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无底柱分段崩落法在我国矿山,特别是铁矿山得到了广泛的应用,对它的评价已不必重述。本文从生产实践和模拟实验中,进一步对合理结构参数问题作些探讨。一、镜铁山桦树沟矿区是我国引用无底柱分段崩落法最早的大型铁矿之一。桦树沟矿区,矿床赋存于含铁千枚岩系中,整合于黑灰色与灰绿色千枚岩之间现开采1—Ⅱ、Ⅲ—Ⅳ矿带各为一组向斜
Subsidence-free subsidence caving method has been widely used in our country’s mines, especially iron mines, and its evaluation has not been repeated. In this paper, from the production practice and simulation experiments, to further explore the reasonable structural parameters. First, the mirror Tieshan Huashugou mine area is China’s first pillar of subsided caving method of one of the earliest large-scale iron ore. In the birchugou mining area, the ore deposits occur in the phyllite-bearing phyllite series, and the mineralization of the 1-Ⅱ and Ⅲ-Ⅳ mineral deposits integrated between the dark gray-gray-green phyllite is a set of synclines