高海拔地区某施工隧道爆破后变风量下的CO扩散规律

doi:10.3973/j.issn.2096-4498.2025.S2.010

隧道建设（中英文） ›› 2025, Vol. 45 ›› Issue (S2): 115-124.DOI: 10.3973/j.issn.2096-4498.2025.S2.010

高海拔地区某施工隧道爆破后变风量下的CO扩散规律

尹龙¹，夏文洁²，王继红^{2, *}，蒋爽³，王树刚²，吴元金¹，罗占夫¹，刘祺君⁴

（1. 中铁隧道局集团（上海）特种高新技术有限公司, 上海 201306； 2. 大连理工大学建设工程学院，辽宁大连 116024； 3. 大连民族大学土木工程学院，辽宁大连 116600; 4. 广弘科技（大连）有限公司, 辽宁大连 116084）

出版日期:2025-12-20 发布日期:2025-12-20
作者简介:尹龙(1980—)，男，黑龙江双城人，2004年毕业于兰州交通大学，建筑环境与设备工程专业，本科，正高级工程师，现从事隧道与地下工程工作。 E-mail： 25726444@qq.com。*通信作者：王继红， E-mail： wangjihong@dlut.edu.cn。

CO Diffusion Pattern After Blasting in a High-Altitude Construction Tunnel Under Varying Ventilation Rates

YIN Long¹, XIA Wenjie², WANG Jihong^{2, *}, JIANG Shuang³, WANG Shugang², WU Yuanjin¹, LUO Zhanfu¹, LIU Qijun⁴#br#

(1. China Railway Tunnel Group (Shanghai) Special High-tech Co., Ltd., Shanghai 201306, China; 2. School of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China; 3. College of Civil Engineering, Dalian Minzu University, Dalian 116600, Liaoning, China; 4. Guanghong Technology Co., Ltd., Dalian 116084, Liaoning, China)

Online:2025-12-20 Published:2025-12-20

摘要/Abstract

摘要： 为明确施工隧道变风量通风条件下高海拔等关键因素对CO运移的影响机制，准确掌握掌子面爆破后CO的体积分数分布规律，以海拔3 500 m地区采用压入式通风的施工隧道为研究对象，基于现场实测数据，构建三维非稳态通风数值模型，并运用专业数值模拟软件对不同工况条件下CO动态运移及时空演化特征进行分析；同时，引入灰色关联法，定量解析CO体积分数降低至暴露限值所需要的时间与各影响因素间的关联程度。研究结果表明： 1）在爆破后的通风过程中，隧道内截面CO体积分数峰值迁移的距离与通风时间满足二次函数关系。2）通过对比不同工况下隧道内CO时空分布特征可知，海拔越低、炸药用量越少、风管末端与掌子面距离越近、风管悬挂高度越高，CO体积分数降低至暴露限值所需的通风时间越短。3）在各影响因素中，炸药用量与风管末端与掌子面的距离对CO体积分数降至暴露限值所需时间的影响最为显著，灰色关联度分别达0.77和0.76；海拔次之，灰色关联度为0.68；风管悬挂高度的影响相对较小，灰色关联度为0.49。

关键词: 高海拔隧道, 爆破, 变风量, CO, 时空演化, 灰色关联法

Abstract: It is of great significance to clarify the influence mechanism of key factors such as high altitude on CO migration under variable air volume ventilation in construction tunnels and accurately determine the concentration distribution of CO after tunnel face blasting. In this study, a case study is conducted on a construction tunnel with press-in ventilation at an altitude of 3 500 m, and a three-dimensional unsteady ventilation numerical model based on field measurement data is constructed. Professional numerical simulation software is utilized to analyze the dynamic migration and spatiotemporal evolution characteristics of CO under different working conditions. Further, the grey relation analysis method is employed to quantitatively analyze the correlation degree between the time required for CO concentration to decrease to the exposure limit and each influencing factor. The results show the following: (1) During the ventilation process after blasting, the migration distance of the CO peak value section in the tunnel satisfies a quadratic function relationship with ventilation time. (2) By comparing the spatiotemporal distribution characteristics of CO in the tunnel under different working conditions, it is found that the lower the altitude, the smaller the amount of explosives used, the closer the end of the air duct to the tunnel face, and the higher the hanging position of the air duct, the shorter the 〖JP2〗ventilation time required for the CO concentration to decrease to the exposure limit. (3) The grey relation analysis results show that among the influencing factors, the amount of explosives and the distance from the end of the air duct to the tunnel face exhibit the most remarkable influence on the time required for CO concentration to drop to the exposure limit, with grey relation degree coefficients of 0.77 and 0.76, respectively; the altitude comes next with a correlation coefficient of 0.68; and the influence of the air duct hanging position is relatively limited, with a correlation coefficient of 0.49.

Key words: high altitude tunnel, blasting, variable ventilation rate, carbon monoxide, spatiotemporal evolution, grey relation analysis

尹龙, 夏文洁, 王继红, 蒋爽, 王树刚, 吴元金, 罗占夫, 刘祺君. 高海拔地区某施工隧道爆破后变风量下的CO扩散规律[J]. 隧道建设, 2025, 45(S2): 115-124.

YIN Long, XIA Wenjie, WANG Jihong, JIANG Shuang, WANG Shugang, WU Yuanjin, LUO Zhanfu, LIU Qijun. CO Diffusion Pattern After Blasting in a High-Altitude Construction Tunnel Under Varying Ventilation Rates[J]. Tunnel Construction, 2025, 45(S2): 115-124.

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高海拔地区某施工隧道爆破后变风量下的CO扩散规律

CO Diffusion Pattern After Blasting in a High-Altitude Construction Tunnel Under Varying Ventilation Rates

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