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[1]刘浩杉,侯江,张智宇,等.复杂环境下隧道楔形掏槽合理延期时间优化研究*[J].中国安全生产科学技术,2023,19(8):116-123.[doi:10.11731/j.issn.1673-193x.2023.08.017]
　LIU Haoshan,HOU Jiang,ZHANG Zhiyu,et al.Study on optimization of reasonable delay time of tunnel wedge cut in complex environment[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(8):116-123.[doi:10.11731/j.issn.1673-193x.2023.08.017]
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复杂环境下隧道楔形掏槽合理延期时间优化研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年8期
页码:
116-123
栏目:
职业安全卫生管理与技术
出版日期:
2023-08-31

文章信息/Info

Title:
Study on optimization of reasonable delay time of tunnel wedge cut in complex environment
文章编号:
1673-193X(2023)-08-0116-08
作者:
刘浩杉1; 侯江2; 张智宇1; 黄永辉3; 赵文4
（1.昆明理工大学 国土资源工程学院，云南 昆明 650093；
2.云南省铁路集团有限公司﹐云南 昆明 650000；
3.昆明理工大学 电力工程学院，云南 昆明 650500；
4.贵州开源爆破工程有限公司﹐贵州 贵阳 551400)
Author(s):
LIU Haoshan1;  HOU Jiang2;  ZHANG Zhiyu1;  HUANG Yonghui3;  ZHAO Wen4
(1.Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;
2.Yunnan Railway Group Co.,Ltd.,Kunming Yunnan 650000,China;
3.Faculty of Electrical Power Engineering,Kunming University of Science and Technology,Kunming Yunnan 650500,China;
4.Guizhou Kaiyuan Blasting Engineering Co.,Ltd.,Guiyang Guizhou 551400,China)
关键词:
隧道掘进; 掏槽爆破; 延期时间; 数值模拟
Keywords:
tunnel excavation;  cut blasting;  delay time;  numerical simulation
分类号:
X947
DOI:
10.11731/j.issn.1673-193x.2023.08.017
文献标志码:
A
摘要:
为探究楔形掏槽不同延期起爆时间对地表振动影响规律，采用基于ANSYS/LS-DYNA的流固耦合算法对楔形掏槽爆破参数进行优化，分析掏槽孔微差爆破对掏槽区域破碎效果的影响与地表振速响应规律。研究结果表明：掏槽区域岩石爆破效果受延期时间影响较大且存在1个阈值，延期时间超过5 ms后自由面方向的掏槽区域内岩石破碎程度未贯通。同时，相较于同时起爆，隧道地表监测点在不同微差时间下降振率变化范围为14%~68%，变化速率呈先快后慢的趋势。而边墙与底板测点降振率受微差时间影响较小。在满足爆破效果的基础上，选择产生最小振动峰值的延期时间5 ms进行现场试验，现场实测峰值与数值模拟得出结果误差在10.32%，说明利用数值模拟的方法研究爆破振动是合理可行的。研究结果可为相关隧道掏槽孔爆破延期时间选择提供依据和参考。
Abstract:
To explore the influence of different delayed detonation time of wedge cut on the ground vibration,the fluid structure coupling algorithm based on ANSYS/LS-DYNA was adopted to optimize the wedge cut blasting parameters,and the influence of the millisecond blasting of cut hole on the crushing effect of cut area and the ground vibration velocity response law were analyzed.The results show that the blasting effect of rock in the cut area is greatly affected by the delay time and there is a threshold value.After the delay time exceeds 5 ms,the degree of rock fragmentation in the cut area in the free surface direction is not connected.At the same time,compared with simultaneous detonation,the vibration reduction rate of tunnel ground monitoring points decreases by 14%~68% in different microsecond time,showing a overall trend of fast first and then slow.However,the vibration reduction rate of side wall and floor measuring points are less affected by the millisecond time.On the basis of satisfying the blasting effect,the delay time of 5 ms that produces the minimum vibration peak value is selected for field test,and the error between the measured peak value and the numerical simulation result is 10.32%,which shows that the numerical simulation method is reasonable and feasible to study the blasting vibration.The research results can provide basis and reference for the selection of delay time of the relevant tunnel cut hole blasting.

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备注/Memo

备注/Memo:
收稿日期： 2022-09-29
* 基金项目： 国家自然科学基金项目（52164009）；云南省重大科技项目（202202AG050014）
作者简介： 刘浩杉，博士研究生，主要研究方向为爆破与冲击动力学。
通信作者： 黄永辉，博士，讲师，主要研究方向为爆炸力学与数值仿真。
更新日期/Last Update: 2023-09-07