Displacement Measurements and Numerical Analysis of Long-Term Rock Slope Deformation at Higashi-Shikagoe Limestone Quarry, Japan

Author:

Amagu Clement A.1ORCID,Zhang Cheng1,Kodama Jun-ichi1,Shioya Kazuyuki2,Yamaguchi Tomoyuki2,Sainoki Atsushi3,Fukuda Daisuke1,Fujii Yoshiaki1,Sharifzadeh Mostafa4

Affiliation:

1. Rock Mechanics Laboratory, Graduate School of Engineering, Hokkaido University, N13 W8, Kita-Ku, Sapporo 060-8628, Japan

2. Nittetsu Mining Co. Ltd., Yusen Building, 3-2, Marunouchi 2-Chome, Chiyoda-Ku, Tokyo 100-8377, Japan

3. International Research Organization for Advanced Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan

4. Western Australia School of Mine (WASM), Curtin University, Kalgoorlie, Australia

Abstract

The Higashi-Shikagoe limestone quarry is an open-pit mine situated in Hokkaido Prefecture, Japan, that has experienced four slope failure incidents since 1996. The rock slope behaviour has been monitored since the first failure event by measuring the rock slope surface displacement using an automated polar system. Recent measurements have revealed a gradual decrease of the distance between the beam generator and mirrors over time; however, the displacements and decrease rate differs between the centre and left- and right-hand sides of the quarry. This implies that the deformation characteristics of the rock slope and factors influencing the slope deformation differ at the centre and left- and right-hand sides of the quarry. In this study, the two-dimensional finite element method was used to identify the causes of slope deformation by investigating the effects of limestone excavation at the foot of the rock slope, the deterioration of a ∼70 m-thick clay layer at the rock slope foot wall, and shear failure owing to rainfall infiltration. The numerical results show that slope deformation on the left-hand side and centre of the quarry are induced by clay deterioration, whereas the right-hand side of the quarry is deformed owing to floor excavation and/or shear sliding. The rock slope is presently stable because the magnitude of the rate of displacement decrease is small and no acceleration is observed.

Funder

Ministry of Education, Culture, Sports, Science and Technology

Publisher

Hindawi Limited

Subject

Civil and Structural Engineering

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3