基于高精度三维模型的危岩体控制爆破技术研究

Research on Demolition Technology of Unstable Rock Mass based on High Precision 3D Model

开展复杂环境下危岩体控制爆破技术的研究,对提高公路施工效率、消除潜在安全隐患具有重要的理论意义和参考价值。依托古蔺至金沙高速公路建设项目为工程背景,为了消除施工过程中的危岩体隐患,进行危岩体控制爆破技术研究。采用三维激光扫描技术,架设6个扫描站点,构建了危岩体高精度三维DTM表面模型,结合高密度电法,布设4条物探测线,实现危岩体区域地质三维可视化。基于高精度三维模型,进行了裂岩管致裂试验,设计炮孔深度为危岩体高度的70%,裂岩管间采用串接方式,每孔裂岩管总装药量为720 g。结果表明:构建的高精度三维模型准确反映了危岩体形态特征,为爆破方案设计提供了可靠的资料,同时裂岩管的致裂效果良好,易于危岩体的后期治理排除,为同类项目提供了可行的参考方案。

Researching controlled blasting technology for hazardous rock bodies in complex environments holds significant theoretical importance and provides valuable reference points for enhancing highway construction efficiency and mitigating potential risks.This study focuses on the Gulin-Jinsha highway construction project,aiming to eliminate the dangers posed by hazardous rock bodies during construction.Six scanning stations were established using 3D laser scanning technology to create a high-precision 3D Digital Terrain Model(DTM)of the hazardous rock bodies.Additionally,four object detection lines were deployed using a high-density electrical method to achieve 3D visualization of the geological features in the hazardous rock area.A fracturing test was conducted based on the high-precision 3D model.The designed depth of the shell hole was 70%of the height of the hazardous rock body,with fracturing pipes connected in series and each pipe carrying a total charge of 720 g.The results demonstrated that the constructed high-precision 3D model accurately reflects the morphological characteristics of the hazardous rock body,providing reliable information for the blasting design.The fracturing pipes showed effective fracturing performance,facilitating the removal of the hazardous rock body during subsequent stages.This method offers a viable reference for similar projects,showcasing the potential for efficient and safe removal of hazardous rock bodies in complex environments.