Evaluation on the instability of stope mining influenced by the risks of slope surface and previous mined-out activities

Naung Naung, Takashi Sasaoka, Hideki Shimada, Akihiro Hamanaka, Sugeng Wahyudi, Pisith Mao

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Open stope mining is the most common mining method adopted in underground metal mines in Myanmar. However, the assessments on the stability of stope still remain quite limited for this method. Even though mining objective is to recover ore as much as possible from the vein, safety of workers and machinery in the advancing stopes must be ensured. The main reasons for the occurrence of underground mine’s instability come from the stress redistribution of previous mined-out activities, the existence of discontinuities and void space, and the influence of on-going mining activities, etc. In addition to these problems, if the underground mining is conducted near the slope surface, the influence of slope surface should be taken into account to that mining activities. Therefore, considering the importance of rock stability, the investigations on the strength of rock mass near the slope surface are carried out and stability of advancing stope with previous mined-out activities are conducted at Modi Taung gold mine, one of the largest underground gold mines in Myanmar. From the preliminary outcome of this research, the rock mass near the slope surface can be more subjected by differential stress than inside of the rock mass. This result indicates that the condition of rock mass near slope surface is more unstable than that of the places far from slope surface. Moreover, the results highlight that the potential buckling failures from hanging wall and foot wall are more severe than the roof falls from the stope in this mine site.

本文言語英語
ホスト出版物のタイトルProceedings of the 28th International Symposium on Mine Planning and Equipment Selection, MPES 2019
編集者Erkan Topal
出版社Springer
ページ479-487
ページ数9
ISBN(印刷版)9783030339531
DOI
出版ステータス出版済み - 2020
イベント28th International Symposium on Mine Planning and Equipment Selection, MPES 2019 - Perth, オーストラリア
継続期間: 12 2 201912 4 2019

出版物シリーズ

名前Springer Series in Geomechanics and Geoengineering
ISSN(印刷版)1866-8755
ISSN(電子版)1866-8763

会議

会議28th International Symposium on Mine Planning and Equipment Selection, MPES 2019
Countryオーストラリア
CityPerth
Period12/2/1912/4/19

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

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