Blasting and layered trenching method for two ends of strip mine

The invention discloses a strip mine two-end blasting layered trenching method, which comprises the steps of perforating, blasting, shoveling and trenching, and comprises the following steps: firstly, dividing a trenching area into five blasting areas, and arranging a drainage pit in the initial blasting area with the maximum depth; perforating and blasting operations are carried out in sequence from two sides to the middle, and then a temporary drainage pit and an access ditch are dug; the shoveling and trenching operations are carried out in layers, and when the current horizontal shoveling and trenching operations are completed, the operation of the next layer is continued, so that the depth of the drainage pit can be ensured to be the lowest all the time, and the influence of mine gushing water on construction is reduced. The two-end blasting layered trenching method for the strip mine has the advantages that the trenching efficiency is improved, the construction time is shortened, the new-level trenching