Ground Fracture Development and Surface Fracture Evolution in N00 Method Shallowly Buried Thick Coal Seam Mining in an Arid Windy and Sandy Area: A Case Study of the Ningtiaota Mine (China)

An observatory was established at the Ningtiaota Mine (China) in order to investigate the surface deformation pattern of N00 method workings mining in shallow buried thick coal seams in a windy-sand area. The observatory allows one to measure the coupling between the periodic changes of parameters r...

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Autores principales:	Yaokun Fu, Jianxuan Shang, Zhenqi Hu, Pengyu Li, Kun Yang, Chao Chen, Jiaxin Guo, Dongzhu Yuan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	windy sandy area N00 method ground deformation ground subsidence ground fissures Technology T
Acceso en línea:	https://doaj.org/article/216c835cdc964d4dac5d91cd8bb058bf
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spelling	oai:doaj.org-article:216c835cdc964d4dac5d91cd8bb058bf2021-11-25T17:28:10ZGround Fracture Development and Surface Fracture Evolution in N00 Method Shallowly Buried Thick Coal Seam Mining in an Arid Windy and Sandy Area: A Case Study of the Ningtiaota Mine (China)10.3390/en142277121996-1073https://doaj.org/article/216c835cdc964d4dac5d91cd8bb058bf2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7712https://doaj.org/toc/1996-1073An observatory was established at the Ningtiaota Mine (China) in order to investigate the surface deformation pattern of N00 method workings mining in shallow buried thick coal seams in a windy-sand area. The observatory allows one to measure the coupling between the periodic changes of parameters related to ground subsidence and ground cracks with workings advancement. The data monitored in the field indicate that when the adjacent mining workings are mined below the ground, a sinkhole basin with a larger impact area will be formed. New ground fractures are formed above the mining area to connect with the fractures above the mining face. As a consequence a new pattern of “O” circle distribution beyond the working face is formed, which develops rapidly during the working face recovery. In addition, the dynamic fractures in coal mining are characterized by the phenomenon of self-healing. Our findings will help to protect the surface environment of the mine area during shallow buried high-intensity mining activities in the Lime Tower coal mine, and are also an important guideline in other windy beach mining areas.Yaokun FuJianxuan ShangZhenqi HuPengyu LiKun YangChao ChenJiaxin GuoDongzhu YuanMDPI AGarticlewindy sandy areaN00 methodground deformationground subsidenceground fissuresTechnologyTENEnergies, Vol 14, Iss 7712, p 7712 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	windy sandy area N00 method ground deformation ground subsidence ground fissures Technology T
spellingShingle	windy sandy area N00 method ground deformation ground subsidence ground fissures Technology T Yaokun Fu Jianxuan Shang Zhenqi Hu Pengyu Li Kun Yang Chao Chen Jiaxin Guo Dongzhu Yuan Ground Fracture Development and Surface Fracture Evolution in N00 Method Shallowly Buried Thick Coal Seam Mining in an Arid Windy and Sandy Area: A Case Study of the Ningtiaota Mine (China)
description	An observatory was established at the Ningtiaota Mine (China) in order to investigate the surface deformation pattern of N00 method workings mining in shallow buried thick coal seams in a windy-sand area. The observatory allows one to measure the coupling between the periodic changes of parameters related to ground subsidence and ground cracks with workings advancement. The data monitored in the field indicate that when the adjacent mining workings are mined below the ground, a sinkhole basin with a larger impact area will be formed. New ground fractures are formed above the mining area to connect with the fractures above the mining face. As a consequence a new pattern of “O” circle distribution beyond the working face is formed, which develops rapidly during the working face recovery. In addition, the dynamic fractures in coal mining are characterized by the phenomenon of self-healing. Our findings will help to protect the surface environment of the mine area during shallow buried high-intensity mining activities in the Lime Tower coal mine, and are also an important guideline in other windy beach mining areas.
format	article
author	Yaokun Fu Jianxuan Shang Zhenqi Hu Pengyu Li Kun Yang Chao Chen Jiaxin Guo Dongzhu Yuan
author_facet	Yaokun Fu Jianxuan Shang Zhenqi Hu Pengyu Li Kun Yang Chao Chen Jiaxin Guo Dongzhu Yuan
author_sort	Yaokun Fu
title	Ground Fracture Development and Surface Fracture Evolution in N00 Method Shallowly Buried Thick Coal Seam Mining in an Arid Windy and Sandy Area: A Case Study of the Ningtiaota Mine (China)
title_short	Ground Fracture Development and Surface Fracture Evolution in N00 Method Shallowly Buried Thick Coal Seam Mining in an Arid Windy and Sandy Area: A Case Study of the Ningtiaota Mine (China)
title_full	Ground Fracture Development and Surface Fracture Evolution in N00 Method Shallowly Buried Thick Coal Seam Mining in an Arid Windy and Sandy Area: A Case Study of the Ningtiaota Mine (China)
title_fullStr	Ground Fracture Development and Surface Fracture Evolution in N00 Method Shallowly Buried Thick Coal Seam Mining in an Arid Windy and Sandy Area: A Case Study of the Ningtiaota Mine (China)
title_full_unstemmed	Ground Fracture Development and Surface Fracture Evolution in N00 Method Shallowly Buried Thick Coal Seam Mining in an Arid Windy and Sandy Area: A Case Study of the Ningtiaota Mine (China)
title_sort	ground fracture development and surface fracture evolution in n00 method shallowly buried thick coal seam mining in an arid windy and sandy area: a case study of the ningtiaota mine (china)
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/216c835cdc964d4dac5d91cd8bb058bf
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Ground Fracture Development and Surface Fracture Evolution in N00 Method Shallowly Buried Thick Coal Seam Mining in an Arid Windy and Sandy Area: A Case Study of the Ningtiaota Mine (China)

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