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Sublevel caving since the mid-sixties started in our country, in metal mines rapid promotion, especially in the more extensive iron mines, now accounts for about 70% of the underground mining of iron ore production.
Compared with the sublevel caving method of the bottom column, the most characteristic feature of the method is that there is no bottom structure composed of special mining roadway in the lower part of the section; the sections of rock drilling, collapse and mining are all in the mining Conducted in the roll. As a result, the structure of the mining method can be greatly simplified, creating favorable conditions for the use of trolley-free equipment and ensuring that workers work under safe conditions.
Compared with the sublevel caving method of the bottom column, the most characteristic feature of the method is that there is no bottom structure composed of special mining roadway in the lower part of the section; the sections of rock drilling, collapse and mining are all in the mining Conducted in the roll. As a result, the structure of the mining method can be greatly simplified, creating favorable conditions for the use of trolley-free equipment and ensuring that workers work under safe conditions.
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