强动压破碎软岩巷道再造多重承载结构全空间协同支护技术研究

doi:10.3724/1000-6915.jrme.2024.0914

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Abstract To address the challenges posed by complex regional stress and the maintenance of surrounding rock in soft rock roadways subjected to strong dynamic pressure crushing during excavation, this study focuses on the 1570 track stone gate of Daniuchang Coal Mine in Guizhou Province as the engineering context. A comprehensive research approach was employed, utilizing numerical simulations, theoretical analyses, and on-site industrial tests. Through on-site investigations and data monitoring, we analyzed the large deformation of the surrounding rock at Shimen on the 1570 track and the failure characteristics of the supporting components. The poor self-stability of the surrounding rock was investigated using water immersion tests (combined with XRD analysis) and loose ring tests. Numerical simulations were conducted to elucidate the stress distribution patterns during the excavation of the 1570 track stone gate, revealing its deformation and failure mechanisms. We specifically proposed a full-space collaborative support technology for the reconstructed multi-bearing structure. The ultimate bearing stress of the most critical section of the concrete steel arch frame was derived through theoretical analysis, confirming that the constrained steel pipe filling structure could effectively limit the significant structural movements induced by mining activities. The stress distribution and deformation control effects of the surrounding rock in the reconstructed multi-bearing structure were analyzed through numerical simulations, clarifying the control principles underlying the full-space cooperative support technology. By constructing a three-layer high-strength load-bearing structure, we integrated the shallow and deep surrounding rocks into a cohesive high-strength anchor solid load-bearing system. This approach harnesses the surrounding rock′s inherent load-bearing capacity and enhances the overall anti-deformation capability of the surrounding rock, thereby establishing a full-space three-dimensional support system that ensures roadway stability. Subsequent industrial tests conducted underground demonstrated that the full-space collaborative support technology for multi-bearing structures significantly mitigates deformation in roadways facing strong dynamic pressure crushing and soft surrounding rock. Compared to the original support system, the convergence of the top and bottom slabs of the roadway, as well as the two sides, was reduced by 91.67% and 88.33%, respectively. Additionally, this approach led to savings in roadway maintenance costs, providing an effective solution for managing surrounding rock in soft rock roadways subjected to strong dynamic pressure crushing.

Key words： mining engineering stress distribution soft rock roadway broken by strong dynamic pressure reconstructing multi-bearing structure binding steel pipe high prestressed anchorage

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	Articles by authors
	XU Youlin1
	WU Shaokang2
	ZHOU Bo1
	3
	ZHENG Wei1
	WU Xukun4
	ZHOU Ze1
	CHEN Zhisong3
	ZHANG Jitao5
	LI Bin3
	YAN Hong6
	ZHANG Chuanjiu7

Cite this article:

XU Youlin1,WU Shaokang2,ZHOU Bo1, et al. Full-space collaborative support technology for reconstructing multi-bearing structures in crushed soft rock roadways under strong dynamic pressure[J]. , 2025, 44(7): 1720-1735.

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https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2024.0914 OR https://rockmech.whrsm.ac.cn/EN/Y2025/V44/I7/1720

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