Decrease in coal losses during mining of contiguous seams in the near-bottom part at Vorkuta deposit
The problem of formation of extended zones with high rock pressure (HRP) from safety pillars at the boundaries of extraction pillars formed due to the mine layout of complex geometry is considered at the example of JSC Vorkutaugol mines. A detailed analysis of the remaining reserves of the near-bott...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Saint-Petersburg Mining University
2020-10-01
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| Series: | Записки Горного института |
| Subjects: | |
| Online Access: | https://pmi.spmi.ru/index.php/pmi/article/view/13576?setLocale=en_US |
| _version_ | 1797947211546361856 |
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| author | Oleg I. Kazanin Valeriy V. Yaroshenko |
| author_facet | Oleg I. Kazanin Valeriy V. Yaroshenko |
| author_sort | Oleg I. Kazanin |
| collection | DOAJ |
| description | The problem of formation of extended zones with high rock pressure (HRP) from safety pillars at the boundaries of extraction pillars formed due to the mine layout of complex geometry is considered at the example of JSC Vorkutaugol mines. A detailed analysis of the remaining reserves of the near-bottom part of the deposit was carried out to estimate losses and the impact of HRP zones from the Chetvertyi protective seam to mining operations on the Troinoi upper seam along with the possibilities for the reduction of sizes of HRP zones at the account of expanding the underworked space. Due to research on the near-bottom part of the Vorkuta deposit, within the framework of the accepted layout, a zone at the Komsomolskaya mine and two zones at the Zapolyarnaya-2 mine were singled out, at which losses at the boundaries of the extraction pillars amount up to 13-22 % of the total resources of the mine field. The high volume of losses in these pillars indicates the relevance of research on the priority extraction impact of protective seams on the efficiency and safety of mining operations in the working area of underworked and HRP zones. Based on the analysis of foreign and Russian experience in the pillar cleaning-up at the boundaries of working areas and the methodical guidelines and instructions, a technological scheme was developed that allows increasing the coal mining recovery factor in the near-bottom part of the Vorkuta deposit from 0.75 to 0.9 without fundamental changing of the ventilation and transport networks and also without purchasing any additional mining equipment.
The conducted economic calculations confirmed the effectiveness of implementing the new technological scheme for cleaning-up reserves at the boundaries of extraction districts. The economic effect is from 0.079 to1.381 billion rubles of additional profit from coaxial extraction pillars, depending on the mining and geological conditions and the size of the pillars. |
| first_indexed | 2024-04-10T21:24:15Z |
| format | Article |
| id | doaj.art-bcbe6097d1a54a84b4fbe41764bff663 |
| institution | Directory Open Access Journal |
| issn | 2411-3336 2541-9404 |
| language | English |
| last_indexed | 2024-04-10T21:24:15Z |
| publishDate | 2020-10-01 |
| publisher | Saint-Petersburg Mining University |
| record_format | Article |
| series | Записки Горного института |
| spelling | doaj.art-bcbe6097d1a54a84b4fbe41764bff6632023-01-20T02:04:54ZengSaint-Petersburg Mining UniversityЗаписки Горного института2411-33362541-94042020-10-0124439540110.31897/pmi.2020.4.113576Decrease in coal losses during mining of contiguous seams in the near-bottom part at Vorkuta depositOleg I. Kazanin0https://orcid.org/0000-0001-9663-6713Valeriy V. Yaroshenko1https://orcid.org/0000-0003-2663-3300Saint Petersburg Mining UniversitySaint Petersburg Mining UniversityThe problem of formation of extended zones with high rock pressure (HRP) from safety pillars at the boundaries of extraction pillars formed due to the mine layout of complex geometry is considered at the example of JSC Vorkutaugol mines. A detailed analysis of the remaining reserves of the near-bottom part of the deposit was carried out to estimate losses and the impact of HRP zones from the Chetvertyi protective seam to mining operations on the Troinoi upper seam along with the possibilities for the reduction of sizes of HRP zones at the account of expanding the underworked space. Due to research on the near-bottom part of the Vorkuta deposit, within the framework of the accepted layout, a zone at the Komsomolskaya mine and two zones at the Zapolyarnaya-2 mine were singled out, at which losses at the boundaries of the extraction pillars amount up to 13-22 % of the total resources of the mine field. The high volume of losses in these pillars indicates the relevance of research on the priority extraction impact of protective seams on the efficiency and safety of mining operations in the working area of underworked and HRP zones. Based on the analysis of foreign and Russian experience in the pillar cleaning-up at the boundaries of working areas and the methodical guidelines and instructions, a technological scheme was developed that allows increasing the coal mining recovery factor in the near-bottom part of the Vorkuta deposit from 0.75 to 0.9 without fundamental changing of the ventilation and transport networks and also without purchasing any additional mining equipment. The conducted economic calculations confirmed the effectiveness of implementing the new technological scheme for cleaning-up reserves at the boundaries of extraction districts. The economic effect is from 0.079 to1.381 billion rubles of additional profit from coaxial extraction pillars, depending on the mining and geological conditions and the size of the pillars.https://pmi.spmi.ru/index.php/pmi/article/view/13576?setLocale=en_USpillarlossescontiguous seamshigh rock pressuretechnological schemesvorkuta depositextraction districtunderworked zones |
| spellingShingle | Oleg I. Kazanin Valeriy V. Yaroshenko Decrease in coal losses during mining of contiguous seams in the near-bottom part at Vorkuta deposit Записки Горного института pillar losses contiguous seams high rock pressure technological schemes vorkuta deposit extraction district underworked zones |
| title | Decrease in coal losses during mining of contiguous seams in the near-bottom part at Vorkuta deposit |
| title_full | Decrease in coal losses during mining of contiguous seams in the near-bottom part at Vorkuta deposit |
| title_fullStr | Decrease in coal losses during mining of contiguous seams in the near-bottom part at Vorkuta deposit |
| title_full_unstemmed | Decrease in coal losses during mining of contiguous seams in the near-bottom part at Vorkuta deposit |
| title_short | Decrease in coal losses during mining of contiguous seams in the near-bottom part at Vorkuta deposit |
| title_sort | decrease in coal losses during mining of contiguous seams in the near bottom part at vorkuta deposit |
| topic | pillar losses contiguous seams high rock pressure technological schemes vorkuta deposit extraction district underworked zones |
| url | https://pmi.spmi.ru/index.php/pmi/article/view/13576?setLocale=en_US |
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