液态CO_2相变破岩技术在地铁基坑开挖中的应用
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摘要
针对硬岩地质的地铁基坑开挖工程,传统的炸药破岩技术存在着炸药审批困难、储存运输风险高和爆破能量难以控制等问题。为解决上述问题,以长沙某地铁基坑开挖工程为背景,运用液态CO_2相变破岩技术替代传统炸药爆破进行破岩开挖,并对其破岩效果和安全性进行分析与监测。研究结果表明:液态CO_2相变破岩技术在破岩效果上能替代传统炸药爆破的方式,在安全性上符合爆破安全规程规定,可在类似硬质岩体的开挖工程中推广使用。
In the subway excavation project of hard rock geology, the traditional explosive breaking technology has the problems such as the difficulty of the examination and approval, the high storage and transportation risk, and the difficult control of blasting energy and so on. Aimed at the above problems, the Changsha subway excavation project as the background, the liquid CO_2 phase change rock breaking technology was used to replace the traditional blasting for rock excavation, rock breaking efficiency and safety were analyzed and monitored. The results show that the liquid CO_2 phase change rock breaking technology can replace the traditional explosive blasting method in rock breaking efficiency, comply with safety regulations for blasting in safety, and can be used in similar hard rock excavation engineering application.
In the subway excavation project of hard rock geology, the traditional explosive breaking technology has the problems such as the difficulty of the examination and approval, the high storage and transportation risk, and the difficult control of blasting energy and so on. Aimed at the above problems, the Changsha subway excavation project as the background, the liquid CO_2 phase change rock breaking technology was used to replace the traditional blasting for rock excavation, rock breaking efficiency and safety were analyzed and monitored. The results show that the liquid CO_2 phase change rock breaking technology can replace the traditional explosive blasting method in rock breaking efficiency, comply with safety regulations for blasting in safety, and can be used in similar hard rock excavation engineering application.
引文
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[15]胡建华,尚俊龙,罗先伟,等.单孔爆破振动监测与衰减规律多元线性化回归[J].振动与冲击,2013,32(16):49-53.HU Jianhua,SHANG Junlong,LUO Xianwei,et al.Monitoring of single-hole blasting vibration and detection of its attenuation law by using multiple linear regression[J].Journal of Vibration and Shock,2013,32(16):49-53.
[2]丁雄,阳生权,林平,等.轻轨隧道开挖引起的爆破振动特性分析[J].铁道科学与工程学报,2015,12(3):591-593.DING Xiong,YANG Shengquan,LIN Ping,et al.Analysis of the blasting vibration characteristics during light rail tunnelling[J].Journal of Railway Science and Engineering,2015,12(3):591-593.
[3]蒋楠,周传波,罗钢,等.铁路隧道混凝土衬砌爆破振动安全判据[J].中南大学学报(自然科学版),2012,43(7):2747-2750.JIANG Nan,ZHOU Chuanbo,LUO Gang,et al.Blasting vibration safety criterion of railway tunnel concrete lining.[J].Journel of Central South University(Science and Technology),2012,43(7):2747-2750.
[4]Singh S.Non-explosive applications of the PCF concept for underground excavation[J].Tunnelling Methods,1998,3(13):305-311.
[5]徐颖.高压气体爆破采煤技术的发展及其在我国的应用[J].爆破,1998,15(1):67-69.XU Yin.Development of coal mining technology in high pressure gas blasting and its application in China[J].Blasting,1998,15(1):67-69.
[6]周西华,门金龙,宋东平,等.液态CO2爆破煤层增透最优钻孔参数研究[J].岩石力学与工程学报,2016,35(3):524-529.ZHOU Xihua,MEN Jinlong,SONG Dongping,et al.Research on optimal borehole parameters of antireflection in coal seam by liquid CO2 blasting[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(3):524-529.
[7]周西华,门金龙,宋东平,等.煤层液态CO2爆破增透促抽瓦斯技术研究[J].中国安全科学学报,2015,25(2):60-65.ZHOU Xihua,MEN Jinlong,SONG Dongping,et al.Research on increasing coal seam permeability and promoting gas drainage with liquid CO2 blasting[J].China Safety Science Journal,2015,25(2):60-65.
[8]朱拴成,周海丰,李浩荡.二氧化碳炮处理综采工作面巷道三角区悬顶[J].煤矿安全,2013,44(8):144-146.ZHU Shuancheng,ZHOU Haifeng,LI Haodang.The application of carbon dioxide gun in processing hanging arch at triangle area of fully mechanized mining face roadway[J].Safety in Coal Mines,2013,44(8):144-146.
[9]郭志兴.液态二氧化碳爆破筒及现场试爆[J].爆破.1994,11(3):72-74.GUO Zhixing.Liquid carbon dioxide blasting tube and field test blasting[J].Blasting,1994,11(3):72-74.
[10]董庆祥,王兆丰,韩亚北,等.液态CO2相变致裂的TNT当量研究[J].中国安全科学学报,2014,24(11):84-88.DONG Qinxiang,WANG Zhaofeng,HAN Yabei,et al.Research on TNT equivalent of liquid CO2phase-transition fracturing[J].China Safety Science Journal,2014,24(11):84-88.
[11]李夕兵.凿岩爆破工程[M].长沙:中南大学出版社,2011:255-257.LI Xibing.Drilling and blasting engineering[M].Changsha:Central South University Press,2011:255-257.
[12]周磊.台阶爆破效果评价及爆破参数优化研究[D].武汉:武汉理工大学,2012.ZHOU Lei.Bench blasting effect complex evaluation and blasting parameters optimization[D].Wuhan:Wuhan University of Technology,2012.
[13]GB6722—2014,爆破安全规程[S].GB6722—2014,Safety regulations for blasting[S].
[14]刘军,吴从师,高全臣.建筑结构对爆破震动的响应预测[J].爆炸与冲击,2000,20(4):333-337.LIU Jun,WU Congshi,GAO Quanchen.A research on predicting structural responses to blasting vibration[J].Explosion and Shock Waves.2000,20(4):333-337.
[15]胡建华,尚俊龙,罗先伟,等.单孔爆破振动监测与衰减规律多元线性化回归[J].振动与冲击,2013,32(16):49-53.HU Jianhua,SHANG Junlong,LUO Xianwei,et al.Monitoring of single-hole blasting vibration and detection of its attenuation law by using multiple linear regression[J].Journal of Vibration and Shock,2013,32(16):49-53.