钻爆法施工深埋隧道喷雾降尘数值模拟研究

doi:10.16265/j.cnki.issn1003-3033.2024.11.1591

中国安全科学学报 ›› 2024, Vol. 34 ›› Issue (11): 66-72.doi: 10.16265/j.cnki.issn1003-3033.2024.11.1591

钻爆法施工深埋隧道喷雾降尘数值模拟研究

周玉竹¹^,²(), 魏丁一³^,^**(), 曹伟杰³, 卢增雄³, 林明磊¹, 杜小坤²

¹ 北京科技大学土木与资源工程学院,北京 100083
² 四川铸创安全科技有限公司,四川成都 610040
³ 河南工程学院资源与安全工程学院,河南郑州 451191

收稿日期:2024-07-12 修回日期:2024-09-14 出版日期:2024-11-28
通信作者:
** 魏丁一(1991—),男,河南禹州人,博士,讲师,主要从事职业健康安全方面的研究。E-mail:weidy103@126.com。
作者简介:
周玉竹 (1983—),女,四川绵竹人,博士研究生,正高级工程师,主要研究方向为职业健康安全。E-mail:93317462@qq.com。
杜小坤, 工程师。
基金资助:
国家卫生健康委粉尘危害工程防护重点实验室开放课题(KLECDH20230201); 河南省高等学校重点科研项目(23B440005); 河南工程学院博士培育基金(D2022021)

Numerical simulation study of affecting spraying and dust reduction in deeply buried tunnels constructed by drill-and-blast method

ZHOU Yuzhu¹^,²(), WEI Dingyi³^,^**(), CAO Weijie³, LU Zengxiong³, LIN Minglei¹, DU Xiaokun²

¹ School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
² Sichuan Zhuchuang Safety Technology Co., Ltd., Chengdu Sichuan 610040,China
³ School of Resource and Safety Engineering, Henan University of Engineering, Zhengzhou Henan 451191, China

Received:2024-07-12 Revised:2024-09-14 Published:2024-11-28

摘要/Abstract

摘要：

我国隧道建设工程发展迅猛,钻爆法施工隧道粉尘危害严重,为提高钻爆法施工隧道喷雾降尘效果,运用数值模拟方法,采用ANSYS软件建立隧道模型,研究不同围岩温度、喷射水流速度及喷嘴直径等因素条件下深埋隧道内粉尘质量浓度分布变化特征。结果表明:随着围岩温度的升高,粉尘运动更加剧烈,对降尘效率影响越大,雾滴对粉尘的捕捉效果随围岩温度的升高而逐渐降低;随着喷射水流速度的增大,喷射管道内水压增大,雾滴对粉尘捕捉效果越好;降尘效率随喷嘴直径的增大而降低,喷嘴直径过大时雾滴对颗粒物的捕捉能力会减弱,当喷嘴直径较小时会提高降尘效率,但喷嘴直径过小时,过多的飞溅水雾反而影响降尘效率。

关键词: 钻爆法施工, 深埋隧道, 喷雾降尘, 数值模拟, 围岩温度, 喷射水流速度, 喷嘴直径

Abstract:

Tunnel construction projects in China have developed rapidly, and significant dust hazards are associated with drilling and blasting construction. To improve the effectiveness of spraying to reduce dust in tunnels, this article uses digital simulation and a tunnel model was created using ANSYS. The variations in dust mass concentration distribution under different conditions, such as surrounding rock temperature, jet velocity, and nozzle diameter, were investigated in the study. The results show that as the surrounding rock temperature increases, dust movement becomes more intense, which significantly affects dust reduction efficiency. The dust capture effect of atomized water droplets decreases with the increase in surrounding rock temperature. With the increase of water jet velocity, the water pressure in the jet pipe increases, improving the dust capture effect of the droplets. Dust reduction efficiency decreases with increasing nozzle diameter. When the nozzle diameter is too large, the ability of water mist to capture particles weakens. Conversely, a smaller nozzle diameter improves dust reduction efficiency. However, if the nozzle diameter is too small, too much splash water spray rather than affect the efficiency of the dust.

Key words: drilling and blasting construction, deep buried tunnels, spraying to reduce dust, numerical simulation, surrounding rock temperature, jet velocity, nozzle diameter

中图分类号:

X964工业防尘

周玉竹, 魏丁一, 曹伟杰, 卢增雄, 林明磊, 杜小坤. 钻爆法施工深埋隧道喷雾降尘数值模拟研究[J]. 中国安全科学学报, 2024, 34(11): 66-72.

ZHOU Yuzhu, WEI Dingyi, CAO Weijie, LU Zengxiong, LIN Minglei, DU Xiaokun. Numerical simulation study of affecting spraying and dust reduction in deeply buried tunnels constructed by drill-and-blast method[J]. China Safety Science Journal, 2024, 34(11): 66-72.

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计算模型	模型设定
求解器	基于压力
能量方程	打开
湍流模型	k-ε模型
DPM	打开

DPM	模型设定
DPM迭代间隔	20
最大步数	50 000
虚拟质量力	打开
压力梯度力	打开
喷射源类型	面源
粒子类型	惰性
材料	灰质
质量流率/(kg·s^-1)	5.71
阻力特征	球形颗粒

边界条件	参数设定
水力直径/m	2.84
湍流强度/%	10
出口边界类型	流出
DPM条件	逃逸/反弹
壁面	无滑移

钻爆法施工深埋隧道喷雾降尘数值模拟研究

Numerical simulation study of affecting spraying and dust reduction in deeply buried tunnels constructed by drill-and-blast method

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参考文献 17

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工况	围岩温度t/ ℃	喷射水流速度 v/(m·s^-1)	喷嘴直径d/ mm
1	20	10	10
2	20	20	15
3	20	30	20
4	20	40	25
5	25	10	15
6	25	20	10
7	25	30	25
8	25	40	20
9	30	10	20
10	30	20	25
11	30	30	10
12	30	40	15

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工况	围岩温度t/ ℃	喷射水流速度 v/(m·s^-1)	喷嘴直径d/ mm
1	20	10	10
2	20	20	15
3	20	30	20
4	20	40	25
5	25	10	15
6	25	20	10
7	25	30	25
8	25	40	20
9	30	10	20
10	30	20	25
11	30	30	10
12	30	40	15

工况	围岩温度t/ ℃	喷射水流速度 v/(m·s^-1)	喷嘴直径d/ mm
1	20	10	10
2	20	20	15
3	20	30	20
4	20	40	25
5	25	10	15
6	25	20	10
7	25	30	25
8	25	40	20
9	30	10	20
10	30	20	25
11	30	30	10
12	30	40	15