Evolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: A case study of Zhujidong Coal Mine, China

To study the active heat insulation roadways of high-temperature mines considering thermal insulation and injection, a high-temperature −965 m return air roadway of Zhujidong Coal Mine (Anhui Province, China) is selected as a prototype. The ANSYS numerical simulation method is used for the sensitivi...

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Autores principales:	Yao Weijing, Lyimo Happiness, Pang Jianyong
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	high-temperature mine thermal insulation spraying and grouting materials temperature field of roadway field measurement numerical simulation sensitivity analysis Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
Acceso en línea:	https://doaj.org/article/3064a255abdd41139d04439413a5529c
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spelling	oai:doaj.org-article:3064a255abdd41139d04439413a5529c2021-12-05T14:10:50ZEvolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: A case study of Zhujidong Coal Mine, China2191-032410.1515/htmp-2021-0023https://doaj.org/article/3064a255abdd41139d04439413a5529c2021-05-01T00:00:00Zhttps://doi.org/10.1515/htmp-2021-0023https://doaj.org/toc/2191-0324To study the active heat insulation roadways of high-temperature mines considering thermal insulation and injection, a high-temperature −965 m return air roadway of Zhujidong Coal Mine (Anhui Province, China) is selected as a prototype. The ANSYS numerical simulation method is used for the sensitivity analysis of heat insulation grouting layers with different thermal conductivities and zone ranges and heat insulation spray layers with different thermal conductivities and thicknesses; thus, their effects on the heat-adjusting zone radius, surrounding rock temperature field, and wall temperature are studied. The results show that the tunneling head temperature of the Zhujidong Mine is >27°C all year round, consequently causing serious heat damage. The heat insulation circle formed by thermal insulation spraying and grouting can effectively alleviate the disturbance of roadway airflow to the surrounding rock temperature field, thereby significantly reducing the heat-adjusting zone radius and wall temperature. The decrease in the thermal conductivities of the grouting and spray layers, expansion of the grouting layer zone, and increase in the spray layer thickness help effectively reduce the heat-adjusting zone radius and wall temperature. This trend decreases significantly with the ventilation time. A sensitivity analysis shows that the use of spraying and grouting materials of low thermal conductivity for thermal insulation is a primary factor in determining the temperature field distribution, while the range of the grouting layer zone and the spray layer thickness are secondary factors. The influence of the increased surrounding rock radial depth and ventilation time is negligible. Thus, the application of thermal insulation spraying and grouting is essential for the thermal environment control of mine roadways. Furthermore, the research and development of new spraying and grouting materials with good thermal insulation capabilities should be considered.Yao WeijingLyimo HappinessPang JianyongDe Gruyterarticlehigh-temperature minethermal insulation spraying and grouting materialstemperature field of roadwayfield measurementnumerical simulationsensitivity analysisTechnologyTChemical technologyTP1-1185Chemicals: Manufacture, use, etc.TP200-248ENHigh Temperature Materials and Processes, Vol 40, Iss 1, Pp 151-170 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-temperature mine thermal insulation spraying and grouting materials temperature field of roadway field measurement numerical simulation sensitivity analysis Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
spellingShingle	high-temperature mine thermal insulation spraying and grouting materials temperature field of roadway field measurement numerical simulation sensitivity analysis Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248 Yao Weijing Lyimo Happiness Pang Jianyong Evolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: A case study of Zhujidong Coal Mine, China
description	To study the active heat insulation roadways of high-temperature mines considering thermal insulation and injection, a high-temperature −965 m return air roadway of Zhujidong Coal Mine (Anhui Province, China) is selected as a prototype. The ANSYS numerical simulation method is used for the sensitivity analysis of heat insulation grouting layers with different thermal conductivities and zone ranges and heat insulation spray layers with different thermal conductivities and thicknesses; thus, their effects on the heat-adjusting zone radius, surrounding rock temperature field, and wall temperature are studied. The results show that the tunneling head temperature of the Zhujidong Mine is >27°C all year round, consequently causing serious heat damage. The heat insulation circle formed by thermal insulation spraying and grouting can effectively alleviate the disturbance of roadway airflow to the surrounding rock temperature field, thereby significantly reducing the heat-adjusting zone radius and wall temperature. The decrease in the thermal conductivities of the grouting and spray layers, expansion of the grouting layer zone, and increase in the spray layer thickness help effectively reduce the heat-adjusting zone radius and wall temperature. This trend decreases significantly with the ventilation time. A sensitivity analysis shows that the use of spraying and grouting materials of low thermal conductivity for thermal insulation is a primary factor in determining the temperature field distribution, while the range of the grouting layer zone and the spray layer thickness are secondary factors. The influence of the increased surrounding rock radial depth and ventilation time is negligible. Thus, the application of thermal insulation spraying and grouting is essential for the thermal environment control of mine roadways. Furthermore, the research and development of new spraying and grouting materials with good thermal insulation capabilities should be considered.
format	article
author	Yao Weijing Lyimo Happiness Pang Jianyong
author_facet	Yao Weijing Lyimo Happiness Pang Jianyong
author_sort	Yao Weijing
title	Evolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: A case study of Zhujidong Coal Mine, China
title_short	Evolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: A case study of Zhujidong Coal Mine, China
title_full	Evolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: A case study of Zhujidong Coal Mine, China
title_fullStr	Evolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: A case study of Zhujidong Coal Mine, China
title_full_unstemmed	Evolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: A case study of Zhujidong Coal Mine, China
title_sort	evolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: a case study of zhujidong coal mine, china
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/3064a255abdd41139d04439413a5529c
work_keys_str_mv	AT yaoweijing evolutionregularityoftemperaturefieldofactiveheatinsulationroadwayconsideringthermalinsulationsprayingandgroutingacasestudyofzhujidongcoalminechina AT lyimohappiness evolutionregularityoftemperaturefieldofactiveheatinsulationroadwayconsideringthermalinsulationsprayingandgroutingacasestudyofzhujidongcoalminechina AT pangjianyong evolutionregularityoftemperaturefieldofactiveheatinsulationroadwayconsideringthermalinsulationsprayingandgroutingacasestudyofzhujidongcoalminechina
_version_	1718371663328837632

Evolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: A case study of Zhujidong Coal Mine, China

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