Micro-failure process and failure mechanism of brittle rock under uniaxial compression using continuous real-time wave velocity measurement

Wu, Zhijun; Wang, Zhiyang; Fan, Lifeng; Weng, Lei; Liu, Quansheng

doi:10.1007/s11771-021-4621-1

Cited by 48 publications

(16 citation statements)

References 59 publications

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“…It is necessary to create a monitored family of points in the BIM of the deep foundation pit. According to deep foundation pit support design documents and monitored requirements, deep foundation pit monitored information generally includes data on pile deformation, the vertical and horizontal displacement of the pile top, subsidence (Wang et al, 2021), the horizontal and vertical displacement of the slope top, the axial force of the internal support, ground subsidence (Su et al, 2021), groundwater (Wu et al, 2021), and the subsidence of surrounding buildings, pipelines, and roads (Dou et al, 2021), etc. In this study, the family of monitored points was categorized as foundation pit slope top displacement, surrounding building subsidence, road and pipeline subsidence, deep soil displacement, and anchor rod (an anchor cable) axial force.…”

Section: Creating a Family Of Monitored Points In The Bim Of The Deep...mentioning

confidence: 99%

BIM Digital Shadow Technology and Risk Assessment Method of the Deep Foundation Pit’s Behavior for Zibo Light Rail

Yuan

Yuan²,

Chen³

et al. 2022

Front. Earth Sci.

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With the shortage of land resources, there has been a trend toward increasingly deep foundation pit engineering in urban areas. It is extremely important to reflect on the behavior and safety of deep foundation pits and conduct risk assessments in time. A nonhomologous and multi-indicator deep foundation pit risk assessment model was studied for nine types of nonhomologous on-site data monitored in the deep foundation pit. Based on the BIM (Building Information Modeling) technology, a family of monitored points was created that reflects the information on site from a deep foundation pit. The data visualization module was redeveloped by using Visual Studio 2019 to map the on-site data monitored to the components in the BIM model, which can visualize the data monitored in the BIM model of deep foundation pits. On this basis, the assessment of the safety level of deep foundation pits was realized in combination with a risk assessment model. Through the instance of the deep foundation pit of Zibo light rail, the analysis shows that the new visualization and risk assessment method can help construction workers locate dangerous units and formulate corresponding prevention and control measures better and faster.

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Section: Creating a Family Of Monitored Points In The Bim Of The Deep...mentioning

confidence: 99%

BIM Digital Shadow Technology and Risk Assessment Method of the Deep Foundation Pit’s Behavior for Zibo Light Rail

Yuan

Yuan²,

Chen³

et al. 2022

Front. Earth Sci.

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“…The relevant research results of weakly cemented rocks focus on the basic physical and mechanical properties, seepage characteristics, and micro components [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. The possibility of forecasting the UCS of weakly cemented rocks using their unit weight, P-wave velocity, tensile strength, and elastic modulus was investigated by Wang et al [32].…”

Section: Introductionmentioning

confidence: 99%

Study of the Influence of Clay Minerals on the Mechanical and Percolation Properties of Weakly Cemented Rocks

Guo

Yang

et al. 2022

Geofluids

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The weakly cemented rock layer is easily damaged under the combined effect of seepage and mining disturbance and creates massive engineering disasters. This paper uses the self-designed weakly cemented remodeling mechanism to prepare weakly cemented rock samples with clay minerals accounting for 20%, 30%, 40%, 50%, and 60% of the total. The MTS816 system, in conjunction with an acoustic emission system and a high-speed camera, completed mechanical and seepage tests on the sample. The results show that when the quantity of clay minerals increases, the uniaxial compressive strength, elastic modulus, and rapid crack propagation stress of the weakly cemented rock samples decrease. Initial stress of crack development increases and then decreases, as well as the sample’s failure mode changes from shear to tensile. The sample’s permeability increases with increasing osmotic and axial pressure differential but decreases with increasing confining pressure under the same amount of clay minerals. The sensitivity of permeability to changes in osmotic pressure differential, axial pressure, and confining pressure increases as the amount of clay minerals increases. The mechanical and seepage characteristics can show significant changes in clay minerals in 20% to 30%.

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“…Rockburst is a complex mine dynamic disaster, which often releases elastic properties in the form of sudden, sharp, and violent, resulting in instantaneous damage of coal and rock strata, accompanied by throwing out of coal and rock mass, loud noise, and gas wave, resulting in serious casualties and property losses [1][2][3][4][5][6][7][8][9]. According to statistics, by the end of 2020, the number of rockburst mines in China has exceeded 144, which has a serious impact on the smooth output of China's coal resources [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Research on Optimal Design of Pressure Relief Blasting Parameters of Middle Rock Pillar in Near Vertical Coal Seam

Wang

Rong

et al. 2022

Shock and Vibration

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In order to prevent the occurrence of rockburst accident caused by the stress concentration of the middle rock pillar in the near-vertical coal seam and affect the mining of the lower coal seam in the known goaf, taking Wudong coal mine in Xinjiang as an example, based on the special geological and mining conditions of the mine, through the simulation experiment and numerical analysis of similar materials, the variation law of the stress distribution of the middle rock pillar with the increase in mining depth is analyzed. A presplitting blasting pressure relief technology of drilling a construction chamber in the middle of the rock column is proposed to form a buffer layer in the rock wall and effectively prevent the continuous downward movement of stress. In order to achieve the optimal blasting effect, the finite element numerical simulation software GTS NX is used to carry out the chamber rock mass hole blasting simulation experiment, the three influencing factors of blasting effect, such as charge quantity, blast hole diameter, and blast hole row spacing, are comprehensively considered, and the optimal pressure relief blasting parameters with the radius of borehole blasting crack circle and the width of plastic zone as the index are determined. The experimental results show that under the condition of determining the physical and mechanical parameters of coal and rock, the blast hole diameter has become the main control factor affecting the blasting pressure relief effect, followed by the charge amount. Through 9 groups of orthogonal tests, the optimal combination of the three indexes is 6 kg charge, 150 mm hole diameter and 10 m hole row spacing. The practical engineering application results of the combination are tested by downhole transient electromagnetic detection (TEM), and it is found that the pressure relief effect is obvious. The preliminary conclusions of the study have guiding significance for the pressure relief and erosion prevention of the middle rock pillar in Wudong mine and provide experimental methods and theoretical basis for the determination of blasting pressure relief parameters in other mines.

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Micro-failure process and failure mechanism of brittle rock under uniaxial compression using continuous real-time wave velocity measurement

Cited by 48 publications

References 59 publications

BIM Digital Shadow Technology and Risk Assessment Method of the Deep Foundation Pit’s Behavior for Zibo Light Rail

BIM Digital Shadow Technology and Risk Assessment Method of the Deep Foundation Pit’s Behavior for Zibo Light Rail

Study of the Influence of Clay Minerals on the Mechanical and Percolation Properties of Weakly Cemented Rocks

Research on Optimal Design of Pressure Relief Blasting Parameters of Middle Rock Pillar in Near Vertical Coal Seam

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