軟破復(fù)雜礦巖條件下無底柱分段崩落法拉槽工藝研究及實(shí)踐
[Abstract]:Under the condition of soft breaking complex ore rock, it is very difficult to construct the cutting groove by sublevel caving method without bottom pillar, which is one of the important reasons leading to frequent suspended roof and low ore recovery rate. In view of this difficult problem, an experimental study has been carried out. The field test results show that the quality of the cutting slot can be greatly improved by adopting the technical scheme of single slot formation with parallel sector meso-deep holes under the condition of soft breaking complex ore rock. The annual qualified rate of grooving can be raised from 60% to 80% (calculated according to the number of route lines), the rate of suspended roof can be reduced by 20% (calculated by the number of entry roads), the recovery rate of ore can be increased by 12% as a whole, and it is safe and flexible, which is worthy of reference and application in similar mines.
【作者單位】: 平武縣國(guó)土資源局;東北大學(xué)資源與土木工程學(xué)院;西南科技大學(xué)環(huán)境與資源學(xué)院;
【基金】:國(guó)家自然科學(xué)基金項(xiàng)目(41372301) 四川省教育廳科研項(xiàng)目(16CZ0013、15ZB0124) 綿陽(yáng)市科技計(jì)劃項(xiàng)目(14S-02-6) 西南科技大學(xué)杰出青年科技人才計(jì)劃項(xiàng)目(13zx9109)
【分類號(hào)】:TD853.362
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