Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative Analysis
In order to obtain the accurate mechanical parameters of deep-buried coal goaf rock mass, the limitation of geological strength index (GSI) in concealed rock mass is analyzed. Based on the test result and analysis of the current normative standards, the classification indexes of rock mass structural...
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2021-01-01
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Series: | Advances in Civil Engineering |
Online Access: | http://dx.doi.org/10.1155/2021/9935860 |
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doaj-e89a824e2c8940daadb73d6f7eefe35d2021-09-13T01:23:53ZengHindawi LimitedAdvances in Civil Engineering1687-80942021-01-01202110.1155/2021/9935860Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative AnalysisQingqiu Wang0Mo Xu1Yunhui Zhang2Xinyu Cen3Xingwang Chang4State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionState Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionFaculty of Geosciences and Environmental EngineeringState Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionState Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionIn order to obtain the accurate mechanical parameters of deep-buried coal goaf rock mass, the limitation of geological strength index (GSI) in concealed rock mass is analyzed. Based on the test result and analysis of the current normative standards, the classification indexes of rock mass structural are optimized based on discontinuity distance d and rock mass integrity index Kv. The ratio of rock mass saturated strength to dry strength, η, is introduced, quantization formula of structural surface conditions is proposed, and the influence of groundwater and rock types is included in structural surface condition classification. The GSI system is improved to better suit all types of deep-buried and water-rich rock masses. Furthermore, the rock mass disturbance factor D’s quantitative formula is listed according to the Hoek–Brown (HB) criterion. Taking the goaf roof under railway as an example, the parameters of deep-buried rock mass are obtained based on the improved quantitative GSI system and HB criterion. This research provides a scientific reference for achieving geological parameters and engineering designing in goaf areas.http://dx.doi.org/10.1155/2021/9935860 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qingqiu Wang Mo Xu Yunhui Zhang Xinyu Cen Xingwang Chang |
spellingShingle |
Qingqiu Wang Mo Xu Yunhui Zhang Xinyu Cen Xingwang Chang Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative Analysis Advances in Civil Engineering |
author_facet |
Qingqiu Wang Mo Xu Yunhui Zhang Xinyu Cen Xingwang Chang |
author_sort |
Qingqiu Wang |
title |
Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative Analysis |
title_short |
Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative Analysis |
title_full |
Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative Analysis |
title_fullStr |
Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative Analysis |
title_full_unstemmed |
Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative Analysis |
title_sort |
mechanical parameters of deep-buried coal goaf rock mass based on optimized gsi quantitative analysis |
publisher |
Hindawi Limited |
series |
Advances in Civil Engineering |
issn |
1687-8094 |
publishDate |
2021-01-01 |
description |
In order to obtain the accurate mechanical parameters of deep-buried coal goaf rock mass, the limitation of geological strength index (GSI) in concealed rock mass is analyzed. Based on the test result and analysis of the current normative standards, the classification indexes of rock mass structural are optimized based on discontinuity distance d and rock mass integrity index Kv. The ratio of rock mass saturated strength to dry strength, η, is introduced, quantization formula of structural surface conditions is proposed, and the influence of groundwater and rock types is included in structural surface condition classification. The GSI system is improved to better suit all types of deep-buried and water-rich rock masses. Furthermore, the rock mass disturbance factor D’s quantitative formula is listed according to the Hoek–Brown (HB) criterion. Taking the goaf roof under railway as an example, the parameters of deep-buried rock mass are obtained based on the improved quantitative GSI system and HB criterion. This research provides a scientific reference for achieving geological parameters and engineering designing in goaf areas. |
url |
http://dx.doi.org/10.1155/2021/9935860 |
work_keys_str_mv |
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1717754972773285888 |