A Parametric Study of Blast Damage on Hard Rock Pillar Strength
Pillar stability is an important factor for safe working and from an economic standpoint in underground mines. This paper discusses the effect of blast damage on the strength of hard rock pillars using numerical models through a parametric study. The results indicate that blast damage has a signific...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-07-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/11/7/1901 |
| _version_ | 1828391625553870848 |
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| author | Kashi Vishwanath Jessu Anthony J. S. Spearing Mostafa Sharifzadeh |
| author_facet | Kashi Vishwanath Jessu Anthony J. S. Spearing Mostafa Sharifzadeh |
| author_sort | Kashi Vishwanath Jessu |
| collection | DOAJ |
| description | Pillar stability is an important factor for safe working and from an economic standpoint in underground mines. This paper discusses the effect of blast damage on the strength of hard rock pillars using numerical models through a parametric study. The results indicate that blast damage has a significant impact on the strength of pillars with larger width-to-height (W/H) ratios. The blast damage causes softening of the rock at the pillar boundaries leading to the yielding of the pillars in brittle fashion beyond the blast damage zones. The models show that the decrease in pillar strength as a consequence of blasting is inversely correlated with increasing pillar height at a constant W/H ratio. Inclined pillars are less susceptible to blast damage, and the damage on the inclined sides has a greater impact on pillar strength than on the normal sides. A methodology to analyze the blast damage on hard rock pillars using FLAC3D is presented herein. |
| first_indexed | 2024-12-10T07:05:34Z |
| format | Article |
| id | doaj.art-ff6ae5a0e09d41aa9632bf7b5d89deff |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-12-10T07:05:34Z |
| publishDate | 2018-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-ff6ae5a0e09d41aa9632bf7b5d89deff2022-12-22T01:58:12ZengMDPI AGEnergies1996-10732018-07-01117190110.3390/en11071901en11071901A Parametric Study of Blast Damage on Hard Rock Pillar StrengthKashi Vishwanath Jessu0Anthony J. S. Spearing1Mostafa Sharifzadeh2Western Australian School of Mines, Curtin University, Kalgoorlie, WA 6430, AustraliaWestern Australian School of Mines, Curtin University, Kalgoorlie, WA 6430, AustraliaWestern Australian School of Mines, Curtin University, Kalgoorlie, WA 6430, AustraliaPillar stability is an important factor for safe working and from an economic standpoint in underground mines. This paper discusses the effect of blast damage on the strength of hard rock pillars using numerical models through a parametric study. The results indicate that blast damage has a significant impact on the strength of pillars with larger width-to-height (W/H) ratios. The blast damage causes softening of the rock at the pillar boundaries leading to the yielding of the pillars in brittle fashion beyond the blast damage zones. The models show that the decrease in pillar strength as a consequence of blasting is inversely correlated with increasing pillar height at a constant W/H ratio. Inclined pillars are less susceptible to blast damage, and the damage on the inclined sides has a greater impact on pillar strength than on the normal sides. A methodology to analyze the blast damage on hard rock pillars using FLAC3D is presented herein.http://www.mdpi.com/1996-1073/11/7/1901blast damagedamage factorhard rock pillarsnumerical modeling |
| spellingShingle | Kashi Vishwanath Jessu Anthony J. S. Spearing Mostafa Sharifzadeh A Parametric Study of Blast Damage on Hard Rock Pillar Strength Energies blast damage damage factor hard rock pillars numerical modeling |
| title | A Parametric Study of Blast Damage on Hard Rock Pillar Strength |
| title_full | A Parametric Study of Blast Damage on Hard Rock Pillar Strength |
| title_fullStr | A Parametric Study of Blast Damage on Hard Rock Pillar Strength |
| title_full_unstemmed | A Parametric Study of Blast Damage on Hard Rock Pillar Strength |
| title_short | A Parametric Study of Blast Damage on Hard Rock Pillar Strength |
| title_sort | parametric study of blast damage on hard rock pillar strength |
| topic | blast damage damage factor hard rock pillars numerical modeling |
| url | http://www.mdpi.com/1996-1073/11/7/1901 |
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