At the end of the open-pit mining process in large metal mines, the mining model must change from open-pit mining to underground mining, but the mutual interference between the two mining models leads to poor production safety conditions and difficulties in production convergence during the transition period. To solve these technical problems of poor production safety conditions and difficulties in production convergence during the transition period, in this study, based on the case of the Dagu Mountain Mine, a new transition mode of wedge switching for collaborative mining is proposed and established, which is suitable for collaborative mining. This new mining process completely eliminates the boundary pillar and the artificial covering layer, combining the technology of the mining-induced caving method and the technology of deep mining at the bottom of the open-pit. The results show that 1) the optimization of the open-pit boundary reduces the amount of rock stripping, and 2) it achieves a stable transition of collaborative mining capacity. The study shows that the proposed method uses the technologies of the mining-induced caving method in underground mining and deep mining at the bottom of the open pit in open-pit mining, and the method then optimizes the open-pit mining in detail by comparing the advantages of open-pit mining and underground mining. This study provides true and accurate technical support for the transition from open-pit mining to underground mining.

中文翻译：

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露天开采地下铁矿石的方法

在大型金属矿的露天开采过程结束时，采矿模式必须从露天开采转变为地下采矿，但是两种开采模式之间的相互干扰导致生产安全状况较差，并且在生产过程中难以收敛。过渡期。针对过渡时期安全生产条件差，生产衔接困难的技术难题，本研究以大沽山矿为例，提出并建立了楔形切换合作开采的过渡模式，适用于协作式采矿。这种新的采矿工艺完全消除了边界柱和人工覆盖层，结合了采矿诱发的崩落法技术和露天矿底部的深层开采技术。结果表明：1）露天矿边界的优化减少了剥岩量； 2）实现了协同开采能力的稳定过渡。研究表明，该方法在露天开采的地下开采和地下开采的深部开采中采用了采矿诱发崩落法的技术，然后对该方法进行了比较，详细地优化了露天开采露天开采和地下开采的优势。这项研究为从露天开采到地下开采的过渡提供了真实而准确的技术支持。结果表明：1）露天矿边界的优化减少了剥岩量； 2）实现了协同开采能力的稳定过渡。研究表明，该方法在露天开采的地下开采和地下开采的深部开采中采用了采矿诱发崩落法的技术，然后对该方法进行了比较，详细地优化了露天开采露天开采和地下开采的优势。这项研究为从露天开采到地下开采的过渡提供了真实而准确的技术支持。结果表明：1）露天矿边界的优化减少了剥岩量； 2）实现了协同开采能力的稳定过渡。研究表明，该方法在露天开采的地下开采和地下开采的深部开采中采用了采矿诱发崩落法的技术，然后对该方法进行了比较，详细地优化了露天开采露天开采和地下开采的优势。这项研究为从露天开采到地下开采的过渡提供了真实而准确的技术支持。研究表明，该方法在露天开采的地下开采和地下开采的深部开采中采用了采矿诱发崩落法的技术，然后对该方法进行了比较，详细地优化了露天开采露天开采和地下开采的优势。这项研究为从露天开采到地下开采的过渡提供了真实而准确的技术支持。研究表明，该方法在露天开采的地下开采和露天开采的深部开采中采用了采矿诱发崩落法的技术，然后通过比较详细地优化了露天开采露天开采和地下开采的优势。这项研究为从露天开采到地下开采的过渡提供了真实而准确的技术支持。