Disadvantages of sublevel caving without sill pillar lie in high ore loss and dilution as well as difficult control of ore loss and dilution.

无底柱分段崩落采矿法存在损失贫化大和损失贫化难以控制的缺点。

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Compared with other production section, south section ore scale, shape and occurrence are different, and it is difficult to control mining dilution rate in this section.

狮岭南地段矿体规模、形态、产状特征与其他主生产地段相比，差异很大，该地段采矿贫化率较难控制。

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