The mines are harvested in stages or in sections, with horizontal or vertical stratification, and the ore that has fallen out is transported out of the mine roadway in the bottom column by its own weight. After the mining house is finished, the intermediate column, the top column and the bottom column of the upper stage are recovered by different methods, and the goaf is processed at the same time.
This method is applicable to the stable inclined and steeply inclined thick ore bodies of mining rocks. There are two schemes of section rock drilling and stage rock drilling when vertically layering ore.
Disadvantages: In the large amount of work, each section must dig a section of transport lanes, cutting lanes, rock drilling roadway. This mining method will become a widely used method with the further development and promotion of trackless equipment in China.
Advantages: Due to the segmented mining method, the segmented mining method can use high-efficiency trackless shipping equipment, which is flexible in application and high in mining intensity. At the same time, after the mining of the section mining, it is allowed to immediately return to the mining column and treat the goaf, which not only improves the ore recovery rate of the pillar, but also processes the goaf, and creates conditions for the next section of mining.
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