线型聚能切割器在岩石预裂成缝中的应用

    APPLICATION OF ENERGY-CONCENTRATED EXPLOSIVE-LOADING METHOD TO CUT PRE SPLIT CRACKS

    • 摘要: 聚能预裂爆破与普通预裂爆破相比,爆破效果明显提高,能有效地控制预裂缝的扩展。文中根据对实验结果和线型聚能装药效应机理的分析研究,提出了新的岩石聚能装药预裂切缝方法,引入了粘弹塑性断裂模型,优化了影响聚能效果的基本参数,并指出其在岩石预裂爆破中的发展方向和应用前景。

       

      Abstract: Compared with conventional pre-split blasting,energy-concentrated explosive loading method to cut pre-split cracks possesses advantages of high blasting efficiency and better control of pre-split crack expansion.Based on analysis of test results and charging mechanis,the new method of energy-concentrated explosive loading to cut pre-split cracks is introduced,and the visco-elasto-plastic fracture model is established.In addition,basic parameters influencing the effectiveness of energy-concentrated explosive loading are optimized.At the end of the paper,the developing direction and application prospect of the new method are pointed out.

       

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