Gold Science and Technology
img

Wechat

Adv. Search
Online Submission Peer Review Office Work

Gold Science and Technology ›› 2021, Vol. 29 ›› Issue (5): 698-708.doi: 10.11872/j.issn.1005-2518.2021.05.042

• Mining Technology and Mine Management • Previous Articles     Next Articles

Numerical Simulation of Sectional Oxygen⁃Enrichment Ventilation in Plateau Mine

Hongwei DENG1,2(),Zhiming ZHONG1,2,Guanglin TIAN1,2   

  1. 1.School of Resources and Safety Engineering，Central South University，Changsha 410083，Hunan，China
    2.High-altitude Cold Area Mining Engineering Technology Research Center of Central South University，Changsha 410083，Hunan，China
  • Received:2021-03-18 Revised:2021-05-11 Online:2021-10-31 Published:2021-12-17

RichHTML

2

PDF (PC)

273

Abstract:

Aiming at the problems of low oxygen enrichment efficiency and serious waste of oxygen resources in the traditional diffusion oxygen-enrichment ventilation scheme of mechanized tunneling roadway in plateau mine，a new type of sectional oxygen-enrichment ventilation scheme was proposed. Based on the ANSYS-Fluent numerical simulation software，a comparison test was designed for the tunneling roadway of a metal mine at an altitude of 4 000 m，its goal is to increase the oxygen concentration in the aerobic area of the tunneling roadway to 26%. The differences of oxygen enrichment diffusion and oxygen spatial distribution between traditional diffusion oxygen-enrichment ventilation scheme and the sectional oxygen-enrichment ventilation scheme were analyzed. In order to evaluate the oxygen enrichment capacity of sectional oxygen-enrichment ventilation and traditional diffusion oxygen-enrichment ventilation，two indexes of target oxygen enrichment deviation and oxygen-enrichment transport efficiency were introduced. The results were as follows：Firstly，compared with the traditional diffusion oxygen-enrichment ventilation，the sectional oxygen-enrichment ventilation transferred the oxygen-enriched focus from the front area of the roadway without oxygen enriched demand to the middle and rear area of the roadway with higher oxygen-enriched demand. The oxygen enriched time was reduced from more than 5 min to 3 min，the oxygen concentration in the aerobic zone of the middle and end section of the roadway were increased from 22.1% and 24.3% to 24.6% and 25.5%，the oxygen enriched diffusion rate and diffusion range were elevated significantly，the defects of traditional diffusion oxygen-enrichment ventilation，such as slow diffusion of oxygen enrichment，narrow range of oxygen enri-chment and insufficient oxygen enrichment in the middle and rear sections of roadway were all improved. Secondly，the oxygen spatial distribution in the middle and back section of the segmented oxygen-enrichment ventilation roadway was uniform，which solved the problems of large oxygen concentration difference between the left and right sides in the middle section in the traditional diffusion oxygen-enrichment ventilation method’s roadway，and none-oxygen spatial distribution in one side of the pressure air duct in the back section of the roadway.Thirdly，the oxygen enrichment time of heading machine driver’s breathing belt was reduced from 255 s to 177 s，and the oxygen concentration increased from 22.51% to 25.24%.The oxygen enrichment rate and oxygen enrichment concentration of heading machine driver’s breathing zone were significantly improved，which provided a cleaner breathing environment for heading machine driver and ensured the smooth progress of tunneling operation. Finally，compared with the traditional diffusion oxygen-enrichment ventilation scheme，the target oxygen enrichment offset of sectional oxygen-enrichment ventilation was reduced from 4.385 to 1.372，and the oxygen utilization rate was increased from less than 5% to about 50%，which fully verified the oxygen enrichment effectiveness and superiority of sectional oxygen-enrichment ventilation scheme，and the study has certain guiding significance for the development of mechanized tunneling ventilation mode in plateau mine.

Key words: plateau mine, sectional oxygen-enrichment ventilation, numerical simulation, target oxygen enrichment offset, oxygen-enrichment transport efficiency

CLC Number: 

  • TD724

Fig.1

Schematic diagram of sectional oxygen-enrichment ventilation system"

Fig.2

Schematic diagram of 3D model and cross-section of tunneling roadway"

Table 1

Boundary conditions and parameter setting of sec?tional oxygen?enrichment ventilation numerical simulation"

通风方案模型边界边界类型边界参数
分段式增氧通风压风筒口速度入口10 m/s
排风筒口速度出口8 m/s
巷道出口压力出口0 Pa
富氧扩散出口流量入口0.45 m3/s
附壁风筒径向出口速度入口9.89 m/s

Fig.3

Schematic diagram of tunneling roadway division"

Fig.4

Cloud diagram of oxygen?enrichment diffusion in roadway at different time and different oxygen?enrichment ventilation schemes"

Fig. 5

Cloud diagram of oxygen concentration distribution of roadway section under different oxygen-enrichment ventilation schemes"

Fig.6

Oxygen enrichment process of roadheader driver under different oxygen enrichment ventilation schemes"

Fig.7

Schematic diagram of measuring points arrangement scheme（segmented oxygen-enrichment ventilation）"

Table 2

Oxygen-enrichment transportation efficiency of two ventilation schemes"

通风方案呼吸带富氧输运效率/%
分段式增氧通风常规作业人员呼吸带53.8
掘进机驾驶员呼吸带47.9
传统扩散式增氧通风常规作业人员呼吸带2.27
掘进机驾驶员呼吸带2.35
Cao Zhengmao，Yang Qixin，Guo Chun，2016.Migration characteristics of poisonous gas during construction stage in railway tunnels at high altitude areas［J］.Journal of Central South University （Science and Technology），47（11）：3948-3957.
Caravita S，Faini A，Bilo G，al et，2014.Ischemic changes in exercise ECG in a hypertensive subject acutely exposed to high altitude.Possible role of a high-altitude induced imbalance in myocardial oxygen supply-demand［J］.International Journal of Cardiology，171（3）：e100-e102.
Fagenholz P J，Murray A F，Gutman J A，al et，2007.New-onset anxiety disorders at high altitude［J］.Wilderness & Enviro-nmental Medicine，18（4）：312-316.
Geng F，Luo G，Wang Y，al et，2018.Dust dispersion in a coal roadway driven by a hybrid ventilation system：A numerical study［J］.Process Safety and Environmental Protection，113：388-400.
Gong jian，2015.Research on the Movement Regularities of Dust and Ventilation System Optimization in Excavation Face of High-altitude Mine［D］.Beijing：University of Science and Technology Beijing.
Gui C，Geng F，Tang J，al et，2020.Gas-solid two-phase flow in an underground mine with an optimized air-curtain system：A numerical study［J］.Process Safety and Environmental Pro-tection，140：137-150.
Jakob M，Liebers F，Behrendt S，2012.The effects of working height and manipulated weights on subjective strain，body posture and muscular activity of milking parlor operatives—Laboratory study［J］.Applied Ergonomics，43（4）：753-761.
Khalid W，Zaki S A，Rijal H B，al et，2019.Investigation of comfort temperature and thermal adaptation for patients and visitors in Malaysian hospitals［J］.Energy and Buildings，183：484-499.
Król A，Król M，Koper P，al et，2019.Numerical modeling of air velocity distribution in a road tunnel with a longitudinal ventilation system［J］.Tunnelling and Underground Space Technology，91：103003.
Lai T，Gao R，Li H，al et，2020.Air distribution of oxygen supply through guardrail slot diffusers in high-altitude hypoxic areas［J］.Building and Environment，179：106852.
Li Rongrong，Li Zijun，Huang Yilong，al et，2020.Ventilation mode optimization of mining face at high altitude based on ANP［J］.Gold Science and Technology，28（2）：301-308.
Li Zijun，Huang Yilong，2020.Numerical simulated research for the oxygen-supply and ventilation in a driving working face of the high-elevated mine［J］.Journal of Safety and Environment，20（6）：2147-2153.
Luks A M，Auerbach P S，Freer L，al et，2019.Wilderness medical society clinical practice guidelines for the prevention and treatment of acute altitude illness：2019 update［J］.Wilderness & Environmental Medicine，30（4）：S3-S18.
Sakamoto R，Okumiya K，Norboo T，al et，2017.Sleep quality among elderly high-altitude dwellers in Ladakh［J］.Psychiatry Research，249：51-57.
Storz J F，Cheviron Z A，2021.Physiological genomics of adaptation to high-altitude hypoxia［J］.Annual Review of Animal Biosciences，9：149-171.
Sun L，Ding M，Cai T，al et，2017.Using a new plateau hyperbaric chamber to alleviate high altitude hypoxia：Rabbit and human studies［J］.The American Journal of Emergency Me-dicine，35（10）：1536-1541.
Wang Haoyu，Liu Yingshu，Zhang Chuanzhao，al et，2019.Simulation of oxygen enrichment characteristics and effect in hypoxia air-conditioning room［J］.Chinese Journal of Engineering，41（8）：1061-1073.
Wang K，Jiang S，Wu Z，al et，2017.Intelligent safety adjustment of branch airflow volume during ventilation-on-demand changes in coal mines［J］.Process Safety and Environmental Protection，111：491-506.
Wang M，Yan G，Yu L，al et，2019.Effects of different artificial oxygen-supply systems on migrants’ physical and psychological reactions in high-altitude tunnel construction［J］.Building and Environment，149：458-467.
Wang P，Li Y，Liu R，al et，2019.Effects of forced-to-exhaust ratio of air volume on dust control of wall-attached swirling ventilation for mechanized excavation face［J］.Tunnelling and Underground Space Technology，90：194-207.
Xie Wenqiang，2015.Research on Oxygen Supply Criterion and Design Method in the Construction of Balang High-altitude Tunnel［D］.Chengdu：Southwest Jiaotong University.
Yang Xiong，Liu Yingshu，Shen Min，al et，2009.Maximum safe concentration of oxygen-enriched atmosphere in high altitude［J］.Journal of University of Science and Technology Beijing，31（11）：1467-1471.
Zhou B，Li M，Cao X，al et，2016.Phenylethanoid glycosides of pedicularis muscicola maxim ameliorate high altitude-induced memory impairment［J］.Physiology & Behavior，157：39-46.
Zubieta-calleja G，Zubiera-deurioste N，2021.Acute mountain sickness，high altitude pulmonary edema，and high altitude cerebral edema：A view from the high Andes［J］.Respiratory Physiology & Neurobiology，287：103628.
曹正卯，杨其新，郭春，2016.高海拔地区铁路隧道施工期有害气体运移特性［J］.中南大学学报（自然科学版），47（11）：3948-3957.
龚剑，2015.高海拔矿山掘进面粉尘运移规律及通风除尘系统优化［D］.北京：北京科技大学.
李蓉蓉，李孜军，黄义龙，等，2020.基于ANP的高海拔矿山掘进工作面通风方式优选［J］.黄金科学技术，28（2）：301-308.
李孜军，黄义龙，2020.高海拔矿山掘进工作面供氧通风数值模拟［J］.安全与环境学报，20（6）：2147-2153.
王浩宇，刘应书，张传钊，等，2019.缺氧空调房间富氧特性及富氧效果的模拟研究［J］.工程科学学报，41（8）：1061-1073.
谢文强，2015.巴朗山高海拔隧道施工期供氧标准及设计方法研究［D］.成都：西南交通大学.
杨雄，刘应书，沈民，等，2009.高原低气压环境室内富氧的安全氧气体积分数上限［J］.北京科技大学学报，31（11）：1467-1471.
[1] Jingkai JIA,Gun HUANG,Long WANG,Qiang CHENG,Libing ZHEN. Study on a New Method of Weakening End Effect in Uniaxial Compression Test [J]. Gold Science and Technology, 2021, 29(3): 382-391.
[2] Jin HUANG,Kewei LIU,Shaohu JIN. Numerical Simulation Study of High-strength Projectile Penetrating White Granite Target [J]. Gold Science and Technology, 2021, 29(3): 411-420.
[3] Lulu XU,Qinli ZHANG,Ru FENG. Numerical Simulation of Backfill Strength Based on Optimization Results of Stope Structural Parameters [J]. Gold Science and Technology, 2021, 29(3): 421-432.
[4] Xuebin XIE,Shan GAO,Jiang GUO,Yongfei YE. Numerical Simulation Study on the Response Law of Pressure Arch Height of Deep-buried Tunnel Under Seismic Dynamic Load [J]. Gold Science and Technology, 2021, 29(2): 226-235.
[5] Weihua WANG,Jie LUO,Tian LIU,Zhenyu HAN. Particle Flow Simulation on Influence of Joint Roughness Coefficient on Stress Wave Propagation and Specimens Failure [J]. Gold Science and Technology, 2021, 29(2): 208-217.
[6] Peng JIN,Kewei LIU,Xudong LI,Jiacai YANG. Numerical Simulation Study of Crack Propagation in Deep Rock Mass Under Water-coupling Blasting [J]. Gold Science and Technology, 2021, 29(1): 108-119.
[7] Jianhua HU,Le PANG,Xueliang WANG,Minghua ZHENG. Optimization of Roadway Support Parameters in Soft Broken Sections Based on Orthogonal Test [J]. Gold Science and Technology, 2020, 28(6): 859-867.
[8] Chenglong WANG,Chenglu HOU,Shanghuan YANG,Xingdong ZHAO. Control Technology of High Stress Broken Surrounding Rock in Kilometer Deep Shaft [J]. Gold Science and Technology, 2020, 28(6): 885-893.
[9] Lipeng WANG,Fang YAN,Zijun LI,Fang WANG. Dynamic Status Evaluation of Main Fans of Mine at High Altitude Region [J]. Gold Science and Technology, 2020, 28(6): 930-939.
[10] Zeyou LI, Rui HUANG, Shuqi ZHAO, Xue SHEN, E WU. Ventilation Method Optimization of Dust Extraction in an Excavation Roadway of High-altitude Mine [J]. Gold Science and Technology, 2020, 28(5): 743-752.
[11] Huaibin SU, Qinli ZHANG, Deming ZHANG, Changgen ZENG, Xiaojiang ZHU. Study on the Optimization of Stope Structure Parameters in the Large-scale Backfilling Mining of Rangjialong Silver Mine [J]. Gold Science and Technology, 2020, 28(4): 550-557.
[12] Zhien HUANG, Ming LI, Guoli LIAO, Chao WU, Rui HUANG, Zijun LI. Analysis of Human Fatigue and Error Rates in Plateau Mines Based on HFACS [J]. Gold Science and Technology, 2020, 28(4): 610-618.
[13] Guicheng HE, Kexu CHEN, Bing DAI, Chengcheng WANG. Experimental Study and Numerical Simulation Analysis of Crack Propagation Characteristics of Crisscross Fracture [J]. Gold Science and Technology, 2020, 28(4): 509-520.
[14] Yongyuan KOU, Guang LI, Long ZOU, Fengshan MA, Jie GUO. Study on Mining Method of Horizontal Pillar in the Middle Section of +1 000 m in Jinchuan No.2 Mining Area [J]. Gold Science and Technology, 2020, 28(3): 353-362.
[15] Shibo YU, Xiaocong YANG, Ye YUAN, Zhixiu WANG. Research on Destress Effect of Ground Pressure Control for the Time-space Mining Sequence at Depths [J]. Gold Science and Technology, 2020, 28(3): 345-352.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!

©2018 Gold Science and Technology　

Telephone：0931-8277791　

E-mail: hjkx@lzb.ac.cn Postcode：730000　

Powered by Beijing Magtech Co. Ltd

陇ICP备17001318号-1