山东煤炭科技2025，Vol.43Issue(12)：1-7,7.DOI:10.3969/j.issn.1005-2801.2025.12.001
卸压-锚固协同效应多尺度能量演化机制及应力调控研究
Research on the Multi scale Energy Evolution Mechanism and Stress Regulation of Pressure Relief-Anchoring Collaborative Effect
杨军1
作者信息
- 1. 贵州省六盘水市水城区能源局,贵州 六盘水 553000
- 折叠
摘要
Abstract
In response to the phenomenon of large deformation in surrounding rock following drilling pressure relief in high-stress roadways,this article utilizes PFC 3D numerical simulations to construct a hole-bolt composite structure.It explores the energy evolution law and the characteristics of stress field distribution resulting from the collaborative effect of the hole and bolt.The research indicates that increasing the bolt pre-tightening force and the spacing between holes and bolts enhances the synergistic effect of pressure relief and anchoring.However,this coupling effect diminishes when the spacing between anchor holes is either too close(20 mm)or too far(40 mm).Microscopic analysis of the stress field reveals that an increase in bolt pre-tightening force exacerbates stress concentration around the bolt,while a stress relaxation area consistently exists between the hole and bolt.Optimal spacing can create a continuous low-stress zone,thereby improving the efficiency of hole-bolt collaborative.The stress concentration coefficient Kr at the bolt increases by 24.68%with the increase of bolt pre-tightening force,and increases by 39.42%when L=35mm,confirming the significant influence of hole anchor parameters on stress regulation.The findings of this research provide a theoretical foundation for the collaborative prevention and control of pressure relief and anchoring in deep roadways.关键词
钻孔卸压/锚固结构/能量演化/协同机制/应力调控Key words
borehole pressure relief/anchorage structure/energy evolution/collaborative mechanism/stress regulation分类
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杨军..卸压-锚固协同效应多尺度能量演化机制及应力调控研究[J].山东煤炭科技,2025,43(12):1-7,7.
