袁海梁,刘孝义,陈少波,卢玉斌,张万虎,马飞飞,鹿存金,董斌,刘金泉
YUAN Hai-liang,LIU Xiao-yi,CHEN Shao-bo,LU Yu-bin,ZHANG Wan-hu,MA Fei-fei,LU Cun-jin,DONG Bin,LIU Jin-quan

• 1:中国化学工程重型机械化有限公司
• 2:福州大学先进制造学院
• 3:中国科学院海西研究院泉州装备制造研究所
• 4:中化学建设投资集团有限公司

摘要(Abstract)：

为解决液态CO_2相变爆破破岩仿真中面临的网格畸变等问题，基于光滑粒子流体动力学分析方法(SPH)建立了高压射流冲击破岩数值仿真模型。并通过开展不同射流速度下的液态CO_2相变爆破破岩数值仿真研究，探讨了高压射流作用下裂纹扩展的规律和机理。得出对于强度为24 MPa的煤岩，单孔冲击峰值压力在67.2～90.1 MPa,射流冲击速度在250～280 m/s时爆破破裂效果最佳。然后对比了煤岩、大理岩等不同岩体性质下的爆破破坏特征，进一步证实该方法在液态CO_2相变爆破仿真中的有效性，为液态CO_2相变破岩仿真提供了一种新思路。同时仿真结果可以为液态CO_2相变致裂技术在实际工程中的参数选择提供参考。
In order to solve the mesh distortion problems in simulation of liquid CO_2 phase change blasting rock breaking, based on smooth particle fluid dynamics analysis(SPH), a numerical simulation model of high pressure jet impact rock breaking was established. Through the numerical simulation of liquid CO_2 phase change blasting rock breaking under different jet velocities, the law and mechanism of crack propagation under high pressure jet are discussed. The results show that for the coal rock with strength of 24 MPa, the peak pressure of single hole impact is 67.2～90.1 MPa, and the jet impact velocity is 250～280 m/s. Then, the blasting failure characteristics of different rock masses such as coal rock and marble are compared, the effectiveness of this method in the simulation of liquid CO_2 phase change blasting is further verified and a new idea is provided for the simulation of liquid CO_2 phase change rock breaking. The simulation results can provide reference for the parameter selection of liquid CO_2 phase transition cracking technology in practical engineering.

关键词(KeyWords)： CO_2相变爆破;SPH;数值模拟;裂纹扩展
CO_2 phase change blasting;SPH;numerical simulation;crack propagation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51809253);; 福建省自然科学基金资助项目(2019J01142)

作者(Author): 袁海梁,刘孝义,陈少波,卢玉斌,张万虎,马飞飞,鹿存金,董斌,刘金泉
YUAN Hai-liang,LIU Xiao-yi,CHEN Shao-bo,LU Yu-bin,ZHANG Wan-hu,MA Fei-fei,LU Cun-jin,DONG Bin,LIU Jin-quan

DOI: 10.19931/j.EB.20210280

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