The diffusion behavior law of respirable dust at fully mechanized caving face in coal mine: CFD numerical simulation and engineering application

Zhou, Gang; Zhang, Qi; Bai, Ruonan; Fan, Tao; Wang, Gang

doi:10.1016/j.psep.2016.12.005

Cited by 209 publications

(60 citation statements)

References 14 publications

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“…In mines the main dust prevention methods include water spray, foam technology, coal seam infusion, ventilation or individual protection [50][51]. The use of dust masks is a very basic and important source of dust protection, especially when workers mine coal Table 6.…”

Section: Significance Of Occupational and Physical Factors For Prevalmentioning

confidence: 99%

Dust Generation and Respiratory Impact of Underground Coal-Producing mines in Pakistan

Ijaz

Akram

Ahmad

et al. 2020

Pol. J. Environ. Stud.

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Coal is a major source of energy in developing countries. Its underground mining exposes workers to respirable dust containing silica, causing respiratory illness. The objectives of this study include measuring this dust and the percentage of its silica content and evaluating the prevalence of respiratory diseases among coal cutters. A walkthrough survey performa, SKC Airchek 52 (SKC Inc., eighty four, PA, USA) air sampling pumps, an anemometer, hygrometer, multi-gas detector, a thermometer and modified International Union Against Tuberculosis and Lung Disease (IUATLD) respiratory questionnaire were used to collect data from 64 workers working in 5 different mines of Chakwal District in Punjab, Pakistan. Mine E, with the lowest ventilation volumetric flow rate (18m 3 /s), has the highest dust concentration (6.10 mg/m 3 , silica content 2.699%). Conversely, mine A, with the highest ventilation volumetric flow rate (45 m 3 /s), has the lowest dust concentration (2.58 mg/m 3 , 1.33 % silica content). Survey results show that 71% of workers inherited this occupation, 94% did not smoke, 99% did not use any dust mask, 47% have diagnosed tuberculosis and 8% asthma. About 57, 48, 44 and 42 workers reported cough, phlegm, chest tightness and shortness of breath, respectively. The 89% workers were told by their physicians that dust exposure was the reason for their respiratory ailment.

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Section: Significance Of Occupational and Physical Factors For Prevalmentioning

confidence: 99%

Dust Generation and Respiratory Impact of Underground Coal-Producing mines in Pakistan

Ijaz

Akram

Ahmad

et al. 2020

Pol. J. Environ. Stud.

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“…Afterwards, we investigated the mechanical properties and morphology of these materials in order to identify the optimal quantities of carbide slag, fly ash, and other industrial waste components. We hope that this study will contribute to the preparation and promotion of high-quality inexpensive cementitious materials for mine filling [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 97%

Orthogonal Experimental Studies on Preparation of Mine‐Filling Materials from Carbide Slag, Granulated Blast‐Furnace Slag, Fly Ash, and Flue‐Gas Desulphurisation Gypsum

Zhang

et al. 2018

Advances in Materials Science and Engineering

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Environmentally friendly and cheap composite green cementitious materials have been prepared from carbide slag, fly ash, fluegas desulphurisation (FGD) gypsum, and granulated blast-furnace slag (GBFS) without using cement clinker. Orthogonal testing was used to investigate the effects of the raw materials on the amount of water required for reaching standard consistency and consistency, setting time, slump value, and strength of the produced materials after curing for 7 d and 28 d. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were used for the analysis of the sample microstructure and hydration products as well as for the exploration of possible hydration mechanisms. We found that, among the utilised raw materials, the addition of FGD gypsum had the most significant effect on the setting time and amount of water required for reaching standard consistency and consistency, while the addition of GBFS deeply affected the slump value. e optimal activation results were obtained when the mass ratio of carbide slag : fly ash : GBFS : FGD gypsum was equal to 12

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“…Micro CT is one of today's most popular and fastestgrowing types of computed tomography technology, and it is widely applied to the fields of micro and nano manufacturing, new materials and electronic science. In comparison with macrostructure CT for medical detection, micro CT has high resolution (as high as 0,5 ~ 1 μm) that enables measurement and analysis of the microstructure of small-sized materials and products [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Analysis of Water Injection Seepage Law in Micro Porous Structure of Coal

Zhou¹,

Qiu

Zhang

et al. 2020

Teh. vjesn

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In this paper, a nano Voxel X-ray 3D microscope is used to scan the long flame coal samples and to reconstruct the 3D pore structure by the use of microscopic computed tomography. With image segmentation technique, a model of micro-pore structure of coal is obtained from the reconstructed coal. With different planes selected as seepage inlets, a numerical simulation of low-pressure water seepage is conducted. Studies show that water pressure gradually decreases along the direction of water seepage and reaches the maximum at the pore-pipes with good connectivity near the inlet. Due to the difference between the structure and development direction of pores in the three dimensions, there is an optimal seepage outlet that is most appropriately corresponding to each seepage inlet. When different planes are selected as seepage inlets, the velocity of each seepage outlet is positively correlated with the seepage mass flow rate at the outlet.

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The diffusion behavior law of respirable dust at fully mechanized caving face in coal mine: CFD numerical simulation and engineering application

Cited by 209 publications

References 14 publications

Dust Generation and Respiratory Impact of Underground Coal-Producing mines in Pakistan

Dust Generation and Respiratory Impact of Underground Coal-Producing mines in Pakistan

Orthogonal Experimental Studies on Preparation of Mine‐Filling Materials from Carbide Slag, Granulated Blast‐Furnace Slag, Fly Ash, and Flue‐Gas Desulphurisation Gypsum

Numerical Simulation Analysis of Water Injection Seepage Law in Micro Porous Structure of Coal

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