| 加锚岩体流变特性及锚固控制机制分析 |
| |
| 引用本文： | 赵同彬,谭云亮,刘姗姗,肖亚勋.加锚岩体流变特性及锚固控制机制分析[J].岩土力学,2012,33(6):1730-1734. |
| |
| 作者姓名： | 赵同彬 谭云亮 刘姗姗 肖亚勋 |
| |
| 作者单位： | 1. 山东科技大学 资源与环境工程学院，山东 青岛 266510；2. 煤炭资源与安全开采国家重点实验室（中国矿业大学），北京 100083； 3. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071 |
| |
| 基金项目： | 国家自然科学基金(No.51004068);山东省优秀中青年科学家科研奖励基金(No.BS2011NJ014);煤炭资源与安全开采国家重点实验室开放基金项目(No.SKLCRSM10KFB03) |
| |
| 摘 要： | 通过室内蠕变试验和理论分析，对加锚改善岩石流变力学特性进行了研究，并探讨了锚固控制岩石流变的力学机制。采用RLJW-2000型流变试验机，对红砂岩及其加锚试件进行分级加载（100 h以上）单轴压缩试验，结果表明，加锚后岩石的流变应力阀值提高了20%～30%? c，且不同应力水平流变量均能得到一定控制，加锚使试件的长期强度增加了5%～10%? c。此外，基于整体协调变形原理，建立了加锚体流变本构方程，推导出了一维B-K模型解答，算例分析表明，锚杆密度越大，对岩石流变控制效果越好，得出锚杆等效刚度是约束岩石流变的主导因素，但从技术经济角度考虑，锚杆支护密度与岩石流变参数之间存在一个合理的匹配区间。研究结果对长期使用的岩体工程锚固支护设计提供了理论依据。
|
| 关 键 词： | 加锚岩石 流变特性 本构模型 锚固机制 |
| 收稿时间： | 2011-12-19 |
Analysis of rheological properties and control mechanism of anchored rock |
| |
| ZHAO Tong-bin
,
TAN Yun-liang
,
LIU Shan-shan
,
XIAO Ya-xun.Analysis of rheological properties and control mechanism of anchored rock[J].Rock and Soil Mechanics,2012,33(6):1730-1734. |
| |
| Authors: | ZHAO Tong-bin TAN Yun-liang LIU Shan-shan XIAO Ya-xun |
| |
| Institution: | 1. College of Resources and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266510, China; 2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Beijing 100083, China; 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
| |
| Abstract: | By laboratory test and theoretical analysis,the rheological properties of anchored rock and controlling mechanism by anchor are studied.The results show that,non-anchored and anchored specimens’ indoor long-time(above 100 h) creep test is done by RLJW-2000 rheology tester;creep stress threshold of anchored rock is increased by about 30% c;creep deformations at different stress level stages are significantly controlled;and anchored specimen’s long-term intensity is increased by 5% to 10% c.In addition,according to the equivalent co-deformation principle,one-dimensional creep constitutive equation of anchored rock is established;the answer of anchored generalized Kelvin(B-K) model is derived.The example shows that rock rheology’s control effect gets better with increasing of bolt consistency,which can be obtained that the anchor’s equivalent stiffness is a dominant factor restraining rock rheology.But from the view of economic technology,bolt consistency and rock rheological parameters have a rational matching interval.The result provides a theoretical basis for the anchorage support design of rock engineering after long-term service. |
| |
| Keywords: | anchored rock rheological property constitutive model anchoring mechanism |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
