淘锡坑钨矿急倾斜矿体采矿方法及采场结构参数优化研究

发布时间：2018-06-16 04:34

本文选题：急倾斜薄矿体 + 层次分析法　；参考：《江西理工大学》2017年硕士论文

【摘要】：淘锡坑钨矿原采用的浅孔留矿法,因回采工艺适用性较差,导致巷道顶板局部出现裂隙、部分出矿漏斗发生损坏等问题,影响了矿山的正常运营。为保证该矿山生产的安全性和高效性,需对采矿方法、采场结构参数进行重新选择。本文利用层次分析法与数值模拟对该问题进行了深入研究,具体内容及成果如下:(1)根据淘锡坑钨矿开采技术条件,初选上向水平分层充填法、分层崩落法及分段凿岩阶段矿房法三种采矿方法,结合层次分析法、模糊数学等方法,建立技术、安全、经济等多因子综合评价体系,最后确定分段凿岩阶段矿房法最适合该矿山;(2)实地钻取矿石、顶底板围岩岩芯,通过室内岩石力学实验获得相关物理力学参数,将其进行适当折减后用于数值模拟分析;(3)在已选采矿方法的基础上,设计9组开采方案,运用ANSYS、FLAC3D软件进行模拟计算,将得到的结果通过价值工程理论进行综合比较分析,确定最佳采场结构参数为矿房跨度48m,间柱宽度6m,顶柱厚度5m,为矿山的安全生产提供依据;(4)建立地压现场监测系统,分析回采过程中采场应力变化规律、巷道变形情况,对采场稳定性进行分析,验证方案可行。
[Abstract]:The shallow hole retention method used in the Tungsten Mine of Taoxikeng has some problems such as crack in the roof of roadway and damage to the funnel of part of the mine due to the poor applicability of the mining technology, which has affected the normal operation of the mine. In order to ensure the safety and efficiency of the mine, the mining method and stope structure parameters should be re-selected. In this paper, the analytic hierarchy process (AHP) and numerical simulation are used to study the problem. The concrete contents and results are as follows: 1) according to the technical conditions of tungsten mining in Taoxikeng Mine, the primary horizontal stratified filling method is selected. Three kinds of mining methods, such as stratified caving method and sublevel rock drilling stage mining method, combined with analytic hierarchy process (AHP) and fuzzy mathematics, are used to establish a comprehensive evaluation system of technology, safety, economy and so on. Finally, it is determined that the chamber method in the stage of sublevel drilling is the most suitable for this mine to drill ore in the field, the core of surrounding rock of roof and floor is obtained, and the relevant physical and mechanical parameters are obtained by indoor rock mechanics experiment. On the basis of the selected mining methods, nine groups of mining schemes are designed and simulated by ANSYS FLAC3D software. The results obtained are compared and analyzed by the theory of value engineering. The optimum structural parameters of stope are as follows: the span of mine house is 48 m, the width of interpillar is 6 m, the thickness of top pillar is 5 m, which provides the basis for safety production of mine, and establishes the field monitoring system of ground pressure, analyzes the variation law of stope stress and the deformation of roadway during the process of mining. The stability of stope is analyzed and the feasibility of the scheme is verified.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD864

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