| 水平分层胶结充填体损伤本构模型及强度准则 |
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| 引用本文： | 汪杰,宋卫东,谭玉叶,付建新,曹帅.水平分层胶结充填体损伤本构模型及强度准则[J].岩土力学,2019,40(5):1731-1739. |
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| 作者姓名： | 汪杰 宋卫东 谭玉叶 付建新 曹帅 |
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| 作者单位： | 1. 北京科技大学 土木与资源工程学院，北京 100083；2. 北京科技大学 金属矿山高效开采与安全教育部重点实验室，北京 100083 |
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| 基金项目： | 国家重点研发计划（No. 2018YFC0604602）；中央高校基本科研业务费专项（No. FRF-BD-18-006A）。 |
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| 摘 要： | 以矿山分层充填为背景，针对水平分层充填体，提出了初始分层损伤、荷载损伤与总损伤的概念；利用损伤力学理论，考虑分层效应，建立了充填体损伤演化及本构模型；基于全微分方法构建了考虑分层效应的充填体强度准则。开展了不同分层充填体力学特性试验。研究结果表明：所建立的分层充填体损伤本构模型及强度准则理论曲线与试验曲线高度吻合，验证了模型的正确性；初始分层损伤随分层数增多，呈现 的二次多项式递增，分层效应与荷载耦合作用劣化了充填体总损伤；充填体总损伤率呈先增大后减小趋势。在峰值之前，分层数越多，则总损伤率越大；而峰值之后，分层数越多，则总损伤率越小，且总损伤率最大值随分层数增多而增大。
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| 关 键 词： | 充填体 分层效应 初始分层损伤 损伤本构模型 强度准则 |
| 收稿时间： | 2018-01-03 |
Damage constitutive model and strength criterion of horizontal stratified cemented backfill |
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| WANG Jie,SONG Wei-dong,TAN Yu-ye,FU Jian-xin,CAO Shuai.Damage constitutive model and strength criterion of horizontal stratified cemented backfill[J].Rock and Soil Mechanics,2019,40(5):1731-1739. |
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| Authors: | WANG Jie SONG Wei-dong TAN Yu-ye FU Jian-xin CAO Shuai |
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| Institution: | 1. School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. Key Laboratory of High-Efficient
Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | With horizontal slice backfilling of mines as the background, three concepts, namely initial stratified damage, loaded damage and total damage, were put forward for horizontal stratified cemented backfill. Based on the damage mechanics theory, the damage evolution model and the damage constitutive model were built with the consideration of the stratification effect. Based on the method of full differential function, a strength criterion of backfill, which considered the effect of stratified structure, was established. Then, tests to investigate the mechanical properties of backfills with different number of layers were conducted. Based on the results of tests, several conclusions can be drew. The theoretical curve of the damage constitutive model and the strength criterion fit the experimental results well, which verifies the correctness of the newly proposed models. The initial stratified damage increase at a quadratic polynomial function with the increase of the number of layers. The total damage of backfills is aggravated by the coupling effect of stratification and load. The total damage rate of backfill tends to firstly increase and later decrease. Before the peak, the total damage rate increases with the increase of the number of layers; after the peak, the total damage rate decreases with the increase of the number of layers, while the maximum of total damage rate increases with the increase of the number of layers. |
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| Keywords: | backfill stratification effect initial stratified damage damage constitutive model strength criterion |
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