【摘要】 采场结构参数的合理选取对机械化程度较低、工艺改造困难的浅孔留矿法尤为重要。为确定浅孔留矿法采场结构参数，提出了联合岩体质量分级、Mathews稳定图法、数值模拟和现场可操作性评价等多种技术方法耦合的综合评价体系。以四川巴中某磁铁矿为工程背景，选取Q系统分类法和修正BQ分类法为Mathews稳定图法和数值模拟提供相应参数支撑，通过撬顶、平场和通风工序耗时评价Mathews稳定图法和数值模拟得出的极限采场结构参数。结果显示，开采矿体厚度为15 m矿体时，基于Mathews稳定图法和数值模拟分析得到采场极限尺寸为15 m×50 m×50 m(倾向长×走向长×采场高),经撬顶、平场和通风等工序可操作性评价，采场极限尺寸优化宜为15 m×40 m×50 m。经实践验证，采场结构参数综合评价体系得出的采场结构参数可满足浅孔留矿法循环作业的安全性和连续性要求，经济效益明显提升。更多还原

【Abstract】 The reasonable selection of stope structural parameters is particularly important for the shallow hole retaining method with low mechanization and difficult process transformation. To determine the structural parameters of the shallow hole retaining method, a comprehensive evaluation system was proposed, which included the rock mass quality classification, the Mathews stability diagram method, the numerical simulation, and the on-site operability evaluation. Taking a magnetite mine in Bazhong City, Sichuan Province as the engineering background, the Q-system classification method and the modified BQ classification method were selected to provide corresponding parameters support for the Mathews stability diagram method and numerical simulation. Meanwhile, the limit stope structure parameters obtained by Mathews stability diagram method and numerical simulation were evaluated by the time consumption on the processes of scaling roof, leveling field, and ventilation. The results show that when the thickness of the ore body is 15 meters, the limit size of the stope is 15 m×50 m×50 m(width×length×height), based on the Mathews stability diagram method and numerical simulation analysis. After evaluating the operability of processes such as scaling roof, leveling field, and ventilation, the limit size of the stope should be 15 m×40 m×50 m. Through practical verification, the stope structural parameters obtained by comprehensive evaluation system can meet the safety and continuity requirements of the shallow hole retaining method, and the economic benefits are significantly improved.更多还原