Dust transport law and dust suppression technology based on gas-solid two-phase flow

Jia, Zhengzhao; Zi-ling, Song; Zhao, Xiaoliang; Fan, Junfu; Jiang, Juyu; Wang, Xiaohe

doi:10.1007/s12517-021-08121-z

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…Alireza developed the ANFIS and RBF methods for modeling of sizing of rock fragmentation due to bench blasting by estimation of 80% passing size (K80) of Golgohar iron mine of Sirjan, Iran (Karami and Afiuni-Zadeh, 2012;Afiuni-Zadeh, 2013, Wang et al, 2021a;Zhang et al, 2021b). Some experts and scholars use numerical simulation or laboratory experiments to analyze and summarize dust migration rules and provide theoretical basis for dust control (Bhandari et al, 2004;Huang et al, 2019b;Jia et al, 2021). Santosh turbulent kinetic energy (TKE) and velocity vector path of dust-air mixture and dust-free air were simulated to understand their effects on coal dust dispersion (Ray et al, 2020;Sobolev et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine

et al. 2022

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In an open-pit mine in Xinjiang, part of the stripped area is covered by burnt rock. Due to the low strength and fragility of burnt rock, dust is more easily generated during blasting. Taking the mining area as the research background, the mechanical property parameters of burnt rock were tested, and the blasting parameter design of on-site operation was understood. The blasting numerical simulation of burnt rock step was carried out by using a numerical simulation software (LS-DYNA). From the angle of stress on rock, the stress cloud and stress curve of numerical simulation are analyzed, and it is concluded that the fundamental reason for the large dust production in blasting operation is that the burnt rock is crushed excessively after the action of explosion wave, and the explosive energy is too large, which is converted into kinetic energy to drive the dust to escape. In order to improve the utilization rate of explosives and reduce the output of blasting dust, the original blasting parameters were optimized as 8-m hole spacing, 6.5-m row spacing, 0.21-kg/m³ unit explosive consumption, 1-m interval charge, and 55-ms short-delay blasting through numerical simulation and orthogonal experiment. In the mining area, the measures of dustproof and dust reduction by blasting protection blanket and dust absorption cotton are adopted. Combined with the optimized blasting parameters, the field test proves that the dust removal efficiency is up to 82.4%.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine

et al. 2022

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Numerical simulation and an experimental test for the pneumatic spray dust reduction of the belt transshipment system

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et al. 2022

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In order to address the problem of dust pollution at the transfer point of the coal transportation system, this paper carries out a numerical simulation on the dust diffusion law of the coal transportation system. The simulation results show that the dust concentration at the three openings in the transshipment point is the highest, and the farther away from the transshipment point, the lower the dust concentration. Depending on the simulation results, a pneumatic spray dust reduction scheme can be proposed by performing a field experiment. Based on the controlling variable experiments and existing studies, the parameters of pneumatic spray can be stated in the following way: the flowing rate should be laid out at 0.7 l/min, with its air velocity being 25 m/s and the working pressure being 0.6 MPa. The entire spray scheme can be verified through the computer simulation process. Thus, it can be calculated and determined that the spray scheme should be installed with four nozzles at the anterior end of the lower belt guide trough, with one nozzle at the back end and two nozzles at the upper belt feeding point. Eventually, the scheme has to be validated by the field experiments. Thus, the consequences of the on-spot experiment and test show that the scheme we have suggested is in a position to reduce the dust concentration effectively in the entire area of the transshipment point, bringing about the dust reduction rate over 90%.

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Dust transport law and dust suppression technology based on gas-solid two-phase flow

Cited by 2 publications

References 10 publications

Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine

Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine

Numerical simulation and an experimental test for the pneumatic spray dust reduction of the belt transshipment system

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