锚固岩体蠕变特性的物理模拟实验研究

doi:10.13722/j.cnki.jrme.2014.s2.028

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摘要基于岩体与锚杆相似配比特性，在室内RLW–2000型流变仪上进行锚固岩体相似模拟试件的蠕变特性实验，确定锚固岩体的蠕变控制方程，对其基本流变参数进行反演，最后开展蠕变实验曲线与理论曲线的对比分析。结果表明：锚固试件在与无锚试件同一应力(加载)水平作用下，表现出初始蠕变与等速蠕变特性，随着应力(加载)水平提高，无锚及锚固试件蠕变应变呈非线性增加趋势，且蠕变应变差值越来越大；在同一应力(加载)水平不同锚杆支护参数条件下，随着锚杆根数增加，蠕变应变呈非线性减小，应变差值越来越小；锚固岩体长期强度随着锚杆根数增加而提高，但也存在合理布置密度；M-K-B锚固岩体模型具有瞬时应变和等速蠕变特性，蠕变实验曲线与反演理论曲线较为一致，研究结果为锚固岩体蠕变控制提供参考。

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	辛亚军
	勾攀峰

关键词 ：岩石力学, 相似模拟, 锚固岩体蠕变, 控制模型, 反演分析, 稳定性

Abstract：Based on similar ratio characteristics of rock and bolt，creep experiment of similar simulation anchorage specimen was carried out on RLW–2000 rheometer，creep control equation on anchorage rock were determined，basic rheological parameters were inverse calculated，and creep experiment and theoretical curves were compared and analyzed. Results show that anchorage specimen have initial and stable creep in non-anchorage specimen stress(loading) level. With stress level improving，creep strain on non-anchorage and anchorage specimen is nonlinear increasing，and creep strain difference value is more and more. Creep strain is nonlinear decreasing with bolt amount increasing in same stress(loading) level and different bolting parameters，and strain different value is less and less. The long-term strength of anchorage rock improves with bolt amount increasing beside reasonable layout density. M-K-B anchorage body model has characteristics of instantaneous strain and steady creep. Creep experiment curve is consistent with theoretical curve of inverse calculation，and the results provide reference for anchorage rock creep control.

Key words： rock mechanics similar simulation anchorage body creep control model inverse analysis stability

引用本文:

辛亚军，勾攀峰. 锚固岩体蠕变特性的物理模拟实验研究[J]. 岩石力学与工程学报, 2014, 33(S2): 3613-3624.
XIN Yajun，GOU Panfeng. STUDY ON PHYSICAL SIMULATION EXPERIMENT FOR ANCHORAGE ROCK CREEP CHARACTERISTICS. , 2014, 33(S2): 3613-3624.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.s2.028 或 https://rockmech.whrsm.ac.cn/CN/Y2014/V33/IS2/3613

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