The aerosolized dust produced during coal mining operations pollutes underground air environment and increases the risk of lung diseases in coal miners, such as pneumoconiosis. Aiming to solve the dust pollution in mechanized excavation face, the integrated vortex ventilation and dust removal system is designed based on swirling jet flow theory. The design principles and technological parameters of the major components of integrated vortex ventilation and dust removal (IVVDR) system, namely vortex ventilation device and wet dust collector are described systematically. Through numerical simulation and field experiments, the dust control and dust removal effects of IVVDR system were analyzed and tested. The numerical simulation results show that the swirling jet flows produced by wall-attached duct can control most of total and respirable dust in the area between working face and exhausting air outlet. In addition, the IVVDR system provides better control and removal effect of smaller respirable dust. In field application, the IVVDR system has better performance compared with the long-compression short-suction (LCSS) ventilation. In conclusion, the concentration of total and respirable dust in purified air are below 10 mg/m3, and in accordance with the mine safety regulations.
ZhandDLuoB.Statistics and prospect of occupational diseases of mine in China. China Energy Environ Prot2017;
39: 6.
2.
LiuJZhangRSongD, et al.Experimental investigation on occurrence of gassy coal extrusion in coalmine. Saf Sci2019;
113: 362–371.
3.
SaZLiuJLiuJ, et al.
Research on effect of gas pressure in the development process of gassy coal extrusion. Saf Sci2019;
115: 28–35.
4.
Geng F, Zhou F and Luo G. Research status and method progress if dust prevention and control technology for fully mechanized heading face in coal mine. Min Saf Environ Prot 2014; 41: 5.
5.
Lu X, Zhu H and Wang DM. Investigation on the new design of foaming device used for dust suppression in underground coal mines. Powder Technol 2017; 315: 270--275.
6.
Kollipara VK, Chugh YP and Mondal K. Physical, mineralogical and wetting characteristics of dusts from Interior Basin coal mines. Int J Coal Geol 2014; 127: 75--87.
7.
Ross MH and Murray J. Occupational respiratory disease in mining. Occupational Medicine 2004; 54: 304--310.
8.
SAWS. The 13th Five-Year Plan of occupational2017. China: Ministry of Emergency Management of the People’s Republic of China.
9.
AyogluFNAcikgozBTutkunE, et al. Descriptive characteristics of coal workers’ pneumoconiosis cases in Turkey. Iranian J Public Health2014; 43: 389–390.
10.
ZoskyGRHoyRFSilverstoneEJ, et al. Coal workers’ pneumoconiosis: an Australian perspective. Med J Australia 2016;
204: 414.
11.
HanLGaoQYangJ, et al. Survival analysis of coal workers’ pneumoconiosis (CWP) patients in a state-owned mine in the east of China from 1963 to 2014. Inter J Environ Res Public Health2017; 14: 489.
12.
QianJLiuZLiuH, et al.
Characterization of the products of explosions of varying concentrations of coal dust. Combust Sci Technol2019;
191: 1236–1220.
13.
WenNXiaoMChengW, et al. A novel spraying/negative-pressure secondary dust suppression device used in fully mechanized mining face: A case study. Process Saf Enviro Prot2016;
103: 126–35.
14.
RenWShiJGuoQ, et al.
The influence of dust particles on the stability of foam used as dust control in underground coal mines. Process Saf Environ Protect2017;
111: 740–746.
15.
Cheng W, Nie W, Zhou G, et al. Research and practice on fluctuation water injection technology at low permeability coal seam. Saf Sci 2012; 50: 851--856.
16.
Faschingleitner J and Höflinger W. Evaluation of primary and secondary fugitive dust suppression methods using enclosed water spraying systems at bulk solids handling. Adv Powder Technol 2011; 22: 236--244.
17.
Conroy MW, Taylor JC, Farley JP, et al. Liquid drainage from high-expansion (HiEx) aqueous foams during and after filling of a container. Colloids Surf A 2013; 426: 70--97.
18.
Prostański D. Use of air-and-water spraying systems for improving dust control in mines. J Sustainable Min 2013; 12: 29--34.
19.
Wang H, Jiang Z, Huang L, et al. Experimental research on pressing air-absorption air volume ratio in FPNA ventilation for excavation roadways. J Liaoning Technical Univer 2011; 38: 11701--11707.
20.
Ren W, Wang D, Guo Q, et al. Application of foam technology for dust control in underground coal mine. Inter J Mining Sci Technol 2014; 24: 13--16.
21.
Xu G, Chen Y, Eksteen J, et al. Surfactant-aided coal dust suppression: a review of evaluation methods and influencing factors. Sci Total Environ 2018; 639: 1060.
22.
Xi Z, Jin L, Liew JYR, et al. Characteristics of foam sol clay for controlling coal dust. Powder Technol 2018; 335: 401--408.
23.
Liu Y, Wen N, Mu Y, et al. A synthesis and performance evaluation of a highly efficient ecological dust depressor based on the sodium lignosulfonate -acrylic acid graft copolymer. RSC Adv 2018; 8: 11498--11508.
24.
Cheng WM, Nie W, Pan G, et al. Materials. Study and prevention on the diffusion rule of dust pollution in the coal mine whole-rock fully mechanized workface. Appl Mech Mater 2013; 246--247: 608--613.
25.
Zhang H, Wen N, Liu Y, et al. Synthesis and performance measurement of environment-friendly solidified dust suppressant for open pit coalmine. J Appl Polym Sci 2017; 135: 46505.
26.
NieWWeiWMaX, et al.
The effects of ventilation parameters on the migration behaviors of head-on dusts in the heading face. Tunnelling Underground Space Technol2017;
70: 400–408.
27.
HuaYNieWCaiP, et al.
Pattern characterization concerning spatial and temporal evolution of dust pollution associated with two typical ventilation methods at fully mechanized excavation faces in rock tunnels. Powder Technol2018;
334: 117–131.
28.
GengFLuoGWangY, et al.
Dust dispersion in a coal roadway driven by a hybrid ventilation system: a numerical study. Process Saf Environ Prot2018;
113: 388–400.
29.
NieWLiuYChengWM, et al.
Simulation experiment on multi-direction whirling air curtain preventing dust diffusion. J Central South Univ (Sci Technol)2016;
47: 9.
30.
ZhangXCaoSLiD.Study of intergrated dust control and dust removal technology based on wall-attached jet theory. J China Univ Mining Technol2019;
48: 8.
31.
ChangPXuGZhouF, et al.
Minimizing DPM pollution in an underground mine by optimizing auxiliary ventilation systems using CFD. Tunnelling Underground Space Technol2019;
87: 112–121.
32.
LiuYZhouLXXuCX. Large-eddy simulation of swirling gas-particle flows using a USM two-phase SGS stress model. Powder Technol 2010; 198: 183–188.
33.
NazifHRTabriziH. Development of boundary transfer method in simulation of gas–solid turbulent flow of a riser. Appl Mathematical Modell2013; 37: 2445–2559.
