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With the advancement of the mining face, the method of gradually filling the goaf with filling material is called the filling mining method.
The filling mining method also divides the ore into a two-step mining of the mine house and the pillar, the first mining room and the rear mining column. Pillar mining can be used for filling, and other methods can also be considered.
The mining of the mining house is a layering, the ore is transported out, and then the layer is filled, and then a layer is taken and then a layer is filled. According to this cycle, until the whole mine is finished. One for one charge or two for one charge.