摘要
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 go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.
Abstract
Researching controlled blasting technology for hazardous rock bodies in complex environments holds significant theoretical importance and provides valuable reference points for enhancing highway construction efficien-cy and mitigating potential risks.This study focuses on the Gulin-Jinsha highway construction project,aiming to elim-inate 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,fa-cilitating 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 environ-ments.
维普
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