Monitoring of a Rock Slope Using Crack Displacement Measurements in an Observation Drift at the Une Mine
Mt. Buko's rock slope has been formed by mining activity since 1973 and it will be 800 m high and 5 km long at the end of the mining operations. To manage the rock slope in a stable condition over the long term, mining companies operating at Mt. Buko have conducted numerical analysis of the...
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| Format: | Article |
| Language: | English |
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The Mining and Materials Processing Institute of Japan
2018-11-01
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| Series: | Journal of MMIJ |
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| Online Access: | https://www.jstage.jst.go.jp/article/journalofmmij/134/11/134_179/_pdf/-char/en |
| _version_ | 1797739752514912256 |
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| author | Hideo AOYAMA Kazufumi YANO Megumi KONDO Noriyoshi OZAWA Tsurugi NAKATANI |
| author_facet | Hideo AOYAMA Kazufumi YANO Megumi KONDO Noriyoshi OZAWA Tsurugi NAKATANI |
| author_sort | Hideo AOYAMA |
| collection | DOAJ |
| description | Mt. Buko's rock slope has been formed by mining activity since 1973 and it will be 800 m high and 5 km long at the end of the mining operations. To manage the rock slope in a stable condition over the long term, mining companies operating at Mt. Buko have conducted numerical analysis of the rock mass and installation of various monitoring devices, such as APS (Automated Polar System) and GPS (Global Positioning System), on the slope surface. APS measurements have shown a sudden and obvious displacement of a section of the rock slope of Une Mine that likely occurred during heavy rainfall in September 2007. This was a different behavior pattern from the expected elastic deformation. It was clarified that displacement measurements in the rock slope, in addition to slope surface measurements, were important for understanding the overall behavior of the rock mass and for determining effective countermeasures for the displacement. In 2008, an observation drift was excavated in the center of the displacement. Measurements of the rock mass were taken along a 307m long observation drift using several crack gages and a total station. Analysis of the long-term monitoring data in the drift has shown that the displacement inside the rock mass corresponded to the data obtained by APS and GPS. Moreover, measurements in the drift were much more stable (showing high accuracy and reliability) than those on the surface, which tended to be affected by meteorological conditions such as lightning, heavy rain and dense fog. |
| first_indexed | 2024-03-12T14:01:44Z |
| format | Article |
| id | doaj.art-5491249423604e0ba86b6d0384e1df05 |
| institution | Directory Open Access Journal |
| issn | 1881-6118 1884-0450 |
| language | English |
| last_indexed | 2024-03-12T14:01:44Z |
| publishDate | 2018-11-01 |
| publisher | The Mining and Materials Processing Institute of Japan |
| record_format | Article |
| series | Journal of MMIJ |
| spelling | doaj.art-5491249423604e0ba86b6d0384e1df052023-08-22T04:03:37ZengThe Mining and Materials Processing Institute of JapanJournal of MMIJ1881-61181884-04502018-11-011341117918710.2473/journalofmmij.134.179journalofmmijMonitoring of a Rock Slope Using Crack Displacement Measurements in an Observation Drift at the Une MineHideo AOYAMA0Kazufumi YANO1Megumi KONDO2Noriyoshi OZAWA3Tsurugi NAKATANI4Mitsubishi Materials CorporationMitsubishi Materials CorporationMitsubishi Materials CorporationRyokolime Industry Co., Ltd.Ryokolime Industry Co., Ltd.Mt. Buko's rock slope has been formed by mining activity since 1973 and it will be 800 m high and 5 km long at the end of the mining operations. To manage the rock slope in a stable condition over the long term, mining companies operating at Mt. Buko have conducted numerical analysis of the rock mass and installation of various monitoring devices, such as APS (Automated Polar System) and GPS (Global Positioning System), on the slope surface. APS measurements have shown a sudden and obvious displacement of a section of the rock slope of Une Mine that likely occurred during heavy rainfall in September 2007. This was a different behavior pattern from the expected elastic deformation. It was clarified that displacement measurements in the rock slope, in addition to slope surface measurements, were important for understanding the overall behavior of the rock mass and for determining effective countermeasures for the displacement. In 2008, an observation drift was excavated in the center of the displacement. Measurements of the rock mass were taken along a 307m long observation drift using several crack gages and a total station. Analysis of the long-term monitoring data in the drift has shown that the displacement inside the rock mass corresponded to the data obtained by APS and GPS. Moreover, measurements in the drift were much more stable (showing high accuracy and reliability) than those on the surface, which tended to be affected by meteorological conditions such as lightning, heavy rain and dense fog.https://www.jstage.jst.go.jp/article/journalofmmij/134/11/134_179/_pdf/-char/enobservation driftcrack gagerock slope monitoring in rock mass |
| spellingShingle | Hideo AOYAMA Kazufumi YANO Megumi KONDO Noriyoshi OZAWA Tsurugi NAKATANI Monitoring of a Rock Slope Using Crack Displacement Measurements in an Observation Drift at the Une Mine Journal of MMIJ observation drift crack gage rock slope monitoring in rock mass |
| title | Monitoring of a Rock Slope Using Crack Displacement Measurements in an Observation Drift at the Une Mine |
| title_full | Monitoring of a Rock Slope Using Crack Displacement Measurements in an Observation Drift at the Une Mine |
| title_fullStr | Monitoring of a Rock Slope Using Crack Displacement Measurements in an Observation Drift at the Une Mine |
| title_full_unstemmed | Monitoring of a Rock Slope Using Crack Displacement Measurements in an Observation Drift at the Une Mine |
| title_short | Monitoring of a Rock Slope Using Crack Displacement Measurements in an Observation Drift at the Une Mine |
| title_sort | monitoring of a rock slope using crack displacement measurements in an observation drift at the une mine |
| topic | observation drift crack gage rock slope monitoring in rock mass |
| url | https://www.jstage.jst.go.jp/article/journalofmmij/134/11/134_179/_pdf/-char/en |
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