获各琦铜矿巷道支护及采场结构参数优化研究
发布时间：2018-11-04 16:54
【摘要】：获各琦铜矿初期露天开采采剥严重失调,现转为地下开采,经多年大规模连续开采,浅部可供开采资源日益减少,向深部进行开采是必然趋势。因此,如何合理控制地压将是矿山要解决的首要问题,本文在分析获各琦铜矿区三维地应力场的变化及分布规律基础上,对巷道支护参数和采场结构参数进行优化研究,为获各琦铜矿区安全高效采矿和进一步扩大生产能力提供理论参考。主要研究内容和结论如下:(1)对获各琦铜矿所在区域的地质构造进行收集研究,分析矿体赋存的地质条件;针对矿区主要矿岩,进行岩石单轴和三轴抗压强度试验、抗拉强度试验和点荷载试验,基于回归分析和岩体分类获得岩体力学指标。(2)在矿区选取三个中段布置的5个测点,通过现场套孔应力解除法测量,并应用专用岩体应力计算程序LUT—str计算出5个测点的六个应力分量值,研究矿区水平应力分布规律以及地应力与深度的变化关系特征。(3)采用塑性区范围作为综合评价巷道围岩稳定性的指标,采用理论分析和数值模拟计算方法研究巷道稳定性,并根据组合梁理论优化巷道支护参数。(4)根据极限分析求解采场顶板安全厚度,应用强度折减法、数值分析法和神经网络-遗传算法(ANN-GA),优化采场结构参数,得到采场参数最优组合为控顶高度7.4m,矿房跨度11.8m,矿柱宽6.4m。
[Abstract]:At the initial stage of open-pit mining in Qizhi Copper Mine, the serious imbalance of mining and stripping is now turned into underground mining. After years of large-scale continuous mining, the shallow mining resources are decreasing day by day, and it is an inevitable trend to mine into the deep. Therefore, how to reasonably control the ground pressure will be the most important problem to be solved in the mine. Based on the analysis of the variation and distribution of the three-dimensional geostress field in the Qi-copper mine area, this paper studies the optimization of the roadway support parameters and stope structure parameters. It provides a theoretical reference for obtaining safe and efficient mining and further expanding production capacity in each Qi-copper mine area. The main contents and conclusions are as follows: (1) to collect and study the geological structure of the area where each copper deposit is located and to analyze the geological conditions of the orebody; The uniaxial and triaxial compressive strength tests, tensile strength tests and point load tests are carried out for the main ore rocks in the mining area. Based on regression analysis and rock mass classification, the rock mechanics indexes are obtained. (2) five measuring points are selected in three middle sections of mining area, and the stress relief method is used to measure them. The six stress components of five measuring points are calculated by the special rock mass stress calculation program LUT-str. The distribution law of horizontal stress in mining area and the relationship between in-situ stress and depth are studied. (3) the range of plastic zone is used as the index to evaluate the stability of roadway surrounding rock. The stability of roadway is studied by theoretical analysis and numerical simulation, and the supporting parameters of roadway are optimized according to the theory of composite beam. (4) the safe thickness of roof of stope is solved according to limit analysis, and the strength reduction method is applied. Numerical analysis method and neural network-genetic algorithm (ANN-GA) are used to optimize the stope structure parameters. The optimum combination of stope parameters is as follows: the height of controlled roof is 7.4 m, the span of mine house is 11.8 m, and the width of pillar is 6.4 m.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353;TD862.1
本文编号：2310520
[Abstract]:At the initial stage of open-pit mining in Qizhi Copper Mine, the serious imbalance of mining and stripping is now turned into underground mining. After years of large-scale continuous mining, the shallow mining resources are decreasing day by day, and it is an inevitable trend to mine into the deep. Therefore, how to reasonably control the ground pressure will be the most important problem to be solved in the mine. Based on the analysis of the variation and distribution of the three-dimensional geostress field in the Qi-copper mine area, this paper studies the optimization of the roadway support parameters and stope structure parameters. It provides a theoretical reference for obtaining safe and efficient mining and further expanding production capacity in each Qi-copper mine area. The main contents and conclusions are as follows: (1) to collect and study the geological structure of the area where each copper deposit is located and to analyze the geological conditions of the orebody; The uniaxial and triaxial compressive strength tests, tensile strength tests and point load tests are carried out for the main ore rocks in the mining area. Based on regression analysis and rock mass classification, the rock mechanics indexes are obtained. (2) five measuring points are selected in three middle sections of mining area, and the stress relief method is used to measure them. The six stress components of five measuring points are calculated by the special rock mass stress calculation program LUT-str. The distribution law of horizontal stress in mining area and the relationship between in-situ stress and depth are studied. (3) the range of plastic zone is used as the index to evaluate the stability of roadway surrounding rock. The stability of roadway is studied by theoretical analysis and numerical simulation, and the supporting parameters of roadway are optimized according to the theory of composite beam. (4) the safe thickness of roof of stope is solved according to limit analysis, and the strength reduction method is applied. Numerical analysis method and neural network-genetic algorithm (ANN-GA) are used to optimize the stope structure parameters. The optimum combination of stope parameters is as follows: the height of controlled roof is 7.4 m, the span of mine house is 11.8 m, and the width of pillar is 6.4 m.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353;TD862.1
【参考文献】
相关期刊论文 前10条
1 吴昕;;深井高应力巷道支护参数优化研究[J];煤炭科学技术;2014年07期
2 赵小平;白本祥;高创州;吕军;邓柯;;金川矿区深部巷道喷锚网支护参数研究[J];金属矿山;2014年04期
3 曹协;张军;张建华;;回采巷道矿压显现规律及支护参数优化[J];煤炭科学技术;2014年S1期
4 李学彬;薛华俊;杨仁树;王茂源;李涛涛;何天宇;;深井破碎软岩巷道支护参数设计研究[J];中国矿业;2013年12期
5 解东亮;;地应力测量方法综述[J];科技资讯;2013年06期
6 郑海建;李正刚;;深部矿井巷道支护参数优化可行性分析[J];山东煤炭科技;2012年04期
7 沈子杰;黄志安;李刚强;;地应力测量在夜长坪钼矿区的应用研究[J];黄金;2011年04期
8 魏延诚;汪仁和;张杰;;基于MATLAB神经网络在巷道支护参数设计中的应用[J];煤炭工程;2010年12期
9 叶海旺;常剑;周磊;;基于FLAC~(3D)的采场结构参数优化[J];金属矿山;2010年12期
10 刘钦;刘志祥;刘爱华;李威;;金矿采场结构参数混沌优化[J];采矿与安全工程学报;2010年04期
，本文编号：2310520
本文链接：https://www.wllwen.com/kejilunwen/kuangye/2310520.html
