Significantly improves the accuracy of the cross-section after blasting;
Effectively reduces over-excavation (exceeding the design cross-section) and under-excavation (below the design cross-section), reducing over-excavation by 5%–15% compared to conventional blasting trolleys. This alone results in considerable economic benefits from reduced transportation of lining materials and rockfill;
Reduces auxiliary time for drilling, increasing efficiency by approximately one-quarter;
Achieves coplanar control of the borehole bottom, increasing blasting efficiency by over 5%;
Significantly reduces tunnel excavation costs.