文献类型：期刊文献

英文题名：Physical model test study on shear strength characteristics of slope sliding surface in Nanfen open-pit mine

作者：Tao, Zhigang[1,2];Shu, Yu[1,2];Yang, Xiaojie[1,2];Peng, Yanyan[3,4];Chen, Qihang[3,4];Zhang, Haijiang[3,4,5]

机构：[1]China Univ Min & Technol Beijing, Sch Mech & Civil Engn, Beijing 100083, Peoples R China;[2]China Univ Min & Technol Beijing, State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China;[3]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[4]Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China;[5]Zhejiang Collaborat Innovat Ctr Prevent & Control, Shaoxing 312000, Peoples R China

年份：2020

卷号：30

期号：3

起止页码：421

外文期刊名：INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000542162000019)、、EI(收录号：20202208743283)、Scopus(收录号：2-s2.0-85085327244)、WOS

基金：This study was supported by Zhejiang Collaborative Innovation Center for Prevention and Control of Mountain Geologic Hazards (Grant no. PCMGH-2016-Z-02).

语种：英文

外文关键词：Landslide; Slope stability; Structural plane; Model test; NPR anchor cable

外文摘要：A physical model for the footwall slope of Nanfen open-pit mine, China was established using a selfdeveloped deep geological engineering disaster model test system. A thermosensitive similar material, paraffin, was selected to simulate a weak structural plane in the slope to reproduce the landslide process. From an experimental perspective, the variation trend of shear strength parameters of weak structural plane and the mechanical support characteristics of NPR (negative Poisson's ratio) anchor cable under the condition of a large landslide deformation and failure were examined. The results of this model test showed that slope failure has four distinct stages: (1) soil compaction stage, (2) crack generation stage, (3) crack propagation stage, and (4) sliding plane transfixion stage. According to the test results, the rock mechanics parameters of weak surface in the footwall slope of Nanfen open-pit mine were calculated. The cohesion is approximately 1.35 x 10(5) Pa, and the internal friction angle is approximately 6.33 degrees. During slope failure, the NPR anchor cable experiences a large deformation but no damage occurs, indicating that the NPR anchor cable can be continuously monitored and reinforced during the deformation and failure of landslide. The stress characteristics of NPR anchor cables during the test are consistent with the monitoring results of Newtonian force at the landslide site, proving that NPR anchor cables are effective and reasonable in landslide monitoring and early warning. (C) 2020 Published by Elsevier B.V. on behalf of China University of Mining & Technology.