【作者】 沈玉众；

【导师】 罗周全；

【作者基本信息】 中南大学 ， 采矿工程， 2011， 硕士

【摘要】 矿柱采场的安全高效回采对提高矿床资源回收率,实现矿山可持续发展具有重要意义,合理的崩矿方式和爆破参数是提高矿柱回采质量的有效途径。本文针对凡口铅锌矿矿柱采场的工程实际,综合运用理论分析、数值模拟、现场探测相结合的方法,采用Surpac、Flac3D及LS-DYNA等软件工具,结合“凡口铅锌矿采场空区三维探测及可视化计算方法研究”科研课题,构建了基于空区实测的矿柱采场三维可视化模型,开展了具有复杂边界矿柱的崩矿方式数值模拟优化研究,优化了矿柱采场回采崩矿方式,实现了矿柱采场回采爆破炮孔三维可视化设计,并对充填体破坏影响最大的边孔进行装药量及装药结构中的不耦合系数进行数值模拟优化,为矿柱安全有效开采提供技术支持。主要研究内容如下：(1)运用CMS空区探测系统实现了对矿柱采场周边矿房采场的三维探测,构建了具有复杂边界矿柱采场的三维可视化模型,从而为矿柱采场三维炮孔设计及矿柱采场崩矿方式优化提供技术支持；(2)运用数值分析技术研究了后退式侧向崩矿和水平上向分层崩矿两种崩矿方式位移场、应力场和塑性区的变化规律,优化了矿柱回采的崩矿方式；(3)运用三维可视化软件Surpac创建了矿柱采场的中深孔爆破设计数据库,实现了矿柱采场回采爆破炮孔的三维可视化设计；(4)运用显示动力分析软件LS-DYNA对炮孔装药量和装药结构进行了数值模拟优化,获得给定边孔距条件下的边孔单段最大安全药量及合理的装药不耦合系数。本文紧密结合工程实践,运用数值计算与可视化建模技术对矿柱采场崩矿方式,矿柱回采爆破炮孔设计以及边孔装药量与装药结构中的不耦合系数等相关技术进行了较为深入的研究,为深部矿柱采场的高效回采奠定了基础,具有较为重要的理论意义和工程应用价值。更多还原

【Abstract】 Safe and efficient pillar mining is important for improving mine resources recovery and achieving sustainable development. Proper pillar caving method and blasting parameters are two effective ways to improve the quality of pillar mining. According to engineering of Fankou lead-zinc mine, the methods including theoretical analysis, numerical simulation and on-site investigation were used comprehensively in this paper. Combined with "3D cavity monitor and the calculation method of visualization in FanKou lead-zinc mine" research project, and by adopting software tools, such as Surpac, Flac3D, LS-DYNA and etc.,3D visual pillar model based on cavity monitor has been built, and the research has been carried out about numerical simulation optimization of mining method of pillar with complex boundary. In the end,3D blast hole design of pillar has been achieved and the charge weight and decouple coefficients of periphery-hole which had the greatest impact on filling were optimized, which provided technical support for safe and effective pillar mining. The main research contents are as follows:(1) 3D visual model with complex boundary is built by using CMS to detect the stope beside pillar, which provides technical support for 3D blast hole design of pillar and pillar mining method.(2) Displacement field, stress field and the variation of plastic zone of the retreating side pillar mining method and the level caving of pillar have been analyzed by using numerical simulation software, thus the pillar mining method was optimized.(3) Deep hole blasting database is created by 3D design software and then 3D visual blast hole design of pillar mining has been achieved.(4) Using Explicit dynamic analysis software LS-DYNA to optimize hole charge weight and charge structure obtained the maximum safe dose and appropriate decouple coefficients.This paper closely combining with the engineering practice, studied pillar mining method,3D blast hole design, the maximum safe dose, decouple coefficients by using numerical simulation and visual modeling, which provides a basis for safe and efficient mining of deep pillar, and it has important theoretical and engineering application value.更多还原