曾华恒,解叶龙,胡艳,陈必港,魏勇,霍晓锋

• 1:福州大学紫金地质与矿业学院
• 2:福州大学爆炸技术研究所
• 3:中昌核工(福建)建设发展有限公司
• 4:福建省交通科研院有限公司

摘要(Abstract)：

针对目前高压气体破岩机理研究还不够充足的现状，参考钻爆法中孔壁峰值压力的计算方法，在分析了液氧膨胀破岩法破岩的整个流程后，基于激波管理论，推导了一种不同岩石介质和不耦合系数下液氧膨胀破岩孔壁峰值压力计算模型。通过混凝土模型实验，利用动态应变测试仪测试孔壁峰值压力，在固定膨胀管直径60 mm,在4种不同孔径(75～120 mm)的条件下，进行孔壁峰值压力测试。测试结果表明：在液氧当量与岩石介质条件一致时，仅改变不耦合系数，测得的孔壁压力到达峰值的时间随着不耦合系数的增大而增加，其线性拟合式为t=230.6k-127.85;随不耦合系数的增大，孔壁峰值压力逐渐减小，且衰减程度逐渐放缓；对比孔壁峰值压力测试结果与理论计算结果，得出二者的孔壁峰值压力随不耦合系数的衰减趋势相近，验证了理论计算的可靠性。

关键词(KeyWords)： 液氧膨胀破岩法;径向不耦合安装;孔壁峰值压力;模型实验

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52109124)~~

作者(Author): 曾华恒,解叶龙,胡艳,陈必港,魏勇,霍晓锋

参考文献(References)：

• [1] 陈明，刘涛，叶志伟，等.轮廓爆破孔壁压力峰值计算方法[J].爆炸与冲击，2019,39(6):103-112.[1] CHEN Ming,LIU Tao,YE Zhi-wei,et al.Calculation method for peak pressure of contour blasting hole wall[J].Explosion and Impact,2019,39(6):103-112.(in Chinese)
• [2] 楼晓明，王振昌，陈必港，等.空气间隔装药孔壁初始冲击压力分析[J].煤炭学报，2017,42(11):2875-2884.[2] LOU Xiao-ming,WANG Zhen-chang,CHEN Bi-gang,et al.Analysis of initial impact pressure on the wall of air gap charge holes[J].Journal of China Coal Society,2017,42(11):2875-2884.(in Chinese)
• [3] 叶志伟，陈明，李桐，等.小不耦合系数装药爆破孔壁压力峰值计算方法[J].爆炸与冲击，2021,41(6):119-129.[3] YE Zhi-wei,CHEN Ming,LI Tong,et al.Calculation method for peak pressure on blasthole wall with small decoupling coefficient charge[J].Explosion and Impact,2021,41(6):119-129.(in Chinese)
• [4] 刘云川，汪旭光，刘连生，等.不耦合装药条件下炮孔初始压力计算的能量方法[J].中国矿业，2009,18(6):104-107,110.[4] LIU Yun-chuan,WANG Xu-guang,LIU Lian-sheng,et al.An energy-based method for calculating initial blasthole pressure under decoupled charging conditions[J].China Mining Magazine,2009,18(6):104-107,110.(in Chinese)
• [5] HUO Xiao-feng,QIU Xian-yang,SHI Xiu-zhi,et al.Experimental and numerical investigation on the peak value and loading rate of borehole wall pressure in decoupled charge blasting[J].International Journal of Rock Mechanics and Mining Sciences,2023,170:1-12.
• [6] 张宏伟，朱峰，李云鹏，等.液态CO2致裂技术在冲击地压防治中的应用[J].煤炭科学技术，2017,45(12):23-29.[6] ZHANG Hong-wei,ZHU Feng,LI Yun-peng,et al.Application of liquid CO2 fracturing technology in the prevention and control of rockburst[J].Coal Science and Technology,2017,45(12):23-29.(in Chinese)
• [7] LU Ting-kan,WANG Zhao-feng,YANG Hong-ming,et al.Improvement of coal seam gas drainage by under-panel cross-strata stimulation using highly pressurized gas[J].International Journal of Rock Mechanics and Mining Sciences,2015,77:300-312.
• [8] 彭怀德，刘敦文，褚夫蛟，等.硬岩隧道高压气体膨胀破岩开挖试验[J].岩土力学，2018,39(1):242-248.[8] PENG Huai-de,LIU Dun-wen,CHU Fu-jiao,et al.Experimental study on rock excavation by high-pressure gas expansion in hard rock tunnels[J].Rock and Soil Mechanics,2018,39(1):242-248.(in Chinese)
• [9] 魏海霞，祝杰，杨小林，等.高压气体爆破作用下层状岩体的地表振动效应预测方法[J].振动与冲击，2023,42(20):1-11.[9] WEI Hai-xia,ZHU Jie,YANG Xiao-lin,et al.Prediction method of surface vibration effect of stratified rock mass under high-pressure gas blasting[J].Journal of Vibration and Shock,2023,42(20):1-11.(in Chinese)
• [10] YANG Xue-lin,WEN Guang-cai,WEN Hai-tao,et al.Environmentally friendly techniques for high gas content thick coal seam stimulation multi-discharge CO2 fracturing system[J].Journal of Natural Gas Science and Engineering,2019,61:71- 82.
• [11] 袁永，陈忠顺，梁小康，等.二氧化碳相变爆破致裂机理与应用研究进展[J].煤炭科学技术，2024,52(2):63-78.[11] YUAN Yong,CHEN Zhong-shun,LIANG Xiao-kang,et al.Research progress on the fracturing mechanism and application of carbon dioxide phase transition blasting[J].Coal Science and Technology,2024,52(2):63-78.(in Chinese)
• [12] 方莹，李国良，朱振海，等.液氧相变气体膨胀技术在隧洞开挖中的应用研究[J].爆破，2024,41(2):232-237.[12] FANG Ying,LI Guo-liang,ZHU Zhen-hai,et al.Research on the application of liquid oxygen phase change gas expansion technology in tunnel excavation[J].Blasting,2024,41(2):232-237.(in Chinese)
• [13] 陶明，赵华涛，李夕兵，等.液态CO_2相变致裂破岩与炸药破岩综合对比分析[J].爆破，2018,35(2):41- 49.[13] TAO Ming,ZHAO Hua-tao,LI Xi-bing,et al.Comprehensive comparative analysis of rock breaking by liquid CO2 phase transition fracturing and explosives[J].Blasting,2018,35(2):41- 49.(in Chinese)
• [14] 宁建国，王成，马天宝.爆炸与冲击动力学[M]:北京：国防工业出版社，2010:110-112
• [15] SKURATOV S M,KOZINA M L,SHTEHER S M,et al.The heats of combustion of several purified compounds,Thermochem.Bull[M].Moscow:Moscow State Univ,1957:36-37.
• [16] 楼晓明，官旭晖，曾令峰，等.孔底间隔装药孔壁冲击压力特性[J].爆炸与冲击，2023,43(6):174-188.[16] LOU Xiao-ming,GUAN Xu-hui,ZENG Ling-feng,et al.Characteristics of impact pressure on blasthole wall with base-decoupled charging[J].Explosion and Impact,2023,43(6):174-188.(in Chinese)
• [17] ELEUTERIO F Toro.Riemann solvers and numerical methods for fluid dynamics[M].USA:Springer,2009:115-138.
• [18] 奥尔连科.爆炸物理学：全2册[M].3版.北京：科学出版社，2011.
• [19] 刘益儒，胡晓棉.一种基于Hugoniot关系的爆轰产物等熵状态方程[J].爆炸与冲击，2018,38(1):60- 65.[19] LIU Yi-ru,HU Xiao-mian.An isentropic equation of state for detonation products based on the hugoniot relation[J].Explosion and Impact,2018,38(1):60- 65.(in Chinese)
• [20] 钮强.岩石爆破机理[M].沈阳：东北大学出版社，1990.
• [21] 戴俊.岩石动力学特性与爆破理论[M].北京：冶金工业出版社，2013:120-136.
• [22] 万纯材.液氧炸药[J].化学通报，1960(2):24-34.[22] WAN Chun-cai.Liquid oxygen explosives[J].Chemistry,1960(2):24-34.(in Chinese)
• [23] HENRYCH J.The dynamics of explosion and its use[M].Amsterdam:Elsevier,1979.