The effect of the intermediate principal stress on pillar strength
Abstract Room and pillar mining is an underground mining method that utilizes natural pillar support to control rock mass behavior, ensuring mine stability and a safe mine environment. This study specifically documents the influence of the intermediate principal stress component on the pillar behavi...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-02-01
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| Series: | International Journal of Coal Science & Technology |
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| Online Access: | https://doi.org/10.1007/s40789-025-00747-8 |
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| author | Duncan Maina Heinz Konietzky |
| author_facet | Duncan Maina Heinz Konietzky |
| author_sort | Duncan Maina |
| collection | DOAJ |
| description | Abstract Room and pillar mining is an underground mining method that utilizes natural pillar support to control rock mass behavior, ensuring mine stability and a safe mine environment. This study specifically documents the influence of the intermediate principal stress component on the pillar behavior. So far only classical failure criteria ignoring the influence of the intermediate principal stress component were used for underground pillar design. By using an extended Hoek–Brown failure criterion in comparison with the classical Hoek–Brown failure criterion, the influence of the intermediate principal stress component is documented by indicating those areas where the failure criterion is violated. This study demonstrates, that depending on the rock type, the intermediate principal stress component can have a significant effect. Ignoring this influence can lead to uneconomic pillar design and incorrect determination of the factor of safety. |
| format | Article |
| id | doaj-art-f8bfaf07069942dd8bfe8c471fcf0aba |
| institution | Kabale University |
| issn | 2095-8293 2198-7823 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Coal Science & Technology |
| spelling | doaj-art-f8bfaf07069942dd8bfe8c471fcf0aba2025-02-09T12:04:41ZengSpringerOpenInternational Journal of Coal Science & Technology2095-82932198-78232025-02-011211710.1007/s40789-025-00747-8The effect of the intermediate principal stress on pillar strengthDuncan Maina0Heinz Konietzky1Geotechnical Institute, TU Bergakademie FreibergGeotechnical Institute, TU Bergakademie FreibergAbstract Room and pillar mining is an underground mining method that utilizes natural pillar support to control rock mass behavior, ensuring mine stability and a safe mine environment. This study specifically documents the influence of the intermediate principal stress component on the pillar behavior. So far only classical failure criteria ignoring the influence of the intermediate principal stress component were used for underground pillar design. By using an extended Hoek–Brown failure criterion in comparison with the classical Hoek–Brown failure criterion, the influence of the intermediate principal stress component is documented by indicating those areas where the failure criterion is violated. This study demonstrates, that depending on the rock type, the intermediate principal stress component can have a significant effect. Ignoring this influence can lead to uneconomic pillar design and incorrect determination of the factor of safety.https://doi.org/10.1007/s40789-025-00747-8Hoek–Brown failure criterionIntermediate principal stress componentPillar StrengthRoom and pillar mining |
| spellingShingle | Duncan Maina Heinz Konietzky The effect of the intermediate principal stress on pillar strength International Journal of Coal Science & Technology Hoek–Brown failure criterion Intermediate principal stress component Pillar Strength Room and pillar mining |
| title | The effect of the intermediate principal stress on pillar strength |
| title_full | The effect of the intermediate principal stress on pillar strength |
| title_fullStr | The effect of the intermediate principal stress on pillar strength |
| title_full_unstemmed | The effect of the intermediate principal stress on pillar strength |
| title_short | The effect of the intermediate principal stress on pillar strength |
| title_sort | effect of the intermediate principal stress on pillar strength |
| topic | Hoek–Brown failure criterion Intermediate principal stress component Pillar Strength Room and pillar mining |
| url | https://doi.org/10.1007/s40789-025-00747-8 |
| work_keys_str_mv | AT duncanmaina theeffectoftheintermediateprincipalstressonpillarstrength AT heinzkonietzky theeffectoftheintermediateprincipalstressonpillarstrength AT duncanmaina effectoftheintermediateprincipalstressonpillarstrength AT heinzkonietzky effectoftheintermediateprincipalstressonpillarstrength |