What are the advantages of open cut construction?

Open cut construction has the following advantages: (1) relatively low cost of construction, construction speed; (2) suitable for a variety of different geological conditions, can effectively reduce the depth of the line; (3) construction process is simple, mature technology, construction safety, construction period is short, construction quality is easy to ensure; (4) waterproofing method is simple, reliable quality. Disadvantages of open-cut method: (1) construction of the surrounding environment and traffic impact. (2) cause a lot of demolition and relocation. (3) the comprehensive cost of the project is higher than the y buried conditions of the mine method.