金山店铁矿崩落法转充填法采场隔离矿柱稳定性研究

发布时间：2018-07-02 07:46

  本文选题：崩落法转充填采矿法 + 隔离矿柱稳定性　； 参考：《贵州大学》2016年硕士论文

【摘要】：充填采矿法取代崩落采矿法有利于矿区环境保护以及减少尾矿库库容告急带来的问题。为保证崩落法顺利向充填法转型,在崩落法和充填法过渡段之间设置隔离矿柱,并确定隔离矿柱最优安全厚度以确保过渡段采区的稳定性,是实现安全转型的关键。所以,开展崩落法转充填法采场隔离矿柱稳定性研究具有重要的实际意义。本文以大冶市金山店铁矿张福山矿区西区为工程背景,采用物理试验、理论分析、工程类比和数值模拟分析方法等多种手段对崩落法转充填法采场隔离矿柱稳定性进行了研究。主要研究内容如下:(1)首先通过现场调研收集资料分析了矿山开采现状与采区矿岩的特性;结合力学试验确定矿岩力学参数;结合采场开采实际,确定了影响隔离矿柱稳定性的主要因素为隔离矿柱厚度H、采空区跨度B、隔离矿柱下方支撑间柱宽度W和充填体特性。(2)采用理论分析法确定了与隔离矿柱稳定性相关的参数。综合分析表明,与隔离矿柱稳定性相关的采场合理参数理论值为:采空区跨度8~12m,隔离矿柱厚10~16m。(3)在理论分析基础上,基于FLAC3D数值模拟软件,建立了过渡段在隔离矿柱下方矿体回采和采空区充填两个过程的三维数值模型,分析了研究区域位移、应力、塑性区的变化规律。通过理论分析和数值模拟,最后得到了影响隔离矿柱稳定性的最小安全厚度为14m,采空区跨度为8m,支撑间柱宽度为10m。通过金山店铁矿崩落法转充填法采场隔离矿柱稳定性研究,确定了隔离矿柱合理设计参数,为矿山生产提供了重要的技术支撑。
[Abstract]:Replacing caving mining with filling mining method is beneficial to the environmental protection of mining area and reducing the problems caused by tailing reservoir capacity. In order to ensure the smooth transition of caving method to filling method, it is the key to realize the safe transition by setting isolating pillar between caving method and filling method transitional section, and determining the optimum safe thickness of isolated pillar to ensure the stability of mining area in transition section. Therefore, it is of great practical significance to study the stability of stope isolation pillar with caving method and filling method. Based on the west of Zhang Fushan mining area of Jinshandian Iron Mine in Daye City, this paper studies the stability of stope isolation pillar by means of physical test, theoretical analysis, engineering analogy and numerical simulation analysis. The main research contents are as follows: (1) firstly, through the field investigation and data collection, the paper analyzes the present mining situation and the characteristics of the ore rock in the mining area, determines the mechanical parameters of the ore and rock in combination with the mechanical test, and combines with the mining practice in the stope. The main factors affecting the stability of the isolated pillar are the thickness of the isolated pillar H, the span of the goaf B, the width of the supporting column under the isolated pillar W and the characteristics of the backfill. (2) the parameters related to the stability of the isolated pillar are determined by theoretical analysis. The comprehensive analysis shows that the theoretical values of the reasonable stope parameters related to the stability of the isolated pillar are: the span of the goaf is 812m, the thickness of the isolated pillar is 1010m. (3) on the basis of the theoretical analysis, the numerical simulation software FLAC3D is used. A three dimensional numerical model of the two processes of stoping and goaf filling under the separation pillar in the transition section is established, and the variation law of the displacement, stress and plastic zone in the studied area is analyzed. Through theoretical analysis and numerical simulation, the minimum safe thickness of the isolated pillar is 14 m, the span of the goaf is 8 m, and the width of the bracing column is 10 m. By studying the stability of the isolated pillar in the stope by the caving method and filling method in Jinshandian Iron Mine, the reasonable design parameters of the isolated pillar are determined, which provides an important technical support for the mine production.
【学位授予单位】：贵州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD853.34
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本文编号：2089418