地铁车站二氧化碳相变致裂法施工的动力响应分析*
王莉1,2张力2孙礼超3殷小桃3张壮3
Dynamic Response Analysis of CO2 Phase Change Fracturing Method Construction at Metro Station
WANG LiZHANG LiSUN LichaoYIN XiaotaoZHANG Zhuang
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作者信息:1.中电建路桥集团有限公司，100048，北京；
2.北京科技大学金属矿山高效开采与安全教育部重点实验室，100083，北京；
3.乌鲁木齐城市轨道集团有限公司，830026，乌鲁木齐
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Affiliation:Power China Roadbridge Construction Group Co.,Ltd.,100048,Beijing,China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2019.06.021
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中图分类号/CLCN:TU751.9
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栏目/Col:研究报告
摘要:
以乌鲁木齐地铁1号线王家梁车站小导洞 CO2 相变致裂法施工为工程背景，研究 CO2 致裂技术原理。计算得出压力为270MPa的CO2致裂器致裂产生的能量与277gTNT 所具有的能量相当。使用 LS-DYNA 软件对转化为 TNT 当量的 CO2 致裂爆破进行数值模拟，对地表 BRT（快速公交）车站和浅埋排水管两处风险源进行安全分析。研究表明：各监测点振动速度达到峰值的时间与应力波传递时间一致；爆破的振动影响随着离爆源的距离逐渐增加而逐渐减小，模拟和实测振动速度均在安全范围以内。 将 CO2 致裂能转化为 TNT 当量进行模拟计算的方法合理可行。
Abstracts:
Based on the engineering background of Wangjialiang Station on Urumqi metro line 1 that adopts the carbon dioxide（CO2） phase change fracturing method in construction，the principle of CO2 fracturing technology is studied. Calculation result shows that the energy produced by 270 MPa CO2 fracturing device is comparable to 277 g TNT. Then, the numerical simulation of CO2 fracture blasting that is converted into TNT equivalent is performed by LS-DYNA software，the data obtained are used for the monitoring and analysis of two risk sources：surface BRT station and shallow drainage pipe. This research shows that the time when vibration velocity of the monitoring points near BRT station reaches the peak value in agreement with that of the stress wave transmission. When the distance from the detonation source increases，the vibration effect of blasting will gradually decrease，and the simulated and actual monitored velocity data are within safety limits. It is reasonable and feasible to convert CO2 fracturing energy into TNT equivalent.
引文 / Ref:
王莉，张力，孙礼超，等.地铁车站二氧化碳相变致裂法施工的动力响应分析[J].城市轨道交通研究，2019，22(06):94.
WANG Li，ZHANG Li，SUN Lichao，et al.Dynamic response analysis of CO2 phase change fracturing method construction at metro station[J].Urban Mass Transit，2019，22(06)：94.
WANG Li，ZHANG Li，SUN Lichao，et al.Dynamic response analysis of CO2 phase change fracturing method construction at metro station[J].Urban Mass Transit，2019，22(06)：94.
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