Storms are a major threat to deep-sea mining activities on the high seas. Deep-sea mining takes a long time to prepare to avoid storms, and in some cases it is inevitable to evacuate to avoid storms with risers hung-off. In this work, the evacuation process with risers hung-off is studied, and mechanical properties such as stress and upper rotation of the mining riser system during the process are analyzed. Operation parameters such as speed and heading suitable for evacuation are studied. Evacuation routes of mining ship are optimized based on an improved A* algorithm, and the influencing fac...
