| 高压下尾矿材料幂函数型摩尔强度特性研究 |
| |
| 引用本文： | 刘海明,杨春和,张超,冒海军,曹净.高压下尾矿材料幂函数型摩尔强度特性研究[J].岩土力学,2012,33(7):1986-1992. |
| |
| 作者姓名： | 刘海明 杨春和 张超 冒海军 曹净 |
| |
| 作者单位： | 1.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试验室，武汉 430071；2.昆明理工大学 建筑工程学院，昆明 650500 |
| |
| 基金项目： | 国家自然科学基金资助项目(No.51004099);岩土力学与工程国家重点实验室前沿探索性项目(No.SKLQ003) |
| |
| 摘 要： | 高压下尾矿材料的强度特性是高尾矿坝稳定性分析的基础。理论推导了幂函数型摩尔（Mohr）强度通式 须满足的条件为 ， ， ；基于高压三轴试验研究了尾矿材料的强度特征，研究表明：幂函数型摩尔强度包络线能较好地反应尾矿材料在高压下的强度特征；尾矿材料在高压作用下试验前、后的颗粒分析结果表明：当围压达到某一阈值时，尾矿材料在剪切过程中将发生颗粒破碎，对于德兴铜矿尾粉砂，阈值为1 200 kPa；对于德兴铜矿尾亚砂，阈值为1 600 kPa。研究成果可为高尾矿坝坝体稳定性评价提供理论依据。
|
| 关 键 词： | 尾矿材料 高压 摩尔强度准则 幂函数 颗粒破碎 |
| 收稿时间： | 2011-02-28 |
Study of characteristics of power function Mohr strength criterion for tailings material under high pressures |
| |
| LIU Hai-ming
,
YANG Chun-he
,
ZHANG Chao
,
MAO Hai-jun
,
CAO Jing.Study of characteristics of power function Mohr strength criterion for tailings material under high pressures[J].Rock and Soil Mechanics,2012,33(7):1986-1992. |
| |
| Authors: | LIU Hai-ming YANG Chun-he ZHANG Chao MAO Hai-jun CAO Jing |
| |
| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Faculty of Civil Engineering and Architecture, Kunming University of Science and Technology, Kunming 650500, China |
| |
| Abstract: | It is necessary for stability analysis of high tailings dams to grasp the strength property of tailings material under high pressures.The theoretical derivation of a general power function based on the Mohr criterion must satisfy restrictions {,,}.The high stress traixial test results indicate that the power function of Mohr criterion reflects the strength characteristics of tailings material well under high pressures.The grain-size distribution curves of the pre-and post-test show that tailings material particles will crush in the cutting process when the confining pressure reaches or exceeds the threshold value.The threshold value for tailings silt of copper mine in Dexing is 1 200 kPa,and for tailings sub-silt of copper mine in Dexing is 1 600 kPa.Research results can provide the theoretical basis for the stability analysis of high tailings dams. |
| |
| Keywords: | tailings material high pressures Mohr strength criterion power function particle breakage |
| 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 |
