Optimization of Deep Shaft Excavation Technology through Soft Expansion Rock
The technological challenges encountered in deep shaft excavation through soft expansion rock are studied and optimized.With the increasing mining depth of mineral resources,the application of deep shaft is becoming more and more widespread.As one of the key technologies in construction,the complexity of deep shaft excavation is mainly reflected in sur-rounding rock control and support.In this paper,three optimization schemes are proposed to solve the problems of water expan-sion,high ground stress and slow excavation speed in the air inlet shaft of a mine.Employing the FLAC3D finite element soft-ware,a numerical simulation analysis was conducted on four distinct excavation and lining schemes.The study investigated the patterns of variation in the plastic zones of the surrounding rock and the displacement fields during the excavation process,cul-minating in the proposition of an excavation and lining scheme suitable for on-site application.The numerical simulation results are further verified by an engineering example,which proves the feasibility and effectiveness of the optimization scheme.The re-search results provide technical support for the related research and engineering practice of deep shaft through soft broken rock,and ensure the safe and efficient construction of deep shaft project.
deep shaftsoft broken rockexcavation technologynumerical simulation
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