放矿椭球体排列理论的合理性探讨及实验研究
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摘要
对基于椭球体排列理论的采场结构参数设计方法存在的缺陷和不足进行了探讨和分析,主要包括该理论是否遵循了放出体和崩落体一致原则、将放出体相切最优原则等价于纯矿石放出体相切最优原则是否合理、认为放出体相交便会造成矿石贫化的说法是否科学,以及高分段结构计算公式的合理性等几个方面.设计并开展了三组不同结构参数的物理放矿实验,实验结果表明,由于放出体与崩落体形态不符,导致大间距结构参数方案的矿石回收效果最差.理论分析和物理实验均表明,基于椭球体排列理论的采场结构参数设计方法存在一定缺陷,有待进一步的改进和完善.
The deficiencies of structural parameter design method based on ellipsoid arrangement theory were discussed and analyzed,involving whether the theory follows the consistence principle between the drawn-out ore body and the blasting ore body or not,whether the equivalence from drawn-out ore body tangent optimum principle to the draw off body of pure ore tangent optimum principle is reasonable,whether the viewpoint that the drawn-out ore body intersection results in ore dilution is scientific or not,and the rationality of the calculation formula of high sublevel structure. Three groups of physical drawing experiments with different structural parameters were designed and carried out. The experimental results showed that the ore recovery rate of large spacing structure parameter scheme is the lowest due to the drawn-out ore body and the blasting ore body seriously inconsistent. Both theoretical analysis and physical experiments showed that the design method of structural parameters of stope based on ellipsoid arrangement theory is unreasonable and needs to be further improved.
The deficiencies of structural parameter design method based on ellipsoid arrangement theory were discussed and analyzed,involving whether the theory follows the consistence principle between the drawn-out ore body and the blasting ore body or not,whether the equivalence from drawn-out ore body tangent optimum principle to the draw off body of pure ore tangent optimum principle is reasonable,whether the viewpoint that the drawn-out ore body intersection results in ore dilution is scientific or not,and the rationality of the calculation formula of high sublevel structure. Three groups of physical drawing experiments with different structural parameters were designed and carried out. The experimental results showed that the ore recovery rate of large spacing structure parameter scheme is the lowest due to the drawn-out ore body and the blasting ore body seriously inconsistent. Both theoretical analysis and physical experiments showed that the design method of structural parameters of stope based on ellipsoid arrangement theory is unreasonable and needs to be further improved.
引文
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[3]黄泽.金山店铁矿无底柱分段崩落法大间距结构试验研究[D].武汉:武汉科技大学,2011.(Huang Ze. Study on large spacing structure with sublevel caving in Jinshandian iron mine[D]. Wuhan:Wuhan University of Science and Technology,2011.)
[4]柳小波.散体流动时空演化仿真模型的研究与应用[D].沈阳:东北大学,2009.(Liu Xiao-bo. Study on simulation model of time-space evolution of granular flow and its applications[D].Shenyang:Northeastern University,2009.)
[5]陈发兴,张志雄.大参数无底柱分段崩落法在大红山铁矿的运用[J].有色金属设计,2009,36(3):18-21.(Chen Fa-xing,Zhang Zhi-xiong. Application of big parameter of sublevel caving in Dahongshan iron mine[J].Nonferrous Metals Design,2009,36(3):18-21.)
[6]董振民,何士海,李永明,等.无底柱分段崩落法采矿理论的重大突破[J].金属矿山,2009(sup1):145-150.(Dong Zhen-min,He Shi-hai,Li Yong-ming,et al. Mining theoretical great breakthrough of sublevel caving method[J]. Metal Mine,2009(sup1):145-150.)
[7]陈诗墨.大结构参数无底柱分段崩落法放矿方式与结构参数研究[D].绵阳:西南科技大学,2016.(Chen Shi-mo. Study on the ore drawing method and structure parameters in the condition of enlarged-structure parameters of sublevel caving[D]. M ianyang:Southw est University of Science and Technology,2016.)
[8] Zhang Z G,Liu X G. Non-dilution draw method and its application in sublevel caving mines in China[C]//Proceedings of the 5th International Conference&Exhibition on M ass M ining. Lule,2008:275-284.
[9] Trueman R,Castro R,Halim A. Study of multiple draw-zone interaction in block caving mines by means of a large 3D physical model[J]. International Journal of Rock Mechanics and Mining Sciences,2008,45(7):1044-1051.
[10]张志贵,刘兴国,于国立.无底柱分段崩落法无贫化放矿:无贫化放矿理论及其在矿山的实践[M].沈阳:东北大学出版社,2007:52-67.(Zhang Zhi-gui,Liu Xing-guo,Yu Guo-li. Non-dilution draw for sublevel caving:non-dilution draw method and its application in mines[M]. Shenyang:Northeastern University Press,2007:52-67.)