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冬瓜山铜矿圆满完成40万吨垂直矿柱的安全回采

2025-04-17 14:26:37 来源：铜陵有色公众号责任编辑：韩泽楷

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近日，在冬瓜山铜矿大团山工区采矿班实施49次精准大爆破和出矿班两年的持续攻坚下，安全高效完成了井下负610米Ⅳ盘区高达40万吨大型垂直矿柱回采工作，累计回收铜量3654.68吨，创造经济价值上亿元。

该矿柱原在负565米以上盘区回采设计范围内，因顶板暴露面积过大，稳定性变差而留设。矿柱设计宽25米，在33A和33B回采过程中顶板出现失稳，预留1~3排大孔未爆破，矿柱总矿量约49.86万吨，平均地质品位约1.14%。本矿柱空间形态顶部基本在负520米标高，矿柱采用下向大直径深孔阶段空场嗣后充填采矿法。矿柱回采为残矿资源回收利用，两侧均为充填体，东侧最高达90米，有垮落风险，东侧间隔留设2米和4米厚矿壁以保护充填体；西侧空区充填体高度较小，充填体强度较高，以留2米矿壁为主，矿柱中间20米长度留4米厚矿壁以保护充填体。

自2023年3月20日该矿柱首次爆破以来，大团山工区出矿班克服现场潮湿闷热、大块率过高等不利条件，充分利用进口3立方米电动铲运机进行作业，在负610米中段矿石被铲运至溜井，再由负730米中段的牵引电机车运出，截至今年3月底，圆满完成了该矿柱的高效回采。

在矿柱回采过程中，该工区严格监督各进路均衡出矿，严禁进路出空和矿石、充填体混出。到了矿柱回收末期，根据现场实际情况制订了相应方案，实行“一采场一方案”，要求将进路残矿逐个清扫干净，做到资源“吃干榨净”。同时，为了确保矿柱采场后期充填封闭墙的施工安全，该工区在进路扫空前选择进路合适位置预先施工基础锚杆孔。进路扫空后立即用铲车堆放废石、杂物或草包等阻挡物，待所有进路全部结束且采场稳定后，利用预先施工的锚杆孔快速安装钢构、锚网联合挡墙，上述各项措施落实到位后，再开始施工充填封闭墙。目前，该矿柱回采后的空区已顺利进入充填前封闭流程。

此次大型矿柱的回采有效延长了矿山的服务年限，并成功实现了高难度矿石资源的最大回收。

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