尖山矿区倾斜—急倾斜中厚矿体采场结构参数研究

发布时间：2018-10-17 10:12

【摘要】：尖山矿区倾斜一急倾斜中厚矿体,在放矿过程中要受到上下盘边壁的影响,导致其下盘残留量过大,矿石的损失贫化严重等问题。在倾斜-急倾斜中厚矿体采用无底柱分段崩落法开采,崩落散体在放矿过程中受到上下盘边壁的影响,放出体发生变异,目前国内外对该条件下散体流动规律尚缺乏研究。本文以降低尖山矿区急倾斜中厚矿体损失贫化为目的,结合矿体产状和回采工艺,以物理相似模拟为研究手段,采用改进的达孔量法和3Dmine软件完成了倾斜边壁条件下放出体的圈定,并通过实验得到了残留体的形态,分析了崩落矿岩在移动过程中受到上下盘边壁影响下放出体形态特征规律、矿岩散体移动规律及下盘矿石残留体特征。主要工作如下：通过查阅资料,收集了区域地质资料、矿体赋存特征、工程地质及水文地质特征资料。根据尖山矿区急倾斜中厚矿体产状特征,采用相似模型试验,开展了两个分段矿石的模拟实验,对矿石的损失贫化情况进行了测定分析。通过以上工作,得到如下结论：通过急倾斜中厚矿体端部放出体实验绘制出放出体形态,通过对位于矿岩移动区域无影响区的放出体形态进行放出体拟合,得出了矿石散体的流动参数为：α=1.3864；β=0.2496；α1=1.132；β1=0.324,当α=1.3864l/ln2,说明放出体是上部较窄,下部较宽,结合实验得到的放出体形态,说明得出的参数和实验得到的放出体形态拟合较好。通过对矿岩稳定性情况和矿石主要损失形式分析入手,为了提高矿石的回收率,通过优化采场结构参数改善矿石的损失贫化情况。通过采场结构参数优化,在采用无底柱分段崩落开采时采场的最佳结构参数为：分段高度(h)为20m；放矿步距为5.2m,崩矿步距(R)为3.5m。本论文采用水平剖面达孔量法和3Dmine软件创新性完成了倾斜边壁条件下的放出体的准确圈定,为该类条件下放矿规律研究和矿山生产提供借鉴参考。
[Abstract]:Due to the influence of the upper and lower side wall in the drawing process of the dipping and steep inclined medium thick orebody in the Jianshan mining area, the residual amount in the lower wall is too large, and the ore loss and dilution are serious, and so on. The sublevel caving method is adopted in the inclined and steeply inclined medium thick ore bodies. The caving loose is affected by the upper and lower side wall during the drawing process, and the release body changes. At present, there is little research on the flow law of the loose body at home and abroad. In order to reduce the loss and dilution of steeply inclined medium thick orebody in Jianshan mining area, combined with the occurrence of orebody and mining technology, the physical similarity simulation is used as the research method in this paper. Using the improved method of reaching hole volume and 3Dmine software to complete the delineation of the releasing body under the condition of inclined edge wall, the shape of the residual body was obtained by experiments. In this paper, the characteristics of the shape of the caving rock, the movement of the ore scattered body and the ore remnant in the footwall are analyzed under the influence of the upper and lower side wall of the caving ore. The main work is as follows: regional geological data, orebody occurrence characteristics, engineering geology and hydrogeological characteristics are collected by consulting data. According to the occurrence characteristics of steeply inclined medium thick ore bodies in Jianshan mining area, two simulation experiments of ore sections were carried out by using similar model tests, and the loss and dilution of ores were measured and analyzed. Through the above work, the following conclusions are obtained: drawing out the shape of the discharge body through the experiment of the tip of the steeply inclined and thick ore body, and fitting the shape of the discharge body in the unaffected area of the moving area of the ore and rock. The flow parameters of the ore pellets are as follows: 伪 = 1.3864; 尾 = 0.2496; 伪 1n = 1.132; 尾 1n = 0.324.When 伪 = 1.3864l / ln2n 2, it shows that the exfoliator is narrower in upper part and wider in lower part. Based on the analysis of the stability of ore and the main loss forms of ore, in order to improve the recovery rate of ore, the loss and dilution of ore are improved by optimizing the structural parameters of stope. Through the optimization of stope structure parameters, the optimum structural parameters of stope with sublevel caving without bottom pillar are as follows: (h) of subsection height is 20m, step distance of drawing is 5.2mand (R) of caving is 3.5m. In this paper, the horizontal profile method and 3Dmine software are used to creatively complete the accurate delineation of the drawing body under the condition of inclined edge wall, which provides a reference for the study of drawing law and mine production under this kind of conditions.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD851

【参考文献】