Soft Rock Roadway Mesh Shell Lining Experimental Study of the Mechanical Properties

Li, Hong Xia; Wang, Yong Wei; Tang, Bai Xiao

doi:10.4028/www.scientific.net/amr.671-674.774

Cited by 3 publications

(2 citation statements)

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“…Meng studied the mechanical properties and influencing factors of mudstone in coastal coal measures and proposed that the compressive strength and elastic modulus of mudstone decrease with the increase of water content [14]. Li et al experimented to study on the softening characteristics of mudstone in relation to moisture content [15] and showed that moisture content has a significant effect on shear properties reduction of mudstone and stress concentration is negatively correlated with moisture content. Wang investigated the pore structure and water imbibition behaviour through the mercury injection experiment [16] and proposed that the expansion deformation can be controlled by strengthening the lateral restraint.…”

Section: Introductionmentioning

confidence: 99%

Influence of Moisture Content on the Structural Characteristics of Argillaceous Weakly Consolidated Rock Caused by Dynamic Loading in the Coal Mine

Meng

Han

Zhu

et al. 2021

Shock and Vibration

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The argillaceous weakly consolidated rock is a kind of soft rock that will bring great difficulties in the construction process. Specimens of such rock under different moisture contents are taken as the research object. By the Hopkinson pressure bar test (SHPB), the structural and mechanical characteristics of the rock under dynamic impact are analysed. With increasing moisture content, the transmitted wave amplitude decreases gradually, which indicates that the higher the moisture content of the rock is, the easier it is to deform under dynamic impact and the greater its plasticity. The boundary between plastic failure and brittle failure is 10% moisture content. Through a mercury injection test, the porosity variation is analysed. The porosity of the rock decreases with increasing moisture content after the same dynamic impact. The porosity curve can be roughly divided into two sections with a moisture content of 15% as the boundary. Based on a uniaxial compression test, the elastic modulus, peak strength, and residual strength of specimens after dynamic impact are analysed, and the mechanical properties of the rock are revealed. Its mechanical properties can be divided into three sections with a moisture content of 9.18% and 15.19%, and each section has obvious differences.

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Section: Introductionmentioning

confidence: 99%

Influence of Moisture Content on the Structural Characteristics of Argillaceous Weakly Consolidated Rock Caused by Dynamic Loading in the Coal Mine

Meng

Han

Zhu

et al. 2021

Shock and Vibration

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“…At present, domestic and international scholars have conducted much scientific research and many industrial experiments on the mechanical properties [11][12][13], deformation, failure characteristics and mechanism [14,15], and theory and technology of soft rock roadways and surrounding rock control [16,17]. Little research has been performed on argillaceous weakly cemented rock [18,19], and even less work has been conducted to analyze the dynamic characteristics of such rock under dynamic loads.…”

Section: Introductionmentioning

confidence: 99%

Study on Characteristic and Energy of Argillaceous Weakly Cemented Rock under Dynamic Loading by Hopkinson Bar Experiment

et al. 2020

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To study the mechanical properties of argillaceous weakly cemented rock under dynamic loading, a sample reconstituted and graded loading scheme is firstly designed, and then the reorganization rock sample is used as the research object. Using a Hopkinson pressure bar test, the responses of an argillaceous weakly cemented rock mass under different reorganization loads and different impact velocities is studied, and changes in specimen shape after impact are also analyzed. The study found that with increased of the recombination load, the amplitude of the transmitted wave increases. With increasing impact velocity, the rate of the increase in the incident wave amplitude is much larger than that of the transmission wave amplitude. The dynamic stress–strain curve can be divided into a compaction stage, an approximate linear elastic stage, a microcrack growth stage and a strain softening stage. The larger the reorganization load is, the less obvious the compression stage of the stress–strain curve is, and the greater the elastic modulus is. The peak strength and elastic modulus increase with increasing strain rate before 500 s−1. When the reorganization load is increased, the deformation decreases, and its impact resistance increases. With increasing impact velocity, the deformation of the specimen increases.

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Study on the Influence of Formation Temperature on the Water Absorption and Weathering of Swelling Rock in Marine Coal Mines

et al. 2021

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Soft Rock Roadway Mesh Shell Lining Experimental Study of the Mechanical Properties

Cited by 3 publications

References 0 publications

Influence of Moisture Content on the Structural Characteristics of Argillaceous Weakly Consolidated Rock Caused by Dynamic Loading in the Coal Mine

Influence of Moisture Content on the Structural Characteristics of Argillaceous Weakly Consolidated Rock Caused by Dynamic Loading in the Coal Mine

Study on Characteristic and Energy of Argillaceous Weakly Cemented Rock under Dynamic Loading by Hopkinson Bar Experiment

Study on the Influence of Formation Temperature on the Water Absorption and Weathering of Swelling Rock in Marine Coal Mines

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