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Effect of a Simulated Coal Mine Environment on Polyurethane Grouting Material and a Proposed Polyurethane Strengthening Method

When it comes to grouting in coal mines, polyurethane (PU) is often utilized. However, it is of vital importance to consistently improve the mineral PU, considering the significant amount of environmental deterioration to which it is prone. Laboratory experiments were used to model various coal mine...

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Autores principales: Hou, Kai, Wang, Shuai, Yao, Xin, Yao, Shun, Zhou, Xinxing, Ma, Jianchao, Wang, Pengfei, Feng, Guorui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10674693/
https://www.ncbi.nlm.nih.gov/pubmed/38006173
http://dx.doi.org/10.3390/polym15224449
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author Hou, Kai
Wang, Shuai
Yao, Xin
Yao, Shun
Zhou, Xinxing
Ma, Jianchao
Wang, Pengfei
Feng, Guorui
author_facet Hou, Kai
Wang, Shuai
Yao, Xin
Yao, Shun
Zhou, Xinxing
Ma, Jianchao
Wang, Pengfei
Feng, Guorui
author_sort Hou, Kai
collection PubMed
description When it comes to grouting in coal mines, polyurethane (PU) is often utilized. However, it is of vital importance to consistently improve the mineral PU, considering the significant amount of environmental deterioration to which it is prone. Laboratory experiments were used to model various coal mine conditions. Additionally, a workable technique for PU strengthening using ultrasonic waves was proposed. Compression tests and scanning electron microscopy (SEM) were used to describe the PU–gangue material’s induration characteristics. The results showed that ultrasound has a positive impact on PU’s mechanical strength. The final strength of the PU was significantly impacted by the size of the coal gangue particles, the amount of dust, and the amount of water. The induration made of gangue and PU with the same mass but differing particle sizes was noticeably different in its compressive strength. The strengthening mechanism showed that the average size of the rigid foam after the ultrasound treatment was smaller, and the ‘honeycomb’-structured space in the inner section was more compact, resulting in the rigid PU foam having a higher compressive strength after ultrasound treatment. Furthermore, the dust content and water content of coal mines need to be controlled within a specific range to ensure the effective use of PU grouting materials.
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spelling pubmed-106746932023-11-17 Effect of a Simulated Coal Mine Environment on Polyurethane Grouting Material and a Proposed Polyurethane Strengthening Method Hou, Kai Wang, Shuai Yao, Xin Yao, Shun Zhou, Xinxing Ma, Jianchao Wang, Pengfei Feng, Guorui Polymers (Basel) Article When it comes to grouting in coal mines, polyurethane (PU) is often utilized. However, it is of vital importance to consistently improve the mineral PU, considering the significant amount of environmental deterioration to which it is prone. Laboratory experiments were used to model various coal mine conditions. Additionally, a workable technique for PU strengthening using ultrasonic waves was proposed. Compression tests and scanning electron microscopy (SEM) were used to describe the PU–gangue material’s induration characteristics. The results showed that ultrasound has a positive impact on PU’s mechanical strength. The final strength of the PU was significantly impacted by the size of the coal gangue particles, the amount of dust, and the amount of water. The induration made of gangue and PU with the same mass but differing particle sizes was noticeably different in its compressive strength. The strengthening mechanism showed that the average size of the rigid foam after the ultrasound treatment was smaller, and the ‘honeycomb’-structured space in the inner section was more compact, resulting in the rigid PU foam having a higher compressive strength after ultrasound treatment. Furthermore, the dust content and water content of coal mines need to be controlled within a specific range to ensure the effective use of PU grouting materials. MDPI 2023-11-17 /pmc/articles/PMC10674693/ /pubmed/38006173 http://dx.doi.org/10.3390/polym15224449 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hou, Kai
Wang, Shuai
Yao, Xin
Yao, Shun
Zhou, Xinxing
Ma, Jianchao
Wang, Pengfei
Feng, Guorui
Effect of a Simulated Coal Mine Environment on Polyurethane Grouting Material and a Proposed Polyurethane Strengthening Method
title Effect of a Simulated Coal Mine Environment on Polyurethane Grouting Material and a Proposed Polyurethane Strengthening Method
title_full Effect of a Simulated Coal Mine Environment on Polyurethane Grouting Material and a Proposed Polyurethane Strengthening Method
title_fullStr Effect of a Simulated Coal Mine Environment on Polyurethane Grouting Material and a Proposed Polyurethane Strengthening Method
title_full_unstemmed Effect of a Simulated Coal Mine Environment on Polyurethane Grouting Material and a Proposed Polyurethane Strengthening Method
title_short Effect of a Simulated Coal Mine Environment on Polyurethane Grouting Material and a Proposed Polyurethane Strengthening Method
title_sort effect of a simulated coal mine environment on polyurethane grouting material and a proposed polyurethane strengthening method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10674693/
https://www.ncbi.nlm.nih.gov/pubmed/38006173
http://dx.doi.org/10.3390/polym15224449
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