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高原高寒冻融岩体爆破关键技术研究

Key technologies of blasting in plateau alpine freeze-thaw rock mass

  • 摘要: 针对高原高寒冻融环境下岩体动力学特性及钻爆施工难题,系统分析了冻融循环作用对岩体强度劣化的影响机制,以及冻土层非均匀性、炮孔涌水结冰、钻孔偏斜等问题对爆破效果的制约。基于工程实践,提出了3项创新性技术:钻孔姿态参数测量技术、炮孔除(融)冰技术及深、浅组合爆破技术。能够测量直线−弧形孔的钻孔姿态参数,利用高压气体破冰的方法解决炮孔涌水结冰,有效解决冻层不均匀对爆破参数的影响,从而提高爆破质量。这些技术应对了高原高寒地区的复杂条件,克服了冻融岩石带来的挑战。不仅提高了高原矿区钻爆作业的安全性与经济性,还为高寒地区基础设施建设提供了关键技术支撑,具有显著的工程应用价值与社会效益。

     

    Abstract: In view of the rock mass dynamics characteristics and drilling-blasting construction challenges in plateau alpine freeze-thaw environments, the influence mechanism of freeze-thaw cycles on rock mass strength degradation was systematically analyzed, as well as the constraints of uneven frozen soil layers, blast hole water gushing and freezing, and borehole deviations on blasting efficiency. Three practical solutions were proposed based on engineering practices, including borehole attitude parameter measurement technology, blast hole deicing (thawing) technology, and combined deep-shallow blasting technology. The attitude parameters for straight-arc boreholes can be measured, and the high-pressure gas deicing method was adopted to address blast hole water gushing and freezing. Meanwhile, the influence of uneven frozen soil layers on blasting parameters was mitigated, thereby improving blasting quality. These technologies successfully tackle the complex conditions in plateau alpine regions, overcoming the challenges posed by freeze-thaw rock. Additionally, they not only improve the safety and economy of blasting operations in plateau mines, but also provide critical technological support for the infrastructure construction of alpine regions, demonstrating notable engineering application significance and social benefits.

     

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