大结构参数无底柱分段崩落法放矿方式与结构参数研究

发布时间：2018-01-16 12:04

  本文关键词：大结构参数无底柱分段崩落法放矿方式与结构参数研究　出处：《西南科技大学》2016年硕士论文　论文类型：学位论文

  更多相关文章： 无底柱分段崩落法 大结构参数 放矿方式 结构参数优化 采场稳定性

【摘要】：随着大型先进的凿岩铲装设备逐渐被引进到我国,无底柱分段崩落法采场结构参数日益大型化,但矿石贫化率大、回收效果不佳的问题依然普遍存在。究其原因,与大结构参数条件下无底柱分段崩落法合理放矿方式及结构参数研究不充分、缺乏科学理论及技术指导等因素有密切关系。本论文结合攀钢兰尖铁矿尖山矿区及酒钢镜铁山矿桦树沟矿区大结构参数无底柱分段崩落法结构参数及放矿方式优化研究项目的研究需要,开展了对大结构参数无底柱分段崩落法合理放矿方式与结构参数研究。论文首先对无底柱分段崩落法放矿方式以及国内外大结构参数无底柱分段崩落法的研究现状进行了归纳与总结,讨论了现行放矿方式存在的问题及影响,对比分析了大结构参数条件下无贫化放矿的合理性并通过物理实验模拟验证了大结构参数条件下无贫化放矿方式在技术上的可行性及经济上的优越性;同时,针对目前加大结构参数研究采用的原则和方法特别是基于“椭球体排列”理论提出的“大间距结构参数方案”存在的问题进行了分析研究,提出了更为科学合理的大结构参数分析及计算方法,并且结合酒泉钢铁镜铁山矿桦树沟矿区的矿体条件,开展了大结构参数条件下无底柱分段崩落法合理放矿方式及结构参数优化研究。研究表明,桦树沟矿区V矿体无底柱分段崩落法采用无贫化放矿方式较矿山原计划的截止品位与低贫化组合放矿方式矿石回收效果更好;同时,理论和实验研究表明,针对桦树沟矿区的矿体条件,20m×18m×2.8m和20m×20m×3.0m(分段高×进路间距×崩矿步距)的参数都是目前较优的结构参数;从操作层面上讲,建议先将矿山目前的15m×18m×2.2m结构参数调整为20m×18m×2.8m。如有必要,可在前期结构参数调整顺利完成后再实施20m×20m×3.0m的结构参数。此外,论文通过抗压实验进行了采场稳定性研究,加大采场结构参数包括分段高度和进路间距都可以在一定程度上提高地下采场结构的稳定性,有利于矿山生产和矿石的回收。
[Abstract]:With the introduction of large-scale advanced drilling and shovel equipment to China, the stope structure parameters of sublevel caving without bottom pillar are becoming larger and larger, but the ore dilution rate is large. The problem of poor recovery effect is still widespread. The reason is that the reasonable drawing mode and structural parameters of sublevel caving method without bottom pillar under the condition of large structural parameters are not sufficient. Lack of scientific theory and technical guidance is closely related to this paper combined with Panzhihua Iron and Steel Lanjian Iron Mine Jianshan mining area and Jiugang Jingtieshan mine Huashugou mining area large structure parameters without bottom pillar sublevel caving method structure parameters and ore drawing method excellent. The research needs of the project. The reasonable drawing mode and structure parameter of large structure parameter sublevel caving without bottom pillar are studied. Firstly, the ore drawing mode of sublevel caving without bottom pillar at home and abroad and the sublevel caving method without bottom pillar with large structural parameters are studied in this paper. It is summarized and summarized. The problems and effects of current drawing methods are discussed. The rationality of ore drawing without dilution under the condition of large structural parameters is comparatively analyzed and the technical feasibility and economic superiority of ore drawing without dilution under the condition of large structural parameters are verified by physical experiment simulation. At the same time, the principles and methods used in the study of structural parameters are analyzed and studied, especially the problems existing in the "large spacing structural parameter scheme" based on the theory of "ellipsoid arrangement". A more scientific and reasonable analysis and calculation method of large structural parameters is put forward and combined with the orebody conditions of Huashugou mining area of Jingtieshan Mine Jiuquan Iron & Steel Co., Ltd. The reasonable drawing mode and structural parameters optimization of sublevel caving method without bottom pillar under the condition of large structural parameters are studied. In Huashugou mining area, the method of sublevel caving without bottom pillar in V ore body is better than the original plan of cutoff grade and low dilution combined drawing method in ore recovery. At the same time, theoretical and experimental studies show that the orebody conditions of Huashugou mining area. The parameters of 20m 脳 18m 脳 2.8m and 20m 脳 20m 脳 3.0m (segmental high 脳 path spacing 脳 caving distance) are all better structural parameters at present. From the operation level, it is suggested that the present structural parameters of 15m 脳 18m 脳 2.2m should be adjusted to 20m 脳 18m 脳 2.8m. if necessary. The structural parameters of 20m 脳 20m 脳 3.0m can be carried out after the adjustment of structural parameters is completed successfully. In addition, the stope stability is studied by compression test. The stability of underground stope structure can be improved to a certain extent by increasing the structural parameters of stope, including subsection height and approach distance, which is beneficial to mine production and ore recovery.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD853.362
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本文编号：1433017