Full-space collaborative control technology and its application for deeply buried roadways

ZUO Jianping; SUN Yunjiang; WEN Jinhao; WU Genshui; YU Meilu

doi:10.16511/j.cnki.qhdxxb.2021.25.018

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Journal of Tsinghua University(Science and Technology) ›› 2021, Vol. 61 ›› Issue (8) : 853-862. DOI: 10.16511/j.cnki.qhdxxb.2021.25.018

Engineering Application

Full-space collaborative control technology and its application for deeply buried roadways

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Abstract

Deep roadways use a variety of support methods with the support strength influenced by the ground stresses and the mechanical parameters of the surrounding rock. This paper summarizes the deformation characteristics of deep roadways. The full-space collaborative control method given here uses targeted optimization of the support methods and properties. Full-space collaborative control optimizes the soil rigidity and flexibility, pressure release, rock dynamics, and local reinforcement. The objective is to fully use the self-supporting capacity of the surrounding rock. The prestress fields are compared for a single anchor cable, a traditional truss and a space truss for various preloadings. The maximum prestress of the full space truss is 35%~40% higher than that of the single anchor cable. Additionally, simulations show that the cohesion, the internal friction angle and the elastic modulus all greatly influence the roadway deformation. Field practice shows that this design method can effectively control the deformation of the surrounding rock for roadways buried at various depths.

Key words

deep roadways / full-space collaborative control / mechanics principles / prestress fields / self-supporting surrounding rock

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ZUO Jianping, SUN Yunjiang, WEN Jinhao, WU Genshui, YU Meilu. Full-space collaborative control technology and its application for deeply buried roadways[J]. Journal of Tsinghua University(Science and Technology). 2021, 61(8): 853-862 https://doi.org/10.16511/j.cnki.qhdxxb.2021.25.018

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