基于PFC~(3D)对无底柱分段崩落法结构参数优化研究
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摘要
为了减少矿山企业的采矿成本,提高矿山的经济效益,对无底柱分段崩落法的结构参数、多分段放矿等方面进行研究,分析与矿石的回收率和贫化率的关系。探讨以大间距结构参数为理论基础,结合矿山的实际放矿参数,确定正交试验因素,采用室内多分段放矿模型,分别对低贫化放矿和矿山现行截止品位放矿进行了试验,分别分析放矿结构参数与矿石回收率和贫化率的关系。采用计算机PFC~(3D)软件模拟低贫化放矿,将模拟所得数据采用回贫差因素分析方法进行分析,利用ORIGIN软件采用响应面法拟合函数分析回贫差和结构参数的关系,最后分析矿石回贫差与无底柱分段崩落法各结构参数的关系,结果表明提出的该矿山的无底柱分段崩落法结构参数为最优值。
In order to reduce the mining cost of mining enterprises and improve the economic benefits of mines,the structural parameters of sublevel caving method without pillars and multi-stage ore mining were studied,and the relationship between the recovery rate and the depletion rate of ore was analyzed.Based on the theoretical parameters of large-pitch structural parameters,combining with the actual mining parameters of the mine,the orthogonal experimental factors were determined,and the indoor multi-stage ore-concentration model was used to conduct experiments on low-depleted ore-mining and current cut-off grades of mines.The relationship between the ore-construction structure parameters and the ore recovery rate and the depletion rate were analyzed,separately.The computer PFC~(3D) software was used to simulate the low-depleted ore deposit,and the simulated data was analyzed by the method of returning to the poor difference factor.The relationship between the poor return and the structural parameters was analyzed by the ORIGIN software using the response surface method fitting function.Finally,the ore was returned to poverty.The relationship between the difference and the structural parameters of the sublevel caving method without pillars was analyzed,and finally the optimal structural parameters of the sublevel caving method without pillars in the mine were proposed.
In order to reduce the mining cost of mining enterprises and improve the economic benefits of mines,the structural parameters of sublevel caving method without pillars and multi-stage ore mining were studied,and the relationship between the recovery rate and the depletion rate of ore was analyzed.Based on the theoretical parameters of large-pitch structural parameters,combining with the actual mining parameters of the mine,the orthogonal experimental factors were determined,and the indoor multi-stage ore-concentration model was used to conduct experiments on low-depleted ore-mining and current cut-off grades of mines.The relationship between the ore-construction structure parameters and the ore recovery rate and the depletion rate were analyzed,separately.The computer PFC~(3D) software was used to simulate the low-depleted ore deposit,and the simulated data was analyzed by the method of returning to the poor difference factor.The relationship between the poor return and the structural parameters was analyzed by the ORIGIN software using the response surface method fitting function.Finally,the ore was returned to poverty.The relationship between the difference and the structural parameters of the sublevel caving method without pillars was analyzed,and finally the optimal structural parameters of the sublevel caving method without pillars in the mine were proposed.
引文
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[3]张国联,邱景平,宋守志,等.无底柱分段崩落法回收指标与分段数关系研究[J].金属矿山,2004(4):13-19.
[4]张国联,邱景平,宋守志,等.张家洼矿无底柱分段崩落法结构参数灰色决策[J].东北大学学报:自然科学版,2006,27(4):450-460.
[5]陈勃,陈星明,潘锋,等.桦树沟V矿体无底柱分段崩落法开采技术分析[J].有色金属(矿山部分),2018,70(3):24-27.
[6]江兵.大冶铁矿无底柱分段崩落法采场结构参数优化的研究[D].武汉:武汉科技大学,2008.
[7]王明旭,许梦国,程爱平.基于接触带稳定性的回采顺序优化分析[J].中国安全生产科学技术,2017,13(1):77-83.
[8]董振民,范庆霞,金闯,等.大间距集中化无底柱采矿新工艺研究[J].金属矿山,2004(3):1-6.
[9]简永军.大红山铁矿Ⅱ1矿体370m中段采场结构参数优化研究[D].昆明:昆明理工大学,2017.
[10]方传峰,余传玉,史存丁,等.基于FLAC3D模型动态更新的自然崩落法开采过程模拟技术[J].中国安全生产科学技术,2018,14(5):89-94.
[11]吴爱祥,武力聪,刘晓辉,等.无底柱分段崩落法结构参数研究[J].中南大学学报(自然科学版),2012,43(5):1840-1855.
[12]乔登攀.放矿理论研究与应用[D].昆明:云南科技出版社,2006.
[13]李爱兵.边坡稳定性影响因素敏感度的正交极差分析方法[J].勘查科学技术,1995,13(4):25-32.
[14]Itasca Consulting Group Inc.Particle flow code(Version 3.0)[M].Minneapolis:ICG,2004:22-26.
[15]BRADY B H G,BROWN E T.Rock mechanics for undergroundmining[M].London:Allen&Unwin,1985:334-339.
[16]刘志娜,梅林芳,宋卫东,等.基于PFC数值模拟的无底柱采场结构参数优化研究[J].矿业研究与开发,2008,28(1):2-6.