The dust diffusion modeling and determination of optimal airflow rate for removing the dust generated during mine tunneling

被引：111

作者：

Guo, Lidian ^{[1
,2
,3
]}

Nie, Wen ^{[1
,2
,3
]}

Yin, Shuai ^{[2
,3
,4
]}

Liu, Qiang ^{[2
,3
,4
]}

Hua, Yun ^{[1
,2
,3
]}

Cheng, Lei ^{[2
,3
,4
]}

Cai, Xiaojiao ^{[1
,2
,3
]}

Xiu, Zihao ^{[1
,2
,3
]}

Du, Tao ^{[1
,2
,3
]}

机构：

[1] Shandong Univ Sci & Technol, Coll Safety & Environm Engn, Qingdao 266590, Shandong, Peoples R China

[2] Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China

[3] Shandong Univ Sci & Technol, Minist Sci & Technol, Qingdao 266590, Peoples R China

[4] Shandong Univ Sci & Technol, Coll Energy & Min Engn, Qingdao 266590, Shandong, Peoples R China

来源：

BUILDING AND ENVIRONMENT | 2020年 / 178卷

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

MECHANIZED MINING FACE; SEMIVOLATILE ORGANIC-COMPOUNDS; EXTERNAL SPRAYING SYSTEM; URBAN STREET CANYON; POLLUTANT DISPERSION; NUMERICAL-SIMULATION; VENTILATION SYSTEMS; SUPPRESSION DEVICE; TURBULENT-FLOW; COAL ROADWAY;

D O I：

10.1016/j.buildenv.2020.106846

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Dust pollution produced in tunneling process can seriously threaten safety in construction and the workers’ occupational health. Aiming at improving the construction environment in the tunnel, this study combined numerical simulation and field measurement for investigating temporal-spatial evolution laws of dust diffusion in the tunnel under single press-in ventilation condition. It was found that the airflow field in the tunnel can be divided into three segments, which were located 0~10 m, 10~45 m and 45~110 m from the working face, respectively. Accordingly, dust concentration exhibited three-zone distribution pattern after reaching the stability. In order to reduce dust concentration, dust removal performance was enhanced by increasing the pressing airflow rate of the air duct (denoted as Q) within a certain range. As Q increased to 600 m³/min, dust concentration was significantly reduced by 49.6% compared with the condition when Q = 200 m³/min. Dust removal performance tended to be stable with the further increase of Q. By taking into account sustainable utilization of energy, the optimal dust-removal pressure airflow rate was determined as Qoptimal = 600 m3/min. © 2020 Elsevier Ltd

引用

页数：17

共 103 条

[1] CFD modelling of the aerodynamic effect of trees on urban air pollution dispersion [J].