An intelligent optimization method for smooth blasting holes in tunnels in layered rock mass

Abstract

The invention relates to the technical field of underground engineering, and in particular to an intelligent optimization method for smooth blasting blastholes in a tunnel in a layered rock mass. Firstly, according to the surrounding rock grade, blastholes on a tunnel face are arranged according to a conventional method. Then, the angle between the bedding plane of the tunnel face and a tunnel design contour line is identified by computer image recognition technology and an algorithm, and a maximum angle area where the bedding plane has little influence on the smooth blasting, a minimum angle area where the bedding plane has little influence on the smooth blasting, and a most unfavorable position where the bedding plane has little influence on the smooth blasting effect are obtained. Then, according to the calculation results, the blastholes are offset optimized to obtain optimized blasthole positions. Through the above optimization steps, the influence of the bedding plane on the blasting effect of surrounding holes during blasting is effectively reduced, thereby improving the excavation effect of the layered rock mass tunnel blasting, reducing the overconsumption of initial support shotcrete, and saving the tunnel construction cost.

Images