摘要
传统炸药爆破存在环境污染和效率低下等问题,而液氧储能破岩作为一种低振、环境友好的气体膨胀致裂技术,具有良好的应用前景。通过高速红外热成像系统和超压监测系统,探究不同液氧量下温度场演变规律及压力场超压衰减特性。研究结果表明:液氧相变膨胀过程中,温度场呈现双峰特征,吸、放热反应交互进行,流场处于动态非平衡状态;液氧量显著影响物相转化效率,且内部能量传递存在平衡点,流场温度并不会持续升高;不同液氧量导致云图中超温发展阶段存在明显差异,进而影响峰值温度的大小;随着液氧量增加,温度曲线的振荡频率和幅度均增强,双峰温度呈现出截然不同的变化趋势;不同测点处的超压峰值及其变化趋势各异,且随着传播距离增加而衰减;温度场和压力场的动态关系决定了爆破流场中的物质转化和能量流动。研究成果为液氧膨胀破岩技术的应用奠定了基础。
Traditional explosive blasting faces challenges such as environmental pollution and low effi-ciency,whereas liquid oxygen expansion rock breaking,as a low-vibration and environmentally friendly gas expansion fracturing technology,holds promising application prospects.Using high-speed infrared thermal imaging and overpressure monitoring systems,this study probed into the evolution patterns of tem-perature field and the overpressure attenuation characteristics of pressure field under different volumes of liquid oxygen.The results reveal that during the phase change expansion of liquid oxygen,the temperature field features a bimodal distribution,where alternating heat absorption and release reactions drive the flow field into a state of dynamic non-equilibrium.The volume of liquid oxygen significantly affects the phase change efficiency,and an equilibrium point exists in internal energy transfer.As a result,the temperature in the flow field will not rise continuously.Different volumes of liquid oxygen lead to notable differences in the overtemperature development stages in contour plots,consequently influencing peak temperature magnitudes.As the volume of liquid oxygen expands,the oscillation frequency and amplitude of temperature curves are both enhanced,with the dual peak temperatures displaying different trends.The overpressure peak values and their variation trends vary at different measurement points,and they attenuate as the propagation distance lengthens.The dynamic relationship between the temperature and pressure fields determines material transformation and energy flow in the blast flow field.These findings are expected to provide a foundation for the application of liquid oxygen expansion rock-breaking technology.
作者
王雁冰
赵小艳
马丹
王滔
彭会椿
刘超
彭驭涛
雷振
WANG Yanbing;ZHAO Xiaoyan;MA Dan;WANG Tao;PENG Huichun;LIU Chao;PENG Yutao;LEI Zhen(School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083;Key Laboratory of Deep Coal Resource Mining,Ministry of Education,China University of Mining and Technology,Xuzhou,Jiangsu 221116;China Gezhouba Group No.3 Engineering Co Ltd,Xian,Shaanxi 710077;Institute of Mining Engineering,Guizhou Institute of Technology,Guiyang,Guizhou 550025)
出处
《采矿与安全工程学报》
北大核心
2025年第4期949-959,共11页
Journal of Mining & Safety Engineering
基金
国家重点研发计划青年科学家项目(2022YFC2905600)
中央高校基本科研业务费专项资金(2025JCCXLJ01)。
关键词
液氧爆破
相变膨胀
红外热成像
温度场
超压监测
s liquid oxygen blasting
phase change expansion
infrared thermal imaging
temperature field
overpressure monitoring
