Analysis on mechanical properties and mesoscopic acoustic emission characteristics of prefabricated fracture cemented paste backfill under different loading rates

Song, Xuepeng; Yuan, Quan; Wang, Shi; Dong, Zilin; Hao, Yuxin

doi:10.1007/s11356-022-23979-6

Cited by 7 publications

(1 citation statement)

References 34 publications

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“…Te numerical simulation results based on the particle fow code (PFC) are consistent with the feld observations, and it provides several unique advantages in studying the development of internal joint fractures of loaded materials [21]. Song et al [22] by using the PFC verifed the results against experimental observations. Considering these aspects, this study was aimed at using the particle fow theory to quantitatively analyze the efects of the loading rate on the stress-strain, rupture state, energy, damage, and fracture evolution of the backfll during stress and strain cycles, rupturing, and failure by establishing a cementation model to simulate uniaxial compression experiments under diferent loading rates.…”

Section: Introductionmentioning

confidence: 57%

PFC2D-Based Analysis of the Effect of the Axial Loading Rate on the Mechanical Properties of Backfill

Kun

Wang

2023

Advances in Materials Science and Engineering

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The unloading failure process in mining engineering scenarios is similar to the loading failure process at different loading rates indoor. To clarify the relationship between the mechanical properties of backfill and the loading rate, a particle flow code 2D-based numerical simulation was performed to establish the backfill model, and tests involving five loading rates were conducted. The following results were obtained: (1) the compressive strength of the backfill body increases linearly with the increase in the loading rate. The peak strain increases in an S-shaped manner, and the modulus of elasticity first increases and then decreases. (2) The evolution of cracks is similar to that of damage energy consumption, and a smaller rate means that the curve’s inflection point arrives earlier. (3) Tensile failure is the dominant failure mode. As the rate increases, the model destruction mode transforms from single to multiple failures, and the crack distribution becomes denser. (4) The backfill body exhibits a uniform destruction form at all loading rates. However, the difference in the loading rate leads to different energy consumption growth rates and total energy consumption.

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Section: Introductionmentioning

confidence: 57%