邓红卫,田小慧.深部开采围岩隔热材料性能试验研究[J].有色金属工程,2018,8(6):.
深部开采围岩隔热材料性能试验研究
Performances of Thermal Insulation Material for Wall Rocks in Deep Mine
投稿时间:2017-11-04  修订日期:2018-01-04
DOI:
中文关键词:  围岩隔热材料  抗压强度  导热系数  SEM  NMR T2谱
英文关键词:wall rocks thermal insulation material  compressive strength  heat conductivity  SEM  NMR T2 spectrum
基金项目:国家自然科学基金项目(51474252);中南大学研究生创新基金项目(105332017120)
     
作者单位
邓红卫 中南大学
田小慧 中南大学
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中文摘要:
      为避免深部开采面临的热害问题,设计研发成本低廉、绿色环保的围岩隔热材料,改善井下高温高湿环境,推动深部开采高温控制技术发展。践行固废资源化理念,本课题以广西高峰矿尾矿为主材料,设计正交试验探究尾矿、水泥、发泡剂、玻化微珠掺量对围岩隔热材料力学性能、隔热性能的影响。运用SEM和NMR技术探究围岩隔热材料的孔隙率、孔径分布与其力学性能及隔热性能的内在联系。结果表明,正交试验的最佳配比为A2B1C2D3,即尾矿:铝粉:水泥质量比为60:1:18,玻化微珠体积比为5%。材料中存在4种不同孔径的孔隙,总孔隙率达12.9%,导热系数达0.273W/(K.m),抗压强度达0.80Mpa,基本满足深部开采围岩隔热的需求。
英文摘要:
      To prevent heat damage in deep mine, this project prepared a thermal insulation material for wall rocks that is cheap, green and efficient to improve hot and wet environment, which can promote the development of temperature-controlling technology. Based on the concept of solid waste recycling, this project chose tailings as the main material and carried out orthogonal experiment. Differences of mechanical properties and heat-shielding performance were analyzed, which were caused by the dosage of tailings, cement, vesicant and glass bead. Using SEM and NMR technology, internal relationship between porosity, pore distribution and mechanical properties, thermal insulation properties of the thermal insulation material were also analyzed. The results show that the optimum mass ratio of orthogonal experiment was that tailings: aluminium powder: cement was 60:1:18. The volume ratio of glass bead was 5%. There were 4 kinds of pores in the material. Total porosity was 12.9%. Heat conductivity coefficient of the material was 0.273W/(K.m). Compressive strength of it was 0.80Mpa.The prepared material can mostly meet the heat-shielding need in deep mine.
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