Study on the Creep Damage Characteristics of Shale under the Combined Action of Osmotic Pressure and Disturbance Load

In the in situ modified fluidized mining engineering, the surrounding rock of the shaft wall is prone to creep instability damage under the action of disturbance and seepage water pressure, which seriously affects the stability of the surrounding rock of the deep in situ modified fluidized mining. I...

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Autores principales:	Junguang Wang, Qingrong Yu, Bing Liang, Zhangqing Xuan
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi-Wiley 2021
Materias:	Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/92ac38c406d24092b024049fc406db08
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spelling	oai:doaj.org-article:92ac38c406d24092b024049fc406db082021-11-29T00:55:50ZStudy on the Creep Damage Characteristics of Shale under the Combined Action of Osmotic Pressure and Disturbance Load1468-812310.1155/2021/9740302https://doaj.org/article/92ac38c406d24092b024049fc406db082021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/9740302https://doaj.org/toc/1468-8123In the in situ modified fluidized mining engineering, the surrounding rock of the shaft wall is prone to creep instability damage under the action of disturbance and seepage water pressure, which seriously affects the stability of the surrounding rock of the deep in situ modified fluidized mining. In order to study the nonlinear creep damage and fracture characteristics of deep rocks under the combined action of seepage water pressure and disturbance load, a self-developed rock perturbation creep test rig under the action of seepage water pressure was used, and shale was used as the rock sample. In the method of staged loading, the rock uniaxial compression perturbation creep test under static axial pressure, different perturbation frequencies, and different seepage water pressures was carried out, and the creep characteristics of shale under the combined action of perturbation and seepage were studied. The results show that with the increase of seepage water pressure, the creep failure time of the rock decreases, and the ultimate strain value increases; with the increase of the disturbance frequency, the creep failure mode of the rock gradually transitions from shear failure to tension failure. When water pressure and disturbance load exist at the same time, rock creep is more sensitive to seepage water pressure; based on experimental results, a shale perturbation creep damage model considering the influence of seepage water pressure and disturbance frequency is established, and the model is verified. The research results have important theoretical significance for guiding the wellbore stability control of in situ modified fluidized mining engineering.Junguang WangQingrong YuBing LiangZhangqing XuanHindawi-WileyarticleGeologyQE1-996.5ENGeofluids, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geology QE1-996.5
spellingShingle	Geology QE1-996.5 Junguang Wang Qingrong Yu Bing Liang Zhangqing Xuan Study on the Creep Damage Characteristics of Shale under the Combined Action of Osmotic Pressure and Disturbance Load
description	In the in situ modified fluidized mining engineering, the surrounding rock of the shaft wall is prone to creep instability damage under the action of disturbance and seepage water pressure, which seriously affects the stability of the surrounding rock of the deep in situ modified fluidized mining. In order to study the nonlinear creep damage and fracture characteristics of deep rocks under the combined action of seepage water pressure and disturbance load, a self-developed rock perturbation creep test rig under the action of seepage water pressure was used, and shale was used as the rock sample. In the method of staged loading, the rock uniaxial compression perturbation creep test under static axial pressure, different perturbation frequencies, and different seepage water pressures was carried out, and the creep characteristics of shale under the combined action of perturbation and seepage were studied. The results show that with the increase of seepage water pressure, the creep failure time of the rock decreases, and the ultimate strain value increases; with the increase of the disturbance frequency, the creep failure mode of the rock gradually transitions from shear failure to tension failure. When water pressure and disturbance load exist at the same time, rock creep is more sensitive to seepage water pressure; based on experimental results, a shale perturbation creep damage model considering the influence of seepage water pressure and disturbance frequency is established, and the model is verified. The research results have important theoretical significance for guiding the wellbore stability control of in situ modified fluidized mining engineering.
format	article
author	Junguang Wang Qingrong Yu Bing Liang Zhangqing Xuan
author_facet	Junguang Wang Qingrong Yu Bing Liang Zhangqing Xuan
author_sort	Junguang Wang
title	Study on the Creep Damage Characteristics of Shale under the Combined Action of Osmotic Pressure and Disturbance Load
title_short	Study on the Creep Damage Characteristics of Shale under the Combined Action of Osmotic Pressure and Disturbance Load
title_full	Study on the Creep Damage Characteristics of Shale under the Combined Action of Osmotic Pressure and Disturbance Load
title_fullStr	Study on the Creep Damage Characteristics of Shale under the Combined Action of Osmotic Pressure and Disturbance Load
title_full_unstemmed	Study on the Creep Damage Characteristics of Shale under the Combined Action of Osmotic Pressure and Disturbance Load
title_sort	study on the creep damage characteristics of shale under the combined action of osmotic pressure and disturbance load
publisher	Hindawi-Wiley
publishDate	2021
url	https://doaj.org/article/92ac38c406d24092b024049fc406db08
work_keys_str_mv	AT junguangwang studyonthecreepdamagecharacteristicsofshaleunderthecombinedactionofosmoticpressureanddisturbanceload AT qingrongyu studyonthecreepdamagecharacteristicsofshaleunderthecombinedactionofosmoticpressureanddisturbanceload AT bingliang studyonthecreepdamagecharacteristicsofshaleunderthecombinedactionofosmoticpressureanddisturbanceload AT zhangqingxuan studyonthecreepdamagecharacteristicsofshaleunderthecombinedactionofosmoticpressureanddisturbanceload
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Study on the Creep Damage Characteristics of Shale under the Combined Action of Osmotic Pressure and Disturbance Load

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