Technical Aspects of Mining Rate Improvement in Steeply Inclined Coal Seams: A Case Study
This paper presents our experience obtained when mining the thick and steeply-inclined Seam 510 in the Polish Kazimierz-Juliusz coal mine with the use of a unique mechanical face mining system. Seam 510, which is 15–20 m thick and inclined at angles of 40°–45°, was initially treated as uneconomical...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-11-01
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| Series: | Resources |
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| Online Access: | https://www.mdpi.com/2079-9276/9/12/138 |
| _version_ | 1797546908509536256 |
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| author | Zbigniew Rak Jerzy Stasica Zbigniew Burtan Dariusz Chlebowski |
| author_facet | Zbigniew Rak Jerzy Stasica Zbigniew Burtan Dariusz Chlebowski |
| author_sort | Zbigniew Rak |
| collection | DOAJ |
| description | This paper presents our experience obtained when mining the thick and steeply-inclined Seam 510 in the Polish Kazimierz-Juliusz coal mine with the use of a unique mechanical face mining system. Seam 510, which is 15–20 m thick and inclined at angles of 40°–45°, was initially treated as uneconomical because effective mining systems were not available. However, to extract high-quality coal resources, a completely mechanized variant of the sublevel caving system was designed based on standard machines and equipment applied in coal mining. Extraction was conducted top-down at the levels of the particular mining sub-level drifts with roof caving. The faces in the extracted coal release areas were protected by a single pair of specially designed mechanized mining system sections. One of the basic problems revealed during extraction of subsequent mining panels, was the observed changeability of the resource mining rates. The extraction losses changed in the available resources from less than 10% to about 50%. This paper presents two typical courses of changes in the extractable resource mining rates. Similar rate changes occurred in both cases with continued mining of a single seam section. Our analysis enabled deposit loss estimations and production output planning under the sublevel caving systems applied in the extraction of seam deposits of similar structure. |
| first_indexed | 2024-03-10T14:37:03Z |
| format | Article |
| id | doaj.art-87ff6952d48f42dc979667ce93624e64 |
| institution | Directory Open Access Journal |
| issn | 2079-9276 |
| language | English |
| last_indexed | 2024-03-10T14:37:03Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Resources |
| spelling | doaj.art-87ff6952d48f42dc979667ce93624e642023-11-20T22:08:07ZengMDPI AGResources2079-92762020-11-0191213810.3390/resources9120138Technical Aspects of Mining Rate Improvement in Steeply Inclined Coal Seams: A Case StudyZbigniew Rak0Jerzy Stasica1Zbigniew Burtan2Dariusz Chlebowski3Faculty of Mining and Geoengineering, AGH University of Science and Technology, 30-059 Kraków, PolandFaculty of Mining and Geoengineering, AGH University of Science and Technology, 30-059 Kraków, PolandFaculty of Mining and Geoengineering, AGH University of Science and Technology, 30-059 Kraków, PolandFaculty of Mining and Geoengineering, AGH University of Science and Technology, 30-059 Kraków, PolandThis paper presents our experience obtained when mining the thick and steeply-inclined Seam 510 in the Polish Kazimierz-Juliusz coal mine with the use of a unique mechanical face mining system. Seam 510, which is 15–20 m thick and inclined at angles of 40°–45°, was initially treated as uneconomical because effective mining systems were not available. However, to extract high-quality coal resources, a completely mechanized variant of the sublevel caving system was designed based on standard machines and equipment applied in coal mining. Extraction was conducted top-down at the levels of the particular mining sub-level drifts with roof caving. The faces in the extracted coal release areas were protected by a single pair of specially designed mechanized mining system sections. One of the basic problems revealed during extraction of subsequent mining panels, was the observed changeability of the resource mining rates. The extraction losses changed in the available resources from less than 10% to about 50%. This paper presents two typical courses of changes in the extractable resource mining rates. Similar rate changes occurred in both cases with continued mining of a single seam section. Our analysis enabled deposit loss estimations and production output planning under the sublevel caving systems applied in the extraction of seam deposits of similar structure.https://www.mdpi.com/2079-9276/9/12/138coal miningthick and steep coal bedssublevel cavingextraction effectivenessdeposit extraction rate |
| spellingShingle | Zbigniew Rak Jerzy Stasica Zbigniew Burtan Dariusz Chlebowski Technical Aspects of Mining Rate Improvement in Steeply Inclined Coal Seams: A Case Study Resources coal mining thick and steep coal beds sublevel caving extraction effectiveness deposit extraction rate |
| title | Technical Aspects of Mining Rate Improvement in Steeply Inclined Coal Seams: A Case Study |
| title_full | Technical Aspects of Mining Rate Improvement in Steeply Inclined Coal Seams: A Case Study |
| title_fullStr | Technical Aspects of Mining Rate Improvement in Steeply Inclined Coal Seams: A Case Study |
| title_full_unstemmed | Technical Aspects of Mining Rate Improvement in Steeply Inclined Coal Seams: A Case Study |
| title_short | Technical Aspects of Mining Rate Improvement in Steeply Inclined Coal Seams: A Case Study |
| title_sort | technical aspects of mining rate improvement in steeply inclined coal seams a case study |
| topic | coal mining thick and steep coal beds sublevel caving extraction effectiveness deposit extraction rate |
| url | https://www.mdpi.com/2079-9276/9/12/138 |
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