矿井高温巷道喷射隔热混凝土正交试验研究

发布时间：2018-06-24 09:25

本文选题：矿井热害 + 隔热喷射混凝土　；参考：《非金属矿》2017年05期

【摘要】：针对当前深部矿井出现的高温热害问题,提出采用喷射隔热混凝土材料封闭巷道壁面,以从源头上隔绝热源。采用正交试验的方法分析了陶粒、玻化微珠和粉煤灰3种因素对隔热混凝土材料表观密度、导热系数、抗压、抗拉及抗折强度的影响。结果表明,陶粒和玻化微珠能够显著改善材料的隔热能力,同时也会降低其力学性能,粉煤灰在低掺量下能够改善材料的表观密度和隔热能力,但也会造成强度的下降,其总体影响不如前两者。通过功效系数模型分析,得出最优配比。试验配制出的混凝土满足轻质的要求,导热系数约为普通混凝土的1/5~1/7,具有明显的隔热效果,为矿井热害治理提供参考。
[Abstract]:Aiming at the problem of high temperature heat damage in deep mine, a new method is put forward to close the wall of roadway by spraying heat insulation concrete material, so as to isolate the heat source from the source. The effects of ceramsite, vitrified beads and fly ash on the apparent density, thermal conductivity, compressive strength, tensile strength and flexural strength of insulating concrete were analyzed by orthogonal test. The results show that ceramic and vitrified microbeads can significantly improve the thermal insulation ability of the material, but also reduce its mechanical properties. Fly ash can improve the apparent density and thermal insulation ability of the material at low content, but also cause the decrease of the strength. Its overall impact is not as good as the first two. The optimal ratio was obtained through the analysis of the efficiency coefficient model. The concrete prepared by the test meets the requirement of light weight, and the thermal conductivity is about 1 / 5 / 1 / 7 of the ordinary concrete, which has obvious thermal insulation effect and provides a reference for mine thermal damage treatment.
【作者单位】：安徽理工大学土木建筑学院;
【基金】：国家安全生产监督管理总局安全生产重大事故防治关键技术科技项目(anhui-0003-2016AQ) 安徽省高校自然科学重大项目(KJ2015ZD20) 安徽理工大学研究生创新基金项目(2017CX1006)
【分类号】：TD727.2;TU528

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