum single-shot (single-segment) charge, hole-by-hole blasting, dispersed charge sectional blasting, axial spacing and radial uncoupled charge are proposed. Pre-splitting blasting technology is used to stabilize the slope in slope engineering and trench blasting technology is used in excavation of cut-off ditch. The technology guarantees the normal opening of the frontal expressway and county road during the excavation operation, and does not affect the safe production of the company. This technology guarantees that the excavation of mountain body will not affect the normal opening of frontal expressway and county road, and will not affect the safety of production of the company.