富水地层树脂锚固体锚固性能劣化机理及优化方案

doi:10.11896/cldb.25070014

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Abstract The mines in western China are mainly Jurassic and Cretaceous weakly cemented strata. The rock strata are rich in water and their physical and mechanical properties are poor. The stability of surrounding rock is difficult to control, and the resin anchoring support structure is frequently lost. Aiming at this problem, firstly, the indoor experiments of consistency, compressive strength, and anchoring force of resin anchoring materials under different water content conditions were carried out. It was concluded that the consistency, compressive strength, and anchoring performance of resin anchoring materials gradually decreased with the increase of water content. Combined with SEM scanning, it was found that the internal micro-pores and cracks increased with the increase of water content. Secondly, the molecular dynamics simulation method is used to analyze the influence of different water content on the resin anchor itself and the influence of different aquifer thickness on the anchoring perfor-mance of the surrounding rock-anchor interface. It is revealed that the hydrogen bond between the resin molecules is destroyed with the increase of water content, and the original crosslinking network is weakened. The free volume of the resin anchor is filled at low water content (≤3.5%), while the swelling effect is obvious at high water content, and the movement of water molecules is intensified. When there is a water layer between the surrounding rock and the resin anchorage body, the original physical adsorption is blocked, the micro-chemical bonding structure between the resin and the surrounding rock is destroyed, and the bonding effect of the anchorage interface is obviously weakened. Finally, based on the foregoing investigations, an optimized anchorage scheme integrating regional geological control, performance modification of anchorage materials, and support technology optimization is proposed. By adopting the self-developed high-performance anchorage material applicable to water-bearing conditions and taking the water-rich weakly cemented strata of a western coal mine as the engineering prototype, the enhancement mechanism of the proposed material on surrounding rock stability is thoroughly analyzed. The research outcomes can offer a theoretical basis and technical reference for safe and efficient coal mining in analogous water-rich soft rock strata across western mining areas.

Key words： water-rich strata resin anchorage agent anchorage performance molecular dynamics degradation mechanism enhancement strategy

Published: 25 July 2026 Online: 2026-08-12

CLC number:

TD32

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	Articles by authors
	LIU Xiaohu
	YAN Libin
	YAO Zhishu
	CHENG Hua
	ZHA Wenhua
	XU Tao

Cite this article:

LIU Xiaohu,YAN Libin,YAO Zhishu, et al. Degradation Mechanism and Optimization Strategy of Resin Anchorage Performance in Water-rich Strata[J]. Materials Reports, 2026, 40(14): 25070014-9.

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https://www.mater-rep.com/EN/10.11896/cldb.25070014 OR https://www.mater-rep.com/EN/Y2026/V40/I14/25070014

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