Subsidence prediction of overburden strata and ground surface in shallow coal seam mining

Abstract Shallow coal seam with thick soil layer is widely reserved in the Jurassic Coalfield, Western China, mining-induced subsidence represents complex characteristics. Combining with physical simulation, theoretical analysis and in-situ observation, the overburden strata structure in dip directi...

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Autores principales:	Jian Cao, Qingxiang Huang, Lingfei Guo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/031be0b8c31142dea378530b93169931
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spelling	oai:doaj.org-article:031be0b8c31142dea378530b931699312021-12-02T17:26:55ZSubsidence prediction of overburden strata and ground surface in shallow coal seam mining10.1038/s41598-021-98520-92045-2322https://doaj.org/article/031be0b8c31142dea378530b931699312021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98520-9https://doaj.org/toc/2045-2322Abstract Shallow coal seam with thick soil layer is widely reserved in the Jurassic Coalfield, Western China, mining-induced subsidence represents complex characteristics. Combining with physical simulation, theoretical analysis and in-situ observation, the overburden strata structure in dip direction were revealed, and the subsidence prediction models were established, based on this, the subsidence equations of overburden strata and ground surface were proposed. The results show that after shallow coal seam mining, based on the subsidence and movement characteristics, the overburden strata structure can be divided into three zones, which are "boundary pillar F-shape zone" (BPZ), "trapezoid goaf zone" (TGZ) and "coal pillar inverted trapezoidal zone" (CPZ). The subsidence of overburden strata depends on the key stratum, while the subsidence of soil layer depends on the bedrock subsidence basin, which is between the bedrock and thick soil layer. The bedrock subsidence is mainly related to mining height and bulking coefficient in TGZ, while it is mainly affected by mining height and distribution load on the key stratum in BPZ and CPZ. According to physical simulation and theoretical model, the maximum surface subsidence of No.1-2 seam mining in Ningtiaota coal mine are 1.1 m and 1.07 m respectively, which is basically consistence with the result of in-situ observation (1.2 m).Jian CaoQingxiang HuangLingfei GuoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jian Cao Qingxiang Huang Lingfei Guo Subsidence prediction of overburden strata and ground surface in shallow coal seam mining
description	Abstract Shallow coal seam with thick soil layer is widely reserved in the Jurassic Coalfield, Western China, mining-induced subsidence represents complex characteristics. Combining with physical simulation, theoretical analysis and in-situ observation, the overburden strata structure in dip direction were revealed, and the subsidence prediction models were established, based on this, the subsidence equations of overburden strata and ground surface were proposed. The results show that after shallow coal seam mining, based on the subsidence and movement characteristics, the overburden strata structure can be divided into three zones, which are "boundary pillar F-shape zone" (BPZ), "trapezoid goaf zone" (TGZ) and "coal pillar inverted trapezoidal zone" (CPZ). The subsidence of overburden strata depends on the key stratum, while the subsidence of soil layer depends on the bedrock subsidence basin, which is between the bedrock and thick soil layer. The bedrock subsidence is mainly related to mining height and bulking coefficient in TGZ, while it is mainly affected by mining height and distribution load on the key stratum in BPZ and CPZ. According to physical simulation and theoretical model, the maximum surface subsidence of No.1-2 seam mining in Ningtiaota coal mine are 1.1 m and 1.07 m respectively, which is basically consistence with the result of in-situ observation (1.2 m).
format	article
author	Jian Cao Qingxiang Huang Lingfei Guo
author_facet	Jian Cao Qingxiang Huang Lingfei Guo
author_sort	Jian Cao
title	Subsidence prediction of overburden strata and ground surface in shallow coal seam mining
title_short	Subsidence prediction of overburden strata and ground surface in shallow coal seam mining
title_full	Subsidence prediction of overburden strata and ground surface in shallow coal seam mining
title_fullStr	Subsidence prediction of overburden strata and ground surface in shallow coal seam mining
title_full_unstemmed	Subsidence prediction of overburden strata and ground surface in shallow coal seam mining
title_sort	subsidence prediction of overburden strata and ground surface in shallow coal seam mining
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/031be0b8c31142dea378530b93169931
work_keys_str_mv	AT jiancao subsidencepredictionofoverburdenstrataandgroundsurfaceinshallowcoalseammining AT qingxianghuang subsidencepredictionofoverburdenstrataandgroundsurfaceinshallowcoalseammining AT lingfeiguo subsidencepredictionofoverburdenstrataandgroundsurfaceinshallowcoalseammining
_version_	1718380771588177920

Subsidence prediction of overburden strata and ground surface in shallow coal seam mining

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