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Gold Science and Technology >

2023 , Vol. 31 >Issue 1: 88 - 101

DOI: https://doi.org/10.11872/j.issn.1005-2518.2023.01.146

Mining Technology and Mine Management

Study on Safety and Efficient Mining Scheme for Low Grade Nickel Ore Under Complex Mining Conditions

  • Baohui TAN , 1 ,
  • Yongding WANG 2 ,
  • Zhigui ZHANG 1 ,
  • Weiguo LONG 2 ,
  • Bin LI 1 ,
  • Jianyuan HE 2 ,
  • Zhen GONG 2
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  • 1. School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
  • 2. Longshou Mine, Jinchuan Group Co. , Ltd. , Jinchang 737100, Gansu, China

Received date: 2022-10-16

  Revised date: 2022-11-22

  Online published: 2023-03-27

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Highlights

In the upper middle section of West No.2 mining area of Longshou mine，it is necessary to adopt the non-pilar sublevel caving method within the range of ore body with a height of less than 70 m to achieve safe，efficient and low loss mining of low grade ore resources，the ore mining conditions are very complex.In view of these key technical problems，the research was carried out one by one.Firstly，a technical scheme for the formation of overburden by inducing caving of large volume cemented backfill was proposed.At the same time，the mechanical properties，structural characteristics and caving ability of cemented backfill were studied，the results show that backfill has good collapsibility.Secondly，the fragmentation degree of cemented backfill was studied by means of field investigation and physical experiment.The results show that although the strength of cemented backfill is small，it will not produce a large amount of powder after the initial caving and secondary crushing during ore drawing，and the average block size of cemented backfill is greater than the average block size of the ore falling from the fan-shaped blasthole.Therefore，the caving cemented backfill will not lead to the premature dilution of the ore.Subsequently，a combined ore drawing scheme was proposed for the only four stoping sections in the caving stope，and the effectiveness of the scheme was studied by physical ore drawing experiments.The experimental results show that the ore recovery rate of the scheme can reach 85.4%，while the dilution rate is only 6.5%.Finally，the above research results were applied to the field production practice，and the roof cementation backfill was successfully induced to fall naturally to form a covering layer with a thickness of about 30 m.While ensuring the ore recovery rate in the stope，the dilution rate is controlled within 10%，so that the stope productivity is increased by 30%，the mining cost is reduced by 28%，and the safe，efficient，low loss，and low-cost mining of low-grade ore in the West No.2 mining area was realized under complex mining conditions.

Cite this article

Baohui TAN , Yongding WANG , Zhigui ZHANG , Weiguo LONG , Bin LI , Jianyuan HE , Zhen GONG . Study on Safety and Efficient Mining Scheme for Low Grade Nickel Ore Under Complex Mining Conditions[J]. Gold Science and Technology, 2023 , 31(1) : 88 -101 . DOI: 10.11872/j.issn.1005-2518.2023.01.146

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我国新发现一种碳酸盐重稀土新矿物

经国际矿物学学会新矿物命名与分类专业委员会（IMA-CNMNC）评审投票，中国地质调查局矿产资源研究所毛景文院士团队申请的新矿物——毓川碳钇矿于近日正式获得批准。新矿物的国际矿物学会编号为IMA2022-120，英文名为yuchuanite-（Y），中文名为毓川碳钇矿，矿物缩写为Ych-（Y）。该新矿物以我国著名矿床地质与矿产勘查学家、中国工程院陈毓川院士的名字命名。

新矿物是由资源所毛景文院士团队的刘鹏副教授（西北大学地质学系）在粤东北玉水铜矿所发现，这也是继2021年发现景文矿后该团队再次在玉水铜矿发现新矿物。初步研究表明，玉水铜矿重稀土矿物形成于晚三叠世（223 Ma），为华南地区首次识别出的三叠纪重稀土矿化。矿物学与Nd同位素研究表明，其形成可能与盆地卤水有关，重稀土来源于下部的红色砂岩。玉水铜矿中多种重稀土新矿物的发现，不仅为拓展重稀土成矿新类型提供了重要启示，也为拓展我国华南重稀土找矿新方向提供了重要支撑。

毓川碳钇矿的获批，离不开西北大学地质学系、大陆动力学国家重点实验室姚薇博士（现西安矿产资源调查中心高级工程师）、杨文强工程师及其合作者中国地质大学（北京）李国武教授团队、中国地质大学（北京）孙宁岳博士、澳大利亚阿德莱德大学Nigel Cook教授、西北大学宋文磊副教授的共同参与。新矿物成分和晶体结构确定过程中得到了南京大学张文兰教授、核工业北京地质研究所李婷高级工程师和王涛博士的帮助。

中国矿业报）

http://www.goldsci.ac.cn/article/2023/1005-2518/1005-2518-2023-31-1-88.shtml

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