A Study on Theoretical Consideration and Numerical Analysis According to Dip Angle of Joint for Volumetric Expansion Ratio of Rock Mass

Lee, Seung-Joong; Choi, Sung O.

doi:10.1080/12269328.2011.10541323

Cited by 4 publications

(2 citation statements)

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“…However, when UDEC simulates large-scale excavation, the subsidence of fractured zone rock strata is almost equal to the mining height, which means the UDEC cannot reflect the expansion characteristics of the caving zone and makes the calculated deformation value of surrounding rock and failure along gob-side entry retention too large. e viewpoint is supported by other researchers [15]. In a study by Lu et al [16], a customized constitutive model with the consideration of expansion was applied to UDEC, but this way is pretty complicated.…”

Section: Numerical Simulation Methods For Load-bearing Characteristicsmentioning

confidence: 99%

Numerical Analyses on Deformation and Failure Characteristics of Surrounding Rock of Gob‐Side Entry Retention by Roof Cutting

Liu

Yang

et al. 2021

Advances in Civil Engineering

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Universal distinct element code (UDEC) is a simulation software based on the discrete element method, widely used in geotechnical mining. However, in the UDEC, when simulating large-scale excavation, the subsidence of the fractured zone is almost equal to the mining height, which makes the deformation value calculated in the study of gob-side entry retention too large. To solve this problem, in this paper, the double-yield constitutive model is applied to the whole caving zone to analyze the deformation and failure characteristics of surrounding rock along gob-side entry retaining by roof cutting. The results of the simulation are in good agreement with the result of drilling peeking (drilling observation by borehole televiewer) and field condition (observation and measurement in the field). Finally, by using this numerical method, the effects of roadway width, temporary support, and coal side support on the failure of the roof and the arc coal side are studied.

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Section: Numerical Simulation Methods For Load-bearing Characteristicsmentioning

confidence: 99%

Numerical Analyses on Deformation and Failure Characteristics of Surrounding Rock of Gob‐Side Entry Retention by Roof Cutting

Liu

Yang

et al. 2021

Advances in Civil Engineering

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“…In conclusion, based on the uniaxial compression test data [22] and the suggestions of related literature [34][35][36][37][38][39][40], and through numerical simulation optimization, the model parameters of sandstone in the corroded area and uncorroded area are determined as shown in Table 1.…”

Section: G(σ) �mentioning

confidence: 99%

Three‐Dimensional Reconstruction and Numerical Simulation Analysis of Acid‐Corroded Sandstone Based on CT

Miao

Xie

et al. 2021

Shock and Vibration

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Due to its unique technological characteristics, coal mining and production often encounter an acid corrosion environment caused by acid gases. Acid erosion and a series of chemical reactions caused by it often led to the deterioration of coal, rock, support structure, etc. and induced serious safety accidents. To further explore the macro-mesoscopic damage evolution law and failure mechanisms of rock masses under corrosion conditions through numerical simulation, a zonal refined numerical model that can reflect the acid corrosion characteristics of sandstone is established based on CT and digital image processing (DIP). The uniaxial compression test of corroded sandstone is simulated by ABAQUS software. Comparing the numerical simulation results with the physical experiment results, we found that the three-dimensional finite element model based on CT scanning technology can genuinely reflect sandstone’s corrosion characteristic. The numerical simulation results of the stress-strain curve and macroscopic failure mode of the acid-corroded sandstone are in good agreement with the experimental results, which provides a useful method for further studying the damage evolution mechanism of the acid-corroded rock mass. Furthermore, the deformation and damage evolution law of the corroded sandstone under uniaxial compression is qualitatively analyzed based on the numerical simulation. The results show that the rock sample’s axial displacement decreases gradually from top to bottom under the axial load, and the vertical variation is relatively uniform. In contrast, the rock sample’s removal gradually increases with the increase of axial pressure, and the growth presents a certain degree of nonuniformity in the vertical. The acid-etched rock sample’s damage starts from both the end and the middle; it first appears in the corroded area. Moreover, with the displacement load increase, it gradually develops and is merged in the middle of the rock sample and forms macroscopic damage.

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Assessment of Subsidence Hazard in Abandoned Mine Area Using Strength Reduction Method

et al. 2022

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A Study on Theoretical Consideration and Numerical Analysis According to Dip Angle of Joint for Volumetric Expansion Ratio of Rock Mass

Cited by 4 publications

References 0 publications

Numerical Analyses on Deformation and Failure Characteristics of Surrounding Rock of Gob‐Side Entry Retention by Roof Cutting

Numerical Analyses on Deformation and Failure Characteristics of Surrounding Rock of Gob‐Side Entry Retention by Roof Cutting

Three‐Dimensional Reconstruction and Numerical Simulation Analysis of Acid‐Corroded Sandstone Based on CT

Assessment of Subsidence Hazard in Abandoned Mine Area Using Strength Reduction Method

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