金山店铁矿主溜井内矿石运移及井壁磨损特征研究

发布时间：2018-12-30 10:55

【摘要】：溜井是地下金属矿山矿石运输的咽喉要道，，而主溜井的稳定是保证矿山高效生产的关键。由于主溜井溜放矿石频繁，井壁受矿石冲击、磨损破坏严重。为保证金属矿山主溜井连续、稳定生产，必须开展主溜井内矿石运移及井壁磨损特征研究。金山店铁矿主溜井溜放矿石任务重，服役时间长，生产中主溜井井壁出现了不同程度的破坏，影响矿山正常生产。针对主溜井井壁受矿石冲击、磨损破坏严重的问题，本研究以现场调研资料为基础，采用理论分析、相似试验和数值模拟等方法研究主溜井矿石运移及井壁磨损特征。（1）以散体运动学理论为基础，计算碰撞过程的恢复系数，得到溜矿段矿石运动速度公式，建立平面坐标系得到了溜矿段矿石运移特征方程。以散体岩石力学为基础，得到贮矿段井壁侧压力理论计算方法和经验公式；以椭球体放矿理论为基础，从定性角度揭示贮矿段矿石移动特性分区及井壁磨损特点。（2）以相似原理为基础，确定了溜矿试验相似比，构建了实验室模拟主溜井溜矿试验平台，采用高速摄像装置采集矿石运移的动态信息，对采集到的图像资料通过Image Pro Plus动态图像分析软件进行分析，获得了溜矿段矿石运移特征方程和井壁破坏位置；确定了贮矿段放矿试验相似比，制作了井壁模型，制定了试验方案，得到了贮矿段矿石移动特性和井壁磨损特征。（3）根据选择的主溜井放矿数值模拟软件，建立了贮矿段放矿数值模型，根据数值模拟结果对贮矿段进行了分区，得到了各分区矿石移动特性和井壁磨损特征。（4）基于现场调研资料，主溜井内矿石运移及井壁磨损特征的理论分析、相似试验和数值模拟等研究结果能够相互验证，且与实际相符。论文研究得到了金山店铁矿主溜井内矿石运移及井壁磨损特征，为矿山主溜井生产管理与结构优化提供参考。
[Abstract]:The slide well is the key point of ore transportation in underground metal mines, and the stability of the main pass well is the key to ensure the efficient production of the mine. Due to the frequent ore sliding in the main pass well, the shaft wall is severely damaged by the impact of the ore. In order to ensure the continuous and stable production of the main slide shaft in metal mine, it is necessary to study the characteristics of ore migration and wall wear in the main pass well. The main slide shaft of Jinshandian Iron Mine has heavy task and long service time, and the main slide shaft wall is damaged to some extent in production, which affects the normal production of the mine. In order to solve the problem that the main shaft wall is impacted by ore and the wear damage is serious, based on the field investigation data, this study studies the characteristics of ore migration and wall wear in the main pass shaft by theoretical analysis, similarity test and numerical simulation. The main results are as follows: (1) based on the theory of bulk kinematics, the recovery coefficient of the collision process is calculated, the velocity formula of ore movement in the ore slide section is obtained, and the characteristic equation of ore migration in the ore slide section is obtained in a plane coordinate system. Based on the theory of granular rock mechanics, the theoretical calculation method and empirical formula of sidewall pressure are obtained, and based on the ellipsoidal drawing theory, the characteristics of ore movement and wall wear are revealed qualitatively. (2) on the basis of similarity principle, the similarity ratio of ore passing test is determined, and a laboratory simulation test platform is constructed, and the dynamic information of ore movement is collected by high speed camera. Through the analysis of the collected image data by Image Pro Plus dynamic image analysis software, the characteristic equation of ore migration and the location of shaft wall failure are obtained. The similarity ratio of ore drawing test in the ore storage section is determined, the shaft lining model is made, the test scheme is established, and the characteristics of ore movement and wall wear in the ore storage section are obtained. (3) based on the selected software of ore drawing numerical simulation of main pass well, the ore drawing numerical model of the ore storage section is established. According to the results of the numerical simulation, the ore movement characteristics and wall wear characteristics of each district are obtained. (4) based on the field investigation data, the theoretical analysis, similarity test and numerical simulation of ore migration and wall wear characteristics in the main pass well can verify each other and accord with the actual situation. In this paper, the characteristics of ore migration and wall wear in the main pass well of Jinshandian Iron Mine are obtained, which provides a reference for the production management and structure optimization of the main pass shaft in Jinshandian Iron Mine.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD521.1

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