Mechanical behaviour and acoustic emission characteristics of the reinforced soft muddy rock under various moisture content levels

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外文摘要：In order to investigate the failure mechanism of the reinforced muddy soft rock under the influence of the hydration reac-tion when ground water is present,a series of confined compressive tests and Acoustic Emission(AE)recordings were conducted subject to various moisture content levels and lateral confining stresses.It was found that the failure modes of the reinforced rock specimen were affected by the moisture content level and the lateral stress σ2 in a way that the load bearing capacity of the reinforced rock would increase with the lateral stress σ2 but decrease as the moisture content increased.An increase in the moisture content would reduce the extent of the influence of the lateral stress on the load bearing capacity of the reinforced rock.In addition,much less AE counts were recorded when the moisture content increased indicating that the crack initiation and propagation in this case was easier due to the reduction of the required external input energy.With increasing moisture content,the failure mode of the specimen gradually changes from sudden and brittle to progressive and ductile.Moreover,the hydration reaction became more significant leading to a complete debonding between the grout and the rock.Consequently,the reinforcement provided by the rock bolt to the rock became negligible.

外文关键词：

MudstoneAnchorage structureReinforced rockHydrationBearing capacity

作者：

Haoyu Rong、Wei Wang、Guichen Li、Guangming Zhao、Dongxu Liang、Jiahui Xu

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作者单位：

College of Civil and Transportation Engineering,Hohai University,Nanjing,China

School of Mines,Key Laboratory of Deep Coal Resource Mining,Ministry of Education of China,China University of Mining and Technology,Xuzhou,China

School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan,China

School of Civil Engineering,Xuzhou University of Technology,Xuzhou,China

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出版年：

2024

DOI：

10.1007/s40789-024-00733-6

国际煤炭科学技术学报(英文)

CSTPCD

ISSN：2095-8293

年,卷(期)：2024.11(6)