The Failure Mechanism and Stability of the End Slope of Inclined Composite Coal Seam

In view of the inclined occurrence of coal seam in Heishan open-pit coal mine, in the longitudinal exploitation process of the first mining area, the height of the slope at the west end is increasing, and the occurrence of weak interlayer in the slope is in production. The failure mechanism and stab...

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Autores principales:	Haoran Li, Han Du, Runcai Bai, Guangwei Liu, Mingyuan Zhao, Rongzheng Liu
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040 Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/783ab9862cea4ca897e4028cc03c405e
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spelling	oai:doaj.org-article:783ab9862cea4ca897e4028cc03c405e2021-11-08T02:35:26ZThe Failure Mechanism and Stability of the End Slope of Inclined Composite Coal Seam1563-514710.1155/2021/2830717https://doaj.org/article/783ab9862cea4ca897e4028cc03c405e2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/2830717https://doaj.org/toc/1563-5147In view of the inclined occurrence of coal seam in Heishan open-pit coal mine, in the longitudinal exploitation process of the first mining area, the height of the slope at the west end is increasing, and the occurrence of weak interlayer in the slope is in production. The failure mechanism and stability of the end slope of the inclined composite coal seam, which is typical of the West end slope of Heishan open-pit mine, are studied by means of field investigation, theoretical analysis, limit equilibrium analysis, and numerical simulation. The factors affecting the stability of the western side slope and the potential landslide mode are analyzed. The residual thrust method and simplified Bishop method were used to study the stability of two potential landslide modes on the western slope, and the landslide mode, final slope angle, and slope morphology were determined. FLAC3D was used to simulate the western end of the slope, reveal its landslide mechanism, and clarify the evolution law of the slope rock mass displacement. The results show that the landslide mode at the west end of the first mining area is the combined sliding mode of “cutting and bedding.” With the decrease of longitudinal mining depth, the final slope angle functions from 40° to 37°. The stress and strain are concentrated at the weak layer of the coal floor of the western side slope 13-2 and at the foot of the slope. Meanwhile, the failure also occurs inside the slope. The internal cracks connect through the weak layer of the coal floor and slide along the weak layer of the coal floor 13-2. The displacement evolution law of the slope monitoring point shows that the deformation of the slope is mainly horizontal displacement, the maximum displacement deformation is at the foot of the slope, and the degree of displacement deformation of the slope surface is obviously greater than that of the inside of the slope.Haoran LiHan DuRuncai BaiGuangwei LiuMingyuan ZhaoRongzheng LiuHindawi LimitedarticleEngineering (General). Civil engineering (General)TA1-2040MathematicsQA1-939ENMathematical Problems in Engineering, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Engineering (General). Civil engineering (General) TA1-2040 Mathematics QA1-939
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Mathematics QA1-939 Haoran Li Han Du Runcai Bai Guangwei Liu Mingyuan Zhao Rongzheng Liu The Failure Mechanism and Stability of the End Slope of Inclined Composite Coal Seam
description	In view of the inclined occurrence of coal seam in Heishan open-pit coal mine, in the longitudinal exploitation process of the first mining area, the height of the slope at the west end is increasing, and the occurrence of weak interlayer in the slope is in production. The failure mechanism and stability of the end slope of the inclined composite coal seam, which is typical of the West end slope of Heishan open-pit mine, are studied by means of field investigation, theoretical analysis, limit equilibrium analysis, and numerical simulation. The factors affecting the stability of the western side slope and the potential landslide mode are analyzed. The residual thrust method and simplified Bishop method were used to study the stability of two potential landslide modes on the western slope, and the landslide mode, final slope angle, and slope morphology were determined. FLAC3D was used to simulate the western end of the slope, reveal its landslide mechanism, and clarify the evolution law of the slope rock mass displacement. The results show that the landslide mode at the west end of the first mining area is the combined sliding mode of “cutting and bedding.” With the decrease of longitudinal mining depth, the final slope angle functions from 40° to 37°. The stress and strain are concentrated at the weak layer of the coal floor of the western side slope 13-2 and at the foot of the slope. Meanwhile, the failure also occurs inside the slope. The internal cracks connect through the weak layer of the coal floor and slide along the weak layer of the coal floor 13-2. The displacement evolution law of the slope monitoring point shows that the deformation of the slope is mainly horizontal displacement, the maximum displacement deformation is at the foot of the slope, and the degree of displacement deformation of the slope surface is obviously greater than that of the inside of the slope.
format	article
author	Haoran Li Han Du Runcai Bai Guangwei Liu Mingyuan Zhao Rongzheng Liu
author_facet	Haoran Li Han Du Runcai Bai Guangwei Liu Mingyuan Zhao Rongzheng Liu
author_sort	Haoran Li
title	The Failure Mechanism and Stability of the End Slope of Inclined Composite Coal Seam
title_short	The Failure Mechanism and Stability of the End Slope of Inclined Composite Coal Seam
title_full	The Failure Mechanism and Stability of the End Slope of Inclined Composite Coal Seam
title_fullStr	The Failure Mechanism and Stability of the End Slope of Inclined Composite Coal Seam
title_full_unstemmed	The Failure Mechanism and Stability of the End Slope of Inclined Composite Coal Seam
title_sort	failure mechanism and stability of the end slope of inclined composite coal seam
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/783ab9862cea4ca897e4028cc03c405e
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The Failure Mechanism and Stability of the End Slope of Inclined Composite Coal Seam

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