Study on the performance of glazed hollow bead insulation mortar for high temperature mine roadway
As the mining operations progress into the stages of deep excavation, heat dissipation from the high temperature surrounding rock makes the problem of heat damage more and more serious. The application of insulation mortar effectively restricts the heat transfer between high temperature rock and air...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X2500499X |
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| author | Yueping Qin Qiang Liu Mingyan Guo Fei Tang Hairong Wang |
| author_facet | Yueping Qin Qiang Liu Mingyan Guo Fei Tang Hairong Wang |
| author_sort | Yueping Qin |
| collection | DOAJ |
| description | As the mining operations progress into the stages of deep excavation, heat dissipation from the high temperature surrounding rock makes the problem of heat damage more and more serious. The application of insulation mortar effectively restricts the heat transfer between high temperature rock and airflow, which is of significant importance for ensuring safe production of deep mines. In this paper, the effects of aggregate gradation, aggregate-to-cement ratio (a/c) and water-to-cement ratio (w/c) on the performance of glazed hollow bead (GHB) insulation mortar were studied by designing an orthogonal experiment. Based on the experimental results and the analysis of efficiency coefficient, the mix ratio of the thermal insulation mortar with the best comprehensive performance was obtained. Finally, a model for predicting airflow temperature in actively insulated mine roadways was established, and the application effectiveness of insulation mortar under various work circumstances was investigated. The findings indicate that the thermal conductivity (λ) of the mortar specimen with the best comprehensive performance is 0.2172 W/(m·K), and the relative content of GHB composite aggregate in the mortar is about 22 %. The outlet airflow temperature of a 1000 m roadway can be reduced by 6.25 °C at the optimum thickness of 0.2 m. |
| format | Article |
| id | doaj-art-a5459a92ded343a7b8e1c7762a577d03 |
| institution | OA Journals |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-a5459a92ded343a7b8e1c7762a577d032025-08-20T02:04:37ZengElsevierCase Studies in Thermal Engineering2214-157X2025-07-017110623910.1016/j.csite.2025.106239Study on the performance of glazed hollow bead insulation mortar for high temperature mine roadwayYueping Qin0Qiang Liu1Mingyan Guo2Fei Tang3Hairong Wang4School of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, 100083, PR China; Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining & Technology, Beijing, 100083, PR ChinaSchool of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, 100083, PR China; Corresponding author.School of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, 100083, PR ChinaSchool of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, 100083, PR ChinaSchool of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, 100083, PR ChinaAs the mining operations progress into the stages of deep excavation, heat dissipation from the high temperature surrounding rock makes the problem of heat damage more and more serious. The application of insulation mortar effectively restricts the heat transfer between high temperature rock and airflow, which is of significant importance for ensuring safe production of deep mines. In this paper, the effects of aggregate gradation, aggregate-to-cement ratio (a/c) and water-to-cement ratio (w/c) on the performance of glazed hollow bead (GHB) insulation mortar were studied by designing an orthogonal experiment. Based on the experimental results and the analysis of efficiency coefficient, the mix ratio of the thermal insulation mortar with the best comprehensive performance was obtained. Finally, a model for predicting airflow temperature in actively insulated mine roadways was established, and the application effectiveness of insulation mortar under various work circumstances was investigated. The findings indicate that the thermal conductivity (λ) of the mortar specimen with the best comprehensive performance is 0.2172 W/(m·K), and the relative content of GHB composite aggregate in the mortar is about 22 %. The outlet airflow temperature of a 1000 m roadway can be reduced by 6.25 °C at the optimum thickness of 0.2 m.http://www.sciencedirect.com/science/article/pii/S2214157X2500499XHeat damageAggregate gradationThermal insulation mortarOrthogonal experimentNumerical simulation |
| spellingShingle | Yueping Qin Qiang Liu Mingyan Guo Fei Tang Hairong Wang Study on the performance of glazed hollow bead insulation mortar for high temperature mine roadway Case Studies in Thermal Engineering Heat damage Aggregate gradation Thermal insulation mortar Orthogonal experiment Numerical simulation |
| title | Study on the performance of glazed hollow bead insulation mortar for high temperature mine roadway |
| title_full | Study on the performance of glazed hollow bead insulation mortar for high temperature mine roadway |
| title_fullStr | Study on the performance of glazed hollow bead insulation mortar for high temperature mine roadway |
| title_full_unstemmed | Study on the performance of glazed hollow bead insulation mortar for high temperature mine roadway |
| title_short | Study on the performance of glazed hollow bead insulation mortar for high temperature mine roadway |
| title_sort | study on the performance of glazed hollow bead insulation mortar for high temperature mine roadway |
| topic | Heat damage Aggregate gradation Thermal insulation mortar Orthogonal experiment Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X2500499X |
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