“sublevel caving method without sill pillar”的概念、定义、翻译、参考文献-科学参考

单词	sublevel caving method without sill pillar
释义	sublevel caving method without sill pillar Encyclopedia 工学阶段崩落采矿法释 sublevel caving method without sill pillar无底柱分段崩落采矿法将阶段划分为分段后，自上而下逐步进行分段崩落回采矿石的采矿方法。分段下部不设由专用出矿巷道所构成的底部结构，分段的凿岩、崩矿和出矿工作在同一个分段回采巷道中顺序进行，以较小的崩矿步距向崩落区进行挤压爆破，崩落的矿石在松散覆岩下，自回采巷道的端部直接放出，利用装载设备运至溜井，再由矿石溜井溜放至阶段脉外运输巷。
随便看	health effects of fluorine health effects of food agricultural chemicals residues health effects of food contamination health effects of food contamination by organophosphates pesticide health effects of food contamination by poisonous heavy metals health effects of food contamination by polychlorinated biphenyls health effects of formaldehyde pollution health effects of high altitude environment health effects of high temperature environment health effects of hydrogen sulfide health effects of indoor microclimate health effects of laser health effects of lead pollution health effects of legionella pollution health effects of light pollution health effects of mercury health effects of mold pollution health effects of mould pollution health effects of nitrogen oxides pollution health effects of noise health effects of ozone pollution health effects of phenol health effects of photochemical smog health effects of physical agents health effects of radon

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