| 周建伟,杨润基,卢许佳,高庆,罗刚.崩落法回采工艺的应力变形特征及权重优选研究[J].矿产勘查,2023,14(11):2182-2188 |
| 崩落法回采工艺的应力变形特征及权重优选研究 |
| Research on stress deformation characteristics and weight optimization of caving method mining technology |
| 投稿时间：2022-08-10 修订日期：2022-10-18 |
| DOI：10.20008/j.kckc.202311017 |
| 中文关键词: 无底柱分段崩落法 FLAC3D数值模拟 回采顺序 权重分析 采场稳定性 |
| 英文关键词: pillarless sublevel caving FLAC3D numerical simulation mining sequence weight analysis stope stability |
| 基金项目:本文受四川省科技计划项目（2021YJ0033）资助。 |
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| 中文摘要: |
| 无底柱分段崩落法是金属矿山地下开采中最重要的采矿方法之一，与其他采矿方法相比在空间上具有特殊的结构形式。在实际生产中，由于其所具备的空间结构特殊性，导致其以不同的回采顺序开采矿石时对采场的稳定性影响很大。同时在矿石回采过程中，采场极易形成应力集中的现象，不利于采场的稳定。为此，本文采用FLAC3D数值模拟技术对无底柱分段崩落法经常采用的3种不同回采顺序（各回采进路同时回采、呈“凸”字形回采和阶梯状回采）进行数值研究，研究在3种不同回采顺序下，采场围岩的应力及变形特征，而后将模拟结果通过AHP方法构造判断矩阵进行权重分析。通过大量计算最终得出：无底柱分段崩落法首采阶段覆盖层尚未形成时，应采用“凸”字形阶段状回采顺序；其他分段应采用各进路同时回采的顺序对矿体进行开采，以最大的限度维持采场的稳定性。 |
| 英文摘要: |
| The bottomless pillar segmented caving method is one of the most important mining methods in underground metal mining， and it has a special structural form in space compared to other mining methods. In actual production， due to its unique spatial structure， mining ore in different mining sequences has a significant impact on the stability of the mining site. At the same time， during the process of ore extraction， the mining area is prone to stress concentration， which is not conducive to the stability of the mining area. Therefore， this article uses FLAC3D numerical simulation technology to conduct numerical research on three different mining sequences commonly used in the bottomless pillar segmented collapse method （simultaneous mining of each mining route， convex shaped mining， and stepped mining）， studying the stress and deformation characteristics of the surrounding rock in the mining area under three different mining sequences. Then， the simulation results are used to construct a judgment matrix using the AHP method for weight analysis. Through extensive calculations， it is ultimately concluded that when the cover layer has not yet formed during the first mining stage of the pillar less segmented caving method， a "convex" shaped stage mining sequence should be adopted； The mining of the ore body should be carried out in the order of simultaneous mining of each approach in other sections， in order to maintain the stability of the mining area to the greatest extent possible. |
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