After more than two months of preparation work, the final phase of the rescue operation plan for the collapse accident of the San Jose copper mine in Chile was launched on the evening of October 12th, local time. The Chilean government has made a great deal of meticulous preparations and detailed evaluations to ensure the smooth rescue of the trapped miners, and the possibility of the success of the rescue operation is very high. However, due to a series of uncertain factors, the rescue results are still subject to the following variables.