Scholarlink

<p>Overbreak and underbreak are key challenges encountered in drilling and blasting, significantly affecting engineering quality and operational safety. This study addresses the problem of overbreak and underbreak in the Jianshan Underground Mine in Panzhihua. The Riede–Hiermaie–Thoma (RHT) constitutive parameters are determined based on the rock properties on-site and are modified using computed tomography (CT) results from single borehole blasting experiments. The dynamic analysis code is implemented using finite element analysis (Ls-dyna). First, employing the response surface methodology (RSM) experimental method, the influence of single and interactive factors, such as borehole spacing <i>S</i>, smooth blasting layer thickness <i>B</i>, and charge decoupling coefficient <i>Φ</i>, on the surrounding forming effect is analyzed through 2D simulation. The reliability of these results is verified through 3D simulation. The research results indicated that, based on multiple-factor analysis, the optimal contour blasting effect can be achieved for the on-site conditions with a hole spacing of 0.6&#xa0;m, a smooth blasting layer thickness of 0.7&#xa0;m, and a charge decoupling coefficient of 1.3. Finally, based on the point cloud distribution obtained from 3D laser scanning, a quantitative analysis method is proposed to characterize the flatness of the surrounding formation. The optimized scheme exhibits a 28% improvement in wall flatness compared to the original scheme, and this method serves as a critical reference for evaluating the effectiveness of intelligent mine construction.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Optimization and Evaluation of Smooth Blasting Based on RSM-BBD and Point Cloud Data

  • 期刊论文

  • 发表日期：

    2025年5月11日

查看全文
  • Xiang Zhang,
  • Yang Yang,
  • Renshu Yang,
  • Jin Li,
  • Yong Zhao,
  • Shushuai Wang,
  • Shulin Chen,
  • Xiaojie Li

摘要

Overbreak and underbreak are key challenges encountered in drilling and blasting, significantly affecting engineering quality and operational safety. This study addresses the problem of overbreak and underbreak in the Jianshan Underground Mine in Panzhihua. The Riede–Hiermaie–Thoma (RHT) constitutive parameters are determined based on the rock properties on-site and are modified using computed tomography (CT) results from single borehole blasting experiments. The dynamic analysis code is implemented using finite element analysis (Ls-dyna). First, employing the response surface methodology (RSM) experimental method, the influence of single and interactive factors, such as borehole spacing S, smooth blasting layer thickness B, and charge decoupling coefficient Φ, on the surrounding forming effect is analyzed through 2D simulation. The reliability of these results is verified through 3D simulation. The research results indicated that, based on multiple-factor analysis, the optimal contour blasting effect can be achieved for the on-site conditions with a hole spacing of 0.6 m, a smooth blasting layer thickness of 0.7 m, and a charge decoupling coefficient of 1.3. Finally, based on the point cloud distribution obtained from 3D laser scanning, a quantitative analysis method is proposed to characterize the flatness of the surrounding formation. The optimized scheme exhibits a 28% improvement in wall flatness compared to the original scheme, and this method serves as a critical reference for evaluating the effectiveness of intelligent mine construction.