尾矿土工织物编织袋层间界面摩擦强度特性研究

金属矿山 ›› 2013, Vol. 42 ›› Issue (06): 114-117.

尾矿土工织物编织袋层间界面摩擦强度特性研究

朱君星^1,2，张默^1,2，曹作忠^1,2，李东³

1.中钢集团马鞍山矿山研究院有限公司；2.金属矿山安全与健康国家重点实验室；3.河海大学岩土工程科学研究所

出版日期:2013-06-17 发布日期:2013-08-09
基金资助:
* 国家重点基础研究发展计划(973计划)项目(编号：2010CB735507)，“十二五”国家科技支撑计划项目(编号：2012BAK09B05)。

Study on the Layer Interface Friction Strength Characteristics of Tailings Geotextiles Woven Bags

Zhu Junxing^1,2，Zhang Mo^1,2，Cao Zuozhong²，Li Dong³

1.Sinosteel Maanshan Institute of Mining Research Co.，Ltd.；2.State Key Laboratory of Safety and Health for Metal Mines；3.Geotechnical Research Institute of Hohai University

Online:2013-06-17 Published:2013-08-09

摘要/Abstract

摘要： 尾矿干式堆存技术近年来逐渐被推广应用，与传统的尾矿库堆存技术相比，尾矿干式堆存能够降低尾矿含水量，增强尾矿的力学性能，提高尾矿库的整体稳定性。在利用土工织物大型编织袋充灌尾矿干堆新技术中，土工织物编制袋层间界面的摩擦强度是影响和决定整个尾矿干堆场稳定性的主要指标。根据制作加工简易的大型土工“似直剪仪”，进行不同含水率和法向压力下的尾矿土工织物编织袋摩擦抗剪强度试验，得出尾矿土工织物编织袋层间界面摩擦系数和抗剪强度关系曲线，同时用一阶线性拟合的摩擦抗剪强度方程较符合摩尔-库伦强度准则。该抗剪强度方程能够反映土工织物层间界面摩擦的物理力学参数及变形特征，为尾矿土工织物编织袋干式堆存筑坝的稳定性计算提供依据。

关键词: 尾砂干堆, 土工织物编制袋, 层间界面, 摩擦强度, 似直剪仪

Abstract: In recent years，the tailings dry stockpiling technology was gradually popularized and applied.Compared with the traditional tailings stockpiling technology，the dry stockpiling technique can reduce water content in tailings，increase the mechanical parameters of tailings，and improve the overall stability of tailings pond.In the new technology of tailings dry stockpiling with filling of large geotextile woven bag，the interface frictional strength between layers of geotextile woven bag is the main indicator which influences and determines the stability of the entire tailings dry stockpiling.According to the easy production processing of large-scale geotechnical “resembling direct shear apparatus”，tailings geotextile woven friction shear strength test under different moisture content and normal pressure is carried out，drawing the relationship curve between interface friction coefficient and shear strength of the tailings layer of geotextile fabric woven bags，simultaneously the linear fitting friction and shear strength equation is in line with the Mohr-Coulomb criterion.The shear strength equation can reflect the physical-mechanical parameters and deformation characteristics of the geotextile layer interface friction，to provide the basis for the stability calculations of dry stockpiling damming with tailings geotextile woven bags.

Key words: Tailings dry stockpiling, Geotextiles woven bag, Layer interface, Friction strength, Resembling direct shear apparatus

朱君星, 张默, 曹作忠, 李东. 尾矿土工织物编织袋层间界面摩擦强度特性研究[J]. 金属矿山, 2013, 42(06): 114-117.

ZHU Jun-Xing, ZHANG Mo, CAO Zuo-Zhong, LI Dong. Study on the Layer Interface Friction Strength Characteristics of Tailings Geotextiles Woven Bags[J]. Metal Mine, 2013, 42(06): 114-117.

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