某铁矿充填管网延深参数优化研究
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摘要
为减少某铁矿充填管道磨损、降低充填作业的堵管风险,达到优化井下管网的目的,通过全尾砂粒度分析、塌落度试验和L管流动性试验,对该铁矿充填料浆的流动性能进行了研究,确定了结构流态料浆浓度、流变参数,计算了结构流状态下料浆自流输送的沿程阻力,并得到了管网延伸的最优布设地点。研究表明:该铁矿全尾砂粒度较细,平均粒径为51.6μm,72%～70%料浆塌落度为28.6～27.3 cm,屈服剪切应力τ0为3.690～1.471 Pa,黏性系数η为0.701～0.450 Pa·s。由试验过程及结果可确定充填料浆浓度为72%～70%时呈现结构流态。在上述分析的基础上,对深部矿体充填管网延深参数进行了优化,当料浆浓度为72%时,沿程输送阻力为1.420～1.893 kPa/m,充填天井布设范围应为631～673 m,此时结构流态料浆的自流输送可有效克服满管率低、管道磨损严重等不足。
In order to reduce the pipe wear of a certain iron ore backfilling pipe,decrease the risk of pipe blockage, eventually achieve to optimize the underground pipe network, the grain size analysis test,caving degree test and L type pipe fluidity test were conducted, to study the flowability of the full tailings backfilling slurry in the iron ore. From the above experiments, the concentration and rheological parameter of structure fluid could be determined. Through the analysis,on-way resistance of gravity transportation slurry in different diameter could be calculated.Then the optimal location of the deepening pipe network is obtained. Result shows that whole tailings particle size is fine,the average particle size is 51.6 μm. When the filling slurry concentration is 72% ～ 70%, the corresponding caving degree is 28.6～27.3 cm, yield shear stress τ0 is 3.690～1.471 Pa,viscosity coefficient is 0.701～0.450 Pa·s. The test process and results can be determined the slurry concentration range of structure fluid state is 72% ～ 70%. Optimization on the deepening parameter of backfilling pipe network for deep level ore body mining, when slurry concentration is 72%,the flow resistance along the path is 1.420～1.893 kPa/m,the placement range of filling patio L should be 631～673 m. Then,the self-flow transport of structural fluid slurry can avoid a series of downsides,suchas the disadvantages of low full-flow ratio and serious pipe wear.
In order to reduce the pipe wear of a certain iron ore backfilling pipe,decrease the risk of pipe blockage, eventually achieve to optimize the underground pipe network, the grain size analysis test,caving degree test and L type pipe fluidity test were conducted, to study the flowability of the full tailings backfilling slurry in the iron ore. From the above experiments, the concentration and rheological parameter of structure fluid could be determined. Through the analysis,on-way resistance of gravity transportation slurry in different diameter could be calculated.Then the optimal location of the deepening pipe network is obtained. Result shows that whole tailings particle size is fine,the average particle size is 51.6 μm. When the filling slurry concentration is 72% ～ 70%, the corresponding caving degree is 28.6～27.3 cm, yield shear stress τ0 is 3.690～1.471 Pa,viscosity coefficient is 0.701～0.450 Pa·s. The test process and results can be determined the slurry concentration range of structure fluid state is 72% ～ 70%. Optimization on the deepening parameter of backfilling pipe network for deep level ore body mining, when slurry concentration is 72%,the flow resistance along the path is 1.420～1.893 kPa/m,the placement range of filling patio L should be 631～673 m. Then,the self-flow transport of structural fluid slurry can avoid a series of downsides,suchas the disadvantages of low full-flow ratio and serious pipe wear.
引文
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[13]毛明发,王炳文,朱家锐,等.充填料浆自流输送管道磨损机理研究[J].金属矿山,2018(4):178-184.Ma Mingfa,Wang Bingwen,Zhu Jiarui,et al.Study on wear mechanism of gravity transportation pipeline for backfilling slurry[J].Metal Mine,2018(4):178-184.
[14]肖云涛,吴爱祥,翟永刚,等.会泽铅锌矿膏体充填钻孔优化研究[J].金属矿山,2011(4):32-35.Xiao Yuntao,Wu Aixiang,Zhai Yonggang,et al.Optimization research on paste backfill drilling system in Huize Lead-zinc Mine[J].Metal Mine,2011(4):32-35.
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[16]李耀武,王新民,赵彬,等.充填钻孔磨损因素分析[J].金属矿山,2008(6):27-30.Li Yaowu,Wang Xinmin,Zhao Bin,et al.Analysis of abrasion factors of drill holes for filling[J].Metal Mine,2008(6):27-30.
[17]姚维信,姚中亮,刘洲基,等.高浓度大流量管输充填技术与工艺[M].北京:科学出版社,2014.Yao Weixin,Yao Zhongliang,Liu Zhouji,et al.High Concentration and Large Flow Pipeline Transportation Filling Technology and Process[M].Beijing:Science Press,2014.
[2]张修香,乔登攀.粗骨料高浓度充填料浆的管道输送模拟及试验[J].中国有色金属学报,2015,25(1):258-266.Zhang Xiuxiang,Qiao Dengpan.Simulation and experiment of pipeline transportation of high density filling slurry with coarse aggregates[J].Transactions of Nonferrous Metals Society of China,2015,25(1):258-266.
[3]吴爱祥,刘晓辉,王洪江,等.结构流充填料浆管道输送阻力特性[J].中南大学学报:自然科学版,2014,45(12):4325-4330.Wu Aixiang,Liu Xiaohui,Wang Hongjiang,et al.Rsistance characteristics of structure fluid backfilling slurry in pipeline transpor[tJ].Journal of Central South University:Science and Technology,2014,45(12):4325-4330
[4]刘晓辉,吴爱祥,王洪江,等.深井矿山充填满管输送理论及应用[J].北京科技大学学报,2013,35(9):1113-1118.Liu Xiaohui,Wu Aixiang,Wang Hongjiang,et al.Full-flow transport theory and its application in deep mine backfilling[J].Journal of University of Science and Technology Beijing,2013,35(9):1113-1118.
[5]吴迪,蔡嗣经,杨威,等.基于CFD的充填管道固液两相流输送模拟及试验[J].中国有色金属学报,2012,22(7):2133-2140.Wu Di,Cai Sijing,Yang Wei,et al.Simulation and experiment of backfilling pipeline transportation of solid-liquid two-phase flow based on CFD[J].The Chinese Journal of Nonferrous Metals,2012,22(7):2133-2140.
[6]吕宪俊,金子桥,胡术刚,等.细粒尾矿充填料浆的流变性及充填能力研究[J].金属矿山,2011(5):32-35.LüXianjun,Jin Ziqiao,Hu Shugang,et al.Study on the rheological property and filling capacity of the filling slurry with fine tailings[J].Metal Mine,2011(5):32-35.
[7]王贤来,郑晶晶,张钦礼,等.充填钻孔内管道磨损的影响因素及保护措施[J].矿冶工程,2009,29(5):9-12.Wang Xianlai,Zheng Jingjing,Zhang Qinli,et al.Influencing factors on the abrasion of pipelines in backfill drilling and protective measures[J].Mining and Metallurgical Engineering,2009(5):9-12.
[8]郑晶晶,张钦礼,王新民,等.充填管道系统失效模式与影响分析(FMEA)及失效影响模糊评估[J].中国安全科学学报,2009,19(6):166-171.Zheng Jingjing,Zhang Qinli,Wang Xinmin,et al.FMEA analysis of back filling pipeline system and fuzzy evaluation of failure effects[J].China Safety Science Journal,2009,19(19):166-171.
[9]方志甫.安庆铜矿井下充填管网优化的研究[J].有色金属:矿山部分,2007(2):5-9.Fang Zhifu.Study on underground backfilling pipe network optimization in Anqing Copper Mine[J].Nonferrous Metals:Mining Section,2007(2):5-9.
[10]张德明,王新民,郑晶晶,等.深井充填钻孔内管道磨损机理及成因分析[J].武汉理工大学学报,2010,32(13):100-105.Zhang Deming,Wang Xinmin,Zheng Jingjing,et al.Wear mechanism and causes of backfilling drill-holes pipelines in deep mine[J].Journal of Wuhan University of Technology,2010,32(13):100-105.
[11]马黎明.黄沙坪深部胶结充填管输系统优化研究[D].长沙:中南大学,2012.Ma Liming.Study and Optimization of Cemented Filling Pipe-conveying System Used for the Deep Deposit in Huangshaping Mine[D].Changsha:Central South University,2012.
[12]姚振巩.深井充填管道输送系统优化研究[J].矿业研究与开发,2008(2):7-9.Yao Zhengong.Optimization on backfill pipeline transport system in deep mine[J].Mining Research and Development,2008(2):7-9.
[13]毛明发,王炳文,朱家锐,等.充填料浆自流输送管道磨损机理研究[J].金属矿山,2018(4):178-184.Ma Mingfa,Wang Bingwen,Zhu Jiarui,et al.Study on wear mechanism of gravity transportation pipeline for backfilling slurry[J].Metal Mine,2018(4):178-184.
[14]肖云涛,吴爱祥,翟永刚,等.会泽铅锌矿膏体充填钻孔优化研究[J].金属矿山,2011(4):32-35.Xiao Yuntao,Wu Aixiang,Zhai Yonggang,et al.Optimization research on paste backfill drilling system in Huize Lead-zinc Mine[J].Metal Mine,2011(4):32-35.
[15]Zhang Q L,Cui J Q,Zheng J J,et al.Wear mechanism and serious wear position of casing pipe in vertical backfill drill-hole[J].Transactions of Nonferrous Metals Society of China,2011,21(11):2503-2507.
[16]李耀武,王新民,赵彬,等.充填钻孔磨损因素分析[J].金属矿山,2008(6):27-30.Li Yaowu,Wang Xinmin,Zhao Bin,et al.Analysis of abrasion factors of drill holes for filling[J].Metal Mine,2008(6):27-30.
[17]姚维信,姚中亮,刘洲基,等.高浓度大流量管输充填技术与工艺[M].北京:科学出版社,2014.Yao Weixin,Yao Zhongliang,Liu Zhouji,et al.High Concentration and Large Flow Pipeline Transportation Filling Technology and Process[M].Beijing:Science Press,2014.