Experimental Research on Creep Failure Characteristics of Gypsum Rock Based on Rock Longitudinal Wave Velocity

Zhi-he, Liu; Huai-chang, Zheng; Li, Ming

doi:10.1007/s10706-018-0704-7

Cited by 12 publications

(4 citation statements)

References 2 publications

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“…Based on the statistical analysis of the detection data of the grouting treatment in the goaf for many years, the transverse wave speed in the hole should be greater than 250 m/s for examining and accepting the quality of the grouting in the goaf of a subgrade [18]. After the grouting, the transverse wave speeds of all the strata exceed 250.0 m/s, indicating that the compactness of all the strata is strengthened after the grouting and that the grouting effect is good [19][20][21][22].…”

Section: Detection and Analysis Of Acoustic Wavesmentioning

confidence: 99%

Integrated Treatment Technology of Storage‐Mining Inclined Goaf under Expressway

Wei-xing

Wang

et al. 2020

Advances in Civil Engineering

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An inclined goaf caused by storage mining is a serious risk to subgrades and pavements. In this paper, effective investigation and detection methods of goafs were discussed considering the project of the Urumqi East Ring Expressway crossing the existing goaf of Zhongxing no. 2 mine. Moreover, by theoretical analysis and a series of field comparative tests, reasonable grouting parameters and the treatment plan were obtained. By comparing the test results of the field and laboratory, the influence of groundwater on the effect of grouting was revealed to reduce the compressive strength of the consolidating objects of the slurry. The high-density resistivity method presented strong anti-interference ability and high accuracy in a depth range of less than 150 m in the investigation of the goaf. The results of the treatment showed that it is necessary to conduct research and analysis from multiple aspects to obtain the best treatment plan of a goaf and ensure the safety of a project.

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Section: Detection and Analysis Of Acoustic Wavesmentioning

confidence: 99%

Integrated Treatment Technology of Storage‐Mining Inclined Goaf under Expressway

Wei-xing

Wang

et al. 2020

Advances in Civil Engineering

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“…With the development of engineering construction, projects such as traffic slopes, hydropower reservoir bank slopes, and mine open-pit slopes are inevitably in a certain rainfall and groundwater environment [27][28][29][30][31][32][33][34]. The engineering rock mass is subjected to repeated dry and wet cycles, resulting in repeated damage and deterioration of the mechanical properties of the rock mass [35][36][37][38][39], exacerbating the creep effect of the engineering rock mass, which in turn affects the long-term aging stability of the engineering rock mass [40][41][42][43][44][45][46][47][48]. Therefore, it is of great significance to explore the creep mechanical properties of rock under dry-wet cycle for studying the long-term aging stability of engineering rock and soil.…”

Section: Introductionmentioning

confidence: 99%

Study on creep mechanical properties of carbonaceous shale under dry-wet cycle

Wei¹,

et al. 2023

Phys. Scr.

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The creep mechanical properties of rock under dry-wet cycles are of great significance for studying the long-term aging stability of engineering rock and soil. In the past, there were few studies in this area, and most of the dry-wet cycle tests on rock samples did not conform to the actual stress state of the rock. In view of the shortcomings of these studies, this paper innovatively carried out the dry-wet cycle test of the rock under the continuous state of the stress field, and studied its mechanical properties. The specific method is to take carbonaceous shale as the research object, and use the soft rock shear rheological test system independently developed by our research group to carry out the shear creep test of carbonaceous shale under the action of dry-wet cycle. The test results show that the creep full-time curves of carbonaceous shale under different dry-wet cycles show a step-shaped curve shape. The dry-wet cycle has a significant effect on the deformation characteristics of carbonaceous shale. With the increase of the number of dry-wet cycles, the instantaneous strain of the rock gradually increases, the instantaneous shear modulus decreases from 596.650 MPa at 0 times to 365.199 MPa at 12 times, and the attenuation rate reaches 38.79 %. The creep strain and cumulative creep strain become larger, the stress required for accelerated creep decreases from 3.29 MPa to 2.75 MPa, and the accelerated creep time in the third stage increases from 11.892 h to 5.316 h, and the creep effect is more significant. The long-term strength of carbonaceous shale decreases from 3.05 MPa to 2.49 MPa, and the decrease increases with the increase of dry-wet cycles. The more the number of dry-wet cycles, the smaller the undulation of the shear failure section of the carbonaceous shale, and the smoother the surface. The research results have important guiding significance for the long-term aging stability analysis of engineering rock and soil mass subjected to repeated dry-wet cycles.

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“…The physical and mechanical properties of gypsum rocks differ significantly to those of other rocks, e.g., their easy weathering and typical creep characteristics [17][18][19]. Currently, research pertaining to blasting and disturbance damage to gypsum rocks is limited.…”

Section: Introductionmentioning

confidence: 99%

Damage Mechanism and Stress Distribution of Gypsum Rock Pillar Subjected to Blasting Disturbance

et al. 2022

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The room-pillar mining technology of underground gypsum resources results in numerous gypsum rock pillars for controlling and supporting mined gobs, which forms a large area of roof hanging gobs. Owing to weathering and mining activities, gypsum rock pillar damage and failure will occur, thereby inducing a large area of gypsum mined-gob collapse accidents and disasters. Blasting is vital to the stability of gypsum rock pillars and is indispensable in mining engineering. Based on field blasting tests and using wave velocity as the basic parameter to characterise the integrity of gypsum rock, the damage mechanism of gypsum rock pillars subjected to blasting disturbance is investigated. With ten blasting tests, the maximum damage rate is 7.82% along the horizontal direction of pillar, and 3.52% along the vertical direction. The FLAC numerical simulation calculation software is used to analyse the stress distribution law of gypsum rock pillars with disturbances of different strengths from different distances. As the disturbance strength increased, the stress increased with no clear linear relationship; as the disturbance distance increased, the stress decreased gradually with a linear relationship. All stress after disturbance is greater than the original static stress, and lower than the ultimate compressive strength. However, the correlation between blasting tests results and numerical simulation results is poor and is discussed for many factors. The results can provide important guidance and reference for clarifying the damage mechanism of gypsum rock pillars subjected to blasting disturbance, as well as reveal the collapse mechanism of gypsum mined gobs.

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Experimental Research on Creep Failure Characteristics of Gypsum Rock Based on Rock Longitudinal Wave Velocity

Cited by 12 publications

References 2 publications

Integrated Treatment Technology of Storage‐Mining Inclined Goaf under Expressway

Integrated Treatment Technology of Storage‐Mining Inclined Goaf under Expressway

Study on creep mechanical properties of carbonaceous shale under dry-wet cycle

Damage Mechanism and Stress Distribution of Gypsum Rock Pillar Subjected to Blasting Disturbance

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