Dr. Rakesh Kumar Khali, Vice President- Operations (Tunnel & UG Works), and Naveen Bahuguna, Design Lead- Tunnel & Underground projects, G R Infraprojects Limited, present a selection of excavation sequences, control blasting techniques with heading & benching of a powerhouse cavern for different ground conditions, continuous monitoring of blasting performance and optimize blasting design to maintain the designed PPV and retain the designed geometry of the cavern. They also discuss the performance monitoring of the cavern during excavation and the construction techniques used to minimize the blasting damage of the surrounding rock mass.
