Research on failure criteria and collapse height of roadway roof strata based on energy accumulation and dissipation characteristics

Abstract Roof collapse is a form of rock failure driven by energy release. The rectangular elastic thin plate (RETP) model, widely used in coal mining engineering research, reflects the law of the movement of overlying strata of a coal seam. The stress distribution regularity of each delamination ca...

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Autores principales:	Zhu Li, Hong Zhang, Ze Jiang, Guorui Feng, Jiaqing Cui, Jingkai Ma
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	elastic thin plate energy evolution roof caving height roadway support scheme Technology T Science Q
Acceso en línea:	https://doaj.org/article/cf352c4665684922be1d435257e73995
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spelling	oai:doaj.org-article:cf352c4665684922be1d435257e739952021-12-02T05:24:30ZResearch on failure criteria and collapse height of roadway roof strata based on energy accumulation and dissipation characteristics2050-050510.1002/ese3.926https://doaj.org/article/cf352c4665684922be1d435257e739952021-12-01T00:00:00Zhttps://doi.org/10.1002/ese3.926https://doaj.org/toc/2050-0505Abstract Roof collapse is a form of rock failure driven by energy release. The rectangular elastic thin plate (RETP) model, widely used in coal mining engineering research, reflects the law of the movement of overlying strata of a coal seam. The stress distribution regularity of each delamination can be analyzed using the theoretical model of RETPs. In this study, a new method for determining both the height of the caving zone and the damaged area of the roadway roof is developed based on the energy evolution law. The damaged area and the oval‐shaped boundary of each stratum are determined using the damage criterion deduced by calculating the strain energy of the elementary volume. As a case study, the collapse height was obtained by accumulating the thickness of damaged strata, and the length of bolts was increased from 2.2 m to 2.8 m, effectively preventing the reoccurrence of a roof collapse for the No. 30102 working face in Nanliang Coal Mine. In addition, the vertical boundary of the caved zone can be outlined by connecting and fitting the end vertexes of the minor axis in the oval‐shaped damaged area of the RETPs. The supporting angle of the bolts in two side walls of the roadway was decreased from 75° to 70°. This method was verified and applied in a roof collapse investigation by determining the length and drilling angle of the anchor rod and anchor cable required to develop reasonable support schemes. The results of this research can be used for ensuring safety in coal mining and subway or tunnel construction in China.Zhu LiHong ZhangZe JiangGuorui FengJiaqing CuiJingkai MaWileyarticleelastic thin plateenergy evolutionroof caving heightroadway support schemeTechnologyTScienceQENEnergy Science & Engineering, Vol 9, Iss 12, Pp 2461-2473 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	elastic thin plate energy evolution roof caving height roadway support scheme Technology T Science Q
spellingShingle	elastic thin plate energy evolution roof caving height roadway support scheme Technology T Science Q Zhu Li Hong Zhang Ze Jiang Guorui Feng Jiaqing Cui Jingkai Ma Research on failure criteria and collapse height of roadway roof strata based on energy accumulation and dissipation characteristics
description	Abstract Roof collapse is a form of rock failure driven by energy release. The rectangular elastic thin plate (RETP) model, widely used in coal mining engineering research, reflects the law of the movement of overlying strata of a coal seam. The stress distribution regularity of each delamination can be analyzed using the theoretical model of RETPs. In this study, a new method for determining both the height of the caving zone and the damaged area of the roadway roof is developed based on the energy evolution law. The damaged area and the oval‐shaped boundary of each stratum are determined using the damage criterion deduced by calculating the strain energy of the elementary volume. As a case study, the collapse height was obtained by accumulating the thickness of damaged strata, and the length of bolts was increased from 2.2 m to 2.8 m, effectively preventing the reoccurrence of a roof collapse for the No. 30102 working face in Nanliang Coal Mine. In addition, the vertical boundary of the caved zone can be outlined by connecting and fitting the end vertexes of the minor axis in the oval‐shaped damaged area of the RETPs. The supporting angle of the bolts in two side walls of the roadway was decreased from 75° to 70°. This method was verified and applied in a roof collapse investigation by determining the length and drilling angle of the anchor rod and anchor cable required to develop reasonable support schemes. The results of this research can be used for ensuring safety in coal mining and subway or tunnel construction in China.
format	article
author	Zhu Li Hong Zhang Ze Jiang Guorui Feng Jiaqing Cui Jingkai Ma
author_facet	Zhu Li Hong Zhang Ze Jiang Guorui Feng Jiaqing Cui Jingkai Ma
author_sort	Zhu Li
title	Research on failure criteria and collapse height of roadway roof strata based on energy accumulation and dissipation characteristics
title_short	Research on failure criteria and collapse height of roadway roof strata based on energy accumulation and dissipation characteristics
title_full	Research on failure criteria and collapse height of roadway roof strata based on energy accumulation and dissipation characteristics
title_fullStr	Research on failure criteria and collapse height of roadway roof strata based on energy accumulation and dissipation characteristics
title_full_unstemmed	Research on failure criteria and collapse height of roadway roof strata based on energy accumulation and dissipation characteristics
title_sort	research on failure criteria and collapse height of roadway roof strata based on energy accumulation and dissipation characteristics
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/cf352c4665684922be1d435257e73995
work_keys_str_mv	AT zhuli researchonfailurecriteriaandcollapseheightofroadwayroofstratabasedonenergyaccumulationanddissipationcharacteristics AT hongzhang researchonfailurecriteriaandcollapseheightofroadwayroofstratabasedonenergyaccumulationanddissipationcharacteristics AT zejiang researchonfailurecriteriaandcollapseheightofroadwayroofstratabasedonenergyaccumulationanddissipationcharacteristics AT guoruifeng researchonfailurecriteriaandcollapseheightofroadwayroofstratabasedonenergyaccumulationanddissipationcharacteristics AT jiaqingcui researchonfailurecriteriaandcollapseheightofroadwayroofstratabasedonenergyaccumulationanddissipationcharacteristics AT jingkaima researchonfailurecriteriaandcollapseheightofroadwayroofstratabasedonenergyaccumulationanddissipationcharacteristics
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Research on failure criteria and collapse height of roadway roof strata based on energy accumulation and dissipation characteristics

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