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Article: Gas inclusions and their expansion power as foundation of rock “locked in” stress hypothesis

TitleGas inclusions and their expansion power as foundation of rock “locked in” stress hypothesis
奠基岩石“封闭应力”假说的气体包裹体和膨胀能力
Authors
Issue Date2014
PublisherScience Press. The Journal's web site is located at http://c.wanfangdata.com.cn/Periodical-gcdzxb.aspx
Citation
工程地质学报, 2014, v. 22 n. 4, p. 739-756 How to Cite?
Journal of Engineering Geology, 2014, v. 22 n. 4, p. 739-756 How to Cite?
AbstractAbout 35 years ago, Professor TAN Tjong-Kie proposed the hypothesis of rock “locked in” stresses and considered the “locked in” stresses were the failure cause of rock engineering projects. In recent years, Professor WANG Sijing and Professor QIAN Qihu have made some qualitative discussions on the hypothesis. However, this hypothesis has received very little attention and quantitative investigation. In this paper, the author puts forward and attempts to show that the tiny gas (or liquid) inclusions in contact rocks are a specific, concrete and measurable inclusion type of variable and considerable “locked in” stresses and kinetic energy. The pressure and volumetric expansion energy of a gas inclusion are a type of “locked in” (or sealed) stresses and internal deformation energy of actual existence and active power. The author gives the governing equations to calculate the pressure and volumetric expansion energy of gas inclusions, which is shown with calculation examples. The pressure of the gas inclusions is equivalent to the average value of the in-situ stresses in deep rocks. The gas inclusions, sealed in micro-defects or voids of deep rocks, are the common tensile or expanding volumetric force sources for the occurrences of many failures in the surrounding rocks of excavated or engineered caverns or tunnels in deep rock ground. Because of differences in the physical and mechanical properties of the surrounding rocks, the compressed and dense gas inclusions can cause the following three results and/or phenomena. They are (a) stable walls, (b) brittle fractures and (c) large deformation of the surrounding rocks. Hard and brittle intact rocks can have brittle fractures in the forms of rock burst, mine earthquake, rock split, and zonal disintegration. Soft and ductile intact rocks can have the deformation failure in the forms large deformation, creep and pressure bump accordingly. In addition, the gas inclusions with high pressure can be the source of abnormally high in-situ stresses in some special deep rock grounds.
Persistent Identifierhttp://hdl.handle.net/10722/202627
ISSN

 

DC FieldValueLanguage
dc.contributor.authorYue, QZQen_US
dc.date.accessioned2014-09-19T09:14:07Z-
dc.date.available2014-09-19T09:14:07Z-
dc.date.issued2014en_US
dc.identifier.citation工程地质学报, 2014, v. 22 n. 4, p. 739-756en_US
dc.identifier.citationJournal of Engineering Geology, 2014, v. 22 n. 4, p. 739-756en_US
dc.identifier.issn1004-9665-
dc.identifier.urihttp://hdl.handle.net/10722/202627-
dc.description.abstractAbout 35 years ago, Professor TAN Tjong-Kie proposed the hypothesis of rock “locked in” stresses and considered the “locked in” stresses were the failure cause of rock engineering projects. In recent years, Professor WANG Sijing and Professor QIAN Qihu have made some qualitative discussions on the hypothesis. However, this hypothesis has received very little attention and quantitative investigation. In this paper, the author puts forward and attempts to show that the tiny gas (or liquid) inclusions in contact rocks are a specific, concrete and measurable inclusion type of variable and considerable “locked in” stresses and kinetic energy. The pressure and volumetric expansion energy of a gas inclusion are a type of “locked in” (or sealed) stresses and internal deformation energy of actual existence and active power. The author gives the governing equations to calculate the pressure and volumetric expansion energy of gas inclusions, which is shown with calculation examples. The pressure of the gas inclusions is equivalent to the average value of the in-situ stresses in deep rocks. The gas inclusions, sealed in micro-defects or voids of deep rocks, are the common tensile or expanding volumetric force sources for the occurrences of many failures in the surrounding rocks of excavated or engineered caverns or tunnels in deep rock ground. Because of differences in the physical and mechanical properties of the surrounding rocks, the compressed and dense gas inclusions can cause the following three results and/or phenomena. They are (a) stable walls, (b) brittle fractures and (c) large deformation of the surrounding rocks. Hard and brittle intact rocks can have brittle fractures in the forms of rock burst, mine earthquake, rock split, and zonal disintegration. Soft and ductile intact rocks can have the deformation failure in the forms large deformation, creep and pressure bump accordingly. In addition, the gas inclusions with high pressure can be the source of abnormally high in-situ stresses in some special deep rock grounds.en_US
dc.languagechien_US
dc.publisherScience Press. The Journal's web site is located at http://c.wanfangdata.com.cn/Periodical-gcdzxb.aspxen_US
dc.relation.ispartof工程地质学报en_US
dc.relation.ispartofJournal of Engineering Geologyen_US
dc.titleGas inclusions and their expansion power as foundation of rock “locked in” stress hypothesisen_US
dc.title奠基岩石“封闭应力”假说的气体包裹体和膨胀能力en_US
dc.typeArticleen_US
dc.identifier.emailYue, QZQ: yueqzq@hku.hken_US
dc.identifier.authorityYue, QZQ=rp00209en_US
dc.identifier.doi10.13544/j.cnki.jeg.2014.04.022-
dc.identifier.hkuros235666en_US
dc.identifier.volume22en_US
dc.identifier.issue4-
dc.identifier.spage739en_US
dc.identifier.epage756en_US
dc.publisher.placeBeijingen_US

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