Abstract:The mechanical drilled blind shafts are generally used to provide blasting-free space for ore-gathering Trough excavation in block caving. However, this technique has the disadvantages of high cost, low efficiency, and poor safety. To solve the construction problems of blind shafts for block caving, taking the Pulang copper mine as an example, this paper presents a one-shot blasting method for blind shaft excavation. Theoretical analysis from key-parameter selection, blasting design, and equipment selection was performed and then verified in the field test. This method has been successfully tested and popularized in the Pulang copper mine. Compared with the traditional method, the construction period of the blind shaft is shortened by 70%, the cost is reduced by 80-90%, and the shaft completion quality is good. The technique of high-efficiency one-shot deep hole blasting for shaft excavation is safe and cost-effective. The application provides an important reference for similar block-caving mines at home and abroad.