本文根据云锡大屯锡矿一坑有底柱分段崩落法的实践,探讨降低贫化和损失的切实有效的途径。结果表明,技术基础资料准确、合理的开采顺序、采切工程的合理布置和严格的放矿管理是降低贫化损失的有力保障。近些年来,云锡大屯锡矿(原松树脚分矿)产量相对前些年成倍的翻番,作为主要的产出坑口,一坑的出矿任务逐年加大,有底柱崩落法是一坑运用最 According to the practice of sub-cavern sub-caving method in a tin mine in Datun, Datong, Yunnan, this paper explores practical and effective ways to reduce depletion and loss. The results show that the accurate and reasonable mining sequence of technical basic information, rational arrangement of cutting and cutting works and strict management of ore discharge are strong guarantees to reduce the depletion loss. In recent years, the output of the Yunnan Tin Xittun tin mine (formerly the Songchu Pinchiao Mine) has doubled from the previous years. As the main output pithead, the pit mining task has been increasing year by year. A pit is used most