Large-scale laboratory investigation of pillar-support interaction
Underground mine pillars provide natural stability to the mine area, allowing safe operations for workers and machinery. Extensive prior research has been conducted to understand pillar failure mechanics and design safe pillar layouts. However, limited studies (mostly based on empirical field observ...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674775524002312 |
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| author | Akash Chaurasia Gabriel Walton Sankhaneel Sinha Timothy J. Batchler Kieran Moore Nicholas Vlachopoulos Bradley Forbes |
| author_facet | Akash Chaurasia Gabriel Walton Sankhaneel Sinha Timothy J. Batchler Kieran Moore Nicholas Vlachopoulos Bradley Forbes |
| author_sort | Akash Chaurasia |
| collection | DOAJ |
| description | Underground mine pillars provide natural stability to the mine area, allowing safe operations for workers and machinery. Extensive prior research has been conducted to understand pillar failure mechanics and design safe pillar layouts. However, limited studies (mostly based on empirical field observation and small-scale laboratory tests) have considered pillar-support interactions under monotonic loading conditions for the design of pillar-support systems. This study used a series of large-scale laboratory compression tests on porous limestone blocks to analyze rock and support behavior at a sufficiently large scale (specimens with edge length of 0.5 m) for incorporation of actual support elements, with consideration of different w/h ratios. Both unsupported and supported (grouted rebar rockbolt and wire mesh) tests were conducted, and the surface deformations of the specimens were monitored using three-dimensional (3D) digital image correlation (DIC). Rockbolts instrumented with distributed fiber optic strain sensors were used to study rockbolt strain distribution, load mobilization, and localized deformation at different w/h ratios. Both axial and bending strains were observed in the rockbolts, which became more prominent in the post-peak region of the stress-strain curve. |
| format | Article |
| id | doaj-art-e052b79664564f19af5d0c95b1945721 |
| institution | Kabale University |
| issn | 1674-7755 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj-art-e052b79664564f19af5d0c95b19457212025-01-17T04:49:08ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552025-01-011717193Large-scale laboratory investigation of pillar-support interactionAkash Chaurasia0Gabriel Walton1Sankhaneel Sinha2Timothy J. Batchler3Kieran Moore4Nicholas Vlachopoulos5Bradley Forbes6Colorado School of Mines, Golden, CO, USA; Corresponding author.Colorado School of Mines, Golden, CO, USAColorado School of Mines, Golden, CO, USA; Equilibrium Mining, Kolkata, West Bengal, IndiaNational Institute of Occupational and Safety Hazard (NIOSH), Pittsburgh, PA, USARoyal Military College of Canada (RMC), Kingston, Ontario, CanadaRoyal Military College of Canada (RMC), Kingston, Ontario, CanadaBGC Engineering Inc., Kingston, Ontario, CanadaUnderground mine pillars provide natural stability to the mine area, allowing safe operations for workers and machinery. Extensive prior research has been conducted to understand pillar failure mechanics and design safe pillar layouts. However, limited studies (mostly based on empirical field observation and small-scale laboratory tests) have considered pillar-support interactions under monotonic loading conditions for the design of pillar-support systems. This study used a series of large-scale laboratory compression tests on porous limestone blocks to analyze rock and support behavior at a sufficiently large scale (specimens with edge length of 0.5 m) for incorporation of actual support elements, with consideration of different w/h ratios. Both unsupported and supported (grouted rebar rockbolt and wire mesh) tests were conducted, and the surface deformations of the specimens were monitored using three-dimensional (3D) digital image correlation (DIC). Rockbolts instrumented with distributed fiber optic strain sensors were used to study rockbolt strain distribution, load mobilization, and localized deformation at different w/h ratios. Both axial and bending strains were observed in the rockbolts, which became more prominent in the post-peak region of the stress-strain curve.http://www.sciencedirect.com/science/article/pii/S1674775524002312Grouted rockboltWelded wire meshPorous limestoneDigital image correlationDistributed fiber optic sensingLarge-scale laboratory tests |
| spellingShingle | Akash Chaurasia Gabriel Walton Sankhaneel Sinha Timothy J. Batchler Kieran Moore Nicholas Vlachopoulos Bradley Forbes Large-scale laboratory investigation of pillar-support interaction Journal of Rock Mechanics and Geotechnical Engineering Grouted rockbolt Welded wire mesh Porous limestone Digital image correlation Distributed fiber optic sensing Large-scale laboratory tests |
| title | Large-scale laboratory investigation of pillar-support interaction |
| title_full | Large-scale laboratory investigation of pillar-support interaction |
| title_fullStr | Large-scale laboratory investigation of pillar-support interaction |
| title_full_unstemmed | Large-scale laboratory investigation of pillar-support interaction |
| title_short | Large-scale laboratory investigation of pillar-support interaction |
| title_sort | large scale laboratory investigation of pillar support interaction |
| topic | Grouted rockbolt Welded wire mesh Porous limestone Digital image correlation Distributed fiber optic sensing Large-scale laboratory tests |
| url | http://www.sciencedirect.com/science/article/pii/S1674775524002312 |
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