What is the purpose of open pit blasting? What are the characteristics?

The open-pit mine blasting work is to break down the ore from the whole and break it into a certain degree according to the engineering requirements, throwing it into a certain shape, and the purpose is to provide suitable excavation for the subsequent loading work. The main features of open pit blasting are: the length of the step line, the wide working face, the high mechanization of mining, and the high strength. Generally, there are two or more free faces.