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XU H L, GAO H J, GUO X,et al.Study on the impact resistance of a new type of support under circumferential pressure[J].Journal of Henan Polytechnic University(Natural Science) ,2024,43(4):21-28.

围压作用下新型支架抗冲击性能研究

许海亮, 高晗钧, 郭旭, 宋义敏, 安栋

北方工业大学 土木工程学院，北京 100144

摘要: 目的 针对巷道传统门式支护结构承载力不足的问题，提出一种多向吸能防冲支护结构。 方法 通过建立与围岩协同作用下的数值分析模型，研究支护体系在面对静载、竖向冲击与横向冲击工况时的支护效果。 结果  结果表明：（1）静载工况下，巷道左柱与右柱的柱顶与柱底最易发生破坏；新型支架只发生较小的竖向位移，支护效果较好。（2）竖向和横向冲击作用下，巷道易发生破坏位置分别为巷道拐角处和巷道顶底中部；横向冲击时，巷道顶底中部有发生破坏趋势，后续需要对支架中柱进行加强。（3）新型支架在面对竖向冲击与横向冲击工况时其形变趋势基本相同，首先出现屈服位置为顶梁连接处与立柱结构连接处，后续可针对该位置进行强化。（4）相比传统门式支架，新型支架的柔性链与V形槽结构受到冲击时能够迅速响应，为支护结构提供较好的保护作用。 结论 研究结果为门式支护结构在巷道支护中的运用提供参考。

关键词:多向吸能防冲支护结构;吸能构件;巷道支护;冲击地压

doi:10.16186/j.cnki.1673-9787.2022090053

基金项目:国家自然科学基金资助项目（51774015）

收稿日期:2023/06/21

修回日期:2023/09/22

出版日期:2024/07/15

Study on the impact resistance of a new type of support under circumferential pressure

XU Hailiang, GAO Hanjun, GUO Xu, SONG Yimin, AN Dong

School of Civil Engineering，North China University of Technology，Beijing 100144，China

Abstract: Objectives In view of the problems with traditional portal support structures in roadways， MethodsA  multi-directional energy-absorbing and anti-impact support structure was proposed was proposed.By establishing a numerical analysis model under the synergistic action with the surrounding rock，the support effect of the support system in the face of static load，vertical impact and lateral impact conditions was studied.  Results The results showed that：（1）Under static load conditions，the top and bottom of the left and right columns of roadways were most prone to damage，the new type of bracket only experienced a small vertical displacement，resulting in a better support effect.（2）Under the action of vertical and lateral impact，roadways were prone to damage at the corner and the top and bottom respectively.In the case of lateral impact，the top and bottom of roadways tended to be damaged，necessitating subsequent strengthening of the center column of the bracket.（3）The deformation trends of the new bracket facing vertical and lateral impact conditions were basically same，with the first yielding occurring at the connection between the top beam and the column structure，which could be subsequently reinforced.（4）Compared to traditional portal brackets，the new bracket’s flexible chain and V-groove structure responded quickly to impact，providing better protection for the support structure.  Conclusions The results of the study provided a useful reference for the use of portal support structures in tunnel support.

Key words:multi-directional energy-absorbing and anti-impact support structure;energy-absorbing element;roadway support;impact ground pressure