Ground Stress Analysis and Automation of Workface in Continuous Mining Continuous Backfill Operation
The cost, complexity, lack of filling space and time create challenges in the longwall backfill operation, resulting in poor subsidence control and reduced productivity. This paper proposes an automated continuous mining and continuous backfill (CMCB) method by examining its key requirements and inv...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/12/6/754 |
| _version_ | 1797484131826794496 |
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| author | Seun A. Ajayi Liqiang Ma Anthony J. S. Spearing |
| author_facet | Seun A. Ajayi Liqiang Ma Anthony J. S. Spearing |
| author_sort | Seun A. Ajayi |
| collection | DOAJ |
| description | The cost, complexity, lack of filling space and time create challenges in the longwall backfill operation, resulting in poor subsidence control and reduced productivity. This paper proposes an automated continuous mining and continuous backfill (CMCB) method by examining its key requirements and investigates the optimum sequence of coal panel (such as drifts) excavation to ensure ground strata control at relatively high productivity. The automated CMCB adopts the highwall mining technique underground, which enables easier automation at the workface. A numerical simulation of the Changxing coal mine in China was undertaken, and five different sequences of coal excavation were investigated, using the automated CMCB excavation parameters (assuming a 4 m width cut, 5 m mining height for a 200 m long coal slice) to determine the optimum sequence of resource excavation. The plastic zones and vertical displacement across the five models were analyzed. Simulation results of the 5 m high coal seam excavation show that the odd-even slice (OES) mining sequence, which has a vertical ground displacement of 74 mm, is the most efficient excavation method, due to its effective stress redistribution and lower induced ground displacement. |
| first_indexed | 2024-03-09T22:58:07Z |
| format | Article |
| id | doaj.art-67394f31d15c401489343c8e67035442 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T22:58:07Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-67394f31d15c401489343c8e670354422023-11-23T18:07:19ZengMDPI AGMinerals2075-163X2022-06-0112675410.3390/min12060754Ground Stress Analysis and Automation of Workface in Continuous Mining Continuous Backfill OperationSeun A. Ajayi0Liqiang Ma1Anthony J. S. Spearing2Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaThe cost, complexity, lack of filling space and time create challenges in the longwall backfill operation, resulting in poor subsidence control and reduced productivity. This paper proposes an automated continuous mining and continuous backfill (CMCB) method by examining its key requirements and investigates the optimum sequence of coal panel (such as drifts) excavation to ensure ground strata control at relatively high productivity. The automated CMCB adopts the highwall mining technique underground, which enables easier automation at the workface. A numerical simulation of the Changxing coal mine in China was undertaken, and five different sequences of coal excavation were investigated, using the automated CMCB excavation parameters (assuming a 4 m width cut, 5 m mining height for a 200 m long coal slice) to determine the optimum sequence of resource excavation. The plastic zones and vertical displacement across the five models were analyzed. Simulation results of the 5 m high coal seam excavation show that the odd-even slice (OES) mining sequence, which has a vertical ground displacement of 74 mm, is the most efficient excavation method, due to its effective stress redistribution and lower induced ground displacement.https://www.mdpi.com/2075-163X/12/6/754continuous mining and continuous backfillinghighwall mininghydraulic supportrock strata stressunderground mining |
| spellingShingle | Seun A. Ajayi Liqiang Ma Anthony J. S. Spearing Ground Stress Analysis and Automation of Workface in Continuous Mining Continuous Backfill Operation Minerals continuous mining and continuous backfilling highwall mining hydraulic support rock strata stress underground mining |
| title | Ground Stress Analysis and Automation of Workface in Continuous Mining Continuous Backfill Operation |
| title_full | Ground Stress Analysis and Automation of Workface in Continuous Mining Continuous Backfill Operation |
| title_fullStr | Ground Stress Analysis and Automation of Workface in Continuous Mining Continuous Backfill Operation |
| title_full_unstemmed | Ground Stress Analysis and Automation of Workface in Continuous Mining Continuous Backfill Operation |
| title_short | Ground Stress Analysis and Automation of Workface in Continuous Mining Continuous Backfill Operation |
| title_sort | ground stress analysis and automation of workface in continuous mining continuous backfill operation |
| topic | continuous mining and continuous backfilling highwall mining hydraulic support rock strata stress underground mining |
| url | https://www.mdpi.com/2075-163X/12/6/754 |
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