Numerical modelling approach for estimation of a yield zone in the face of a deep longwall panel
Abstract In the Longwall mining method, the coal face is being supported with two-legged or four-legged shield supports which improve better roof control between the face and canopy tip. The development of load on the face increases with the face retreating rate or the increase of the overhung lengt...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-47683-8 |
| _version_ | 1797415091227852800 |
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| author | Sreenivasa Rao Islavath |
| author_facet | Sreenivasa Rao Islavath |
| author_sort | Sreenivasa Rao Islavath |
| collection | DOAJ |
| description | Abstract In the Longwall mining method, the coal face is being supported with two-legged or four-legged shield supports which improve better roof control between the face and canopy tip. The development of load on the face increases with the face retreating rate or the increase of the overhung length behind the shield support and as a result, the coal face tends to yield/fail. The yield/failure zone in the face extends depending on intensity of developed load due to the depth of mining, panel size, height of excavation and geometry of the overhung. The broken coal from the yielded face may fall on the shearer, armoured flexible conveyor (AFC), shield supports or may hit the deployed manpower in the face and causes the face stoppage which in turn results in to the loss of the project. It is therefore, a study is conducted to understand the face yield/failure behaviour considering various geo-mining conditions based on input parameters such as main roof thickness, overhung length, and material type and setting load. This paper develops a unique statistical model to predict the yield/failure zone in the longwall face. For this purpose, a total of fifty-four (54) three-dimensional finite element models in ANSYS software are developed and analyzed considering Drucker-Prager failure criterion. |
| first_indexed | 2024-03-09T05:43:02Z |
| format | Article |
| id | doaj.art-49812c2770384dc185a9582a1bef0cf8 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-09T05:43:02Z |
| publishDate | 2023-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-49812c2770384dc185a9582a1bef0cf82023-12-03T12:23:05ZengNature PortfolioScientific Reports2045-23222023-11-0113111310.1038/s41598-023-47683-8Numerical modelling approach for estimation of a yield zone in the face of a deep longwall panelSreenivasa Rao Islavath0Department of Mining Engineering, Indian Institute of Technology KharagpurAbstract In the Longwall mining method, the coal face is being supported with two-legged or four-legged shield supports which improve better roof control between the face and canopy tip. The development of load on the face increases with the face retreating rate or the increase of the overhung length behind the shield support and as a result, the coal face tends to yield/fail. The yield/failure zone in the face extends depending on intensity of developed load due to the depth of mining, panel size, height of excavation and geometry of the overhung. The broken coal from the yielded face may fall on the shearer, armoured flexible conveyor (AFC), shield supports or may hit the deployed manpower in the face and causes the face stoppage which in turn results in to the loss of the project. It is therefore, a study is conducted to understand the face yield/failure behaviour considering various geo-mining conditions based on input parameters such as main roof thickness, overhung length, and material type and setting load. This paper develops a unique statistical model to predict the yield/failure zone in the longwall face. For this purpose, a total of fifty-four (54) three-dimensional finite element models in ANSYS software are developed and analyzed considering Drucker-Prager failure criterion.https://doi.org/10.1038/s41598-023-47683-8 |
| spellingShingle | Sreenivasa Rao Islavath Numerical modelling approach for estimation of a yield zone in the face of a deep longwall panel Scientific Reports |
| title | Numerical modelling approach for estimation of a yield zone in the face of a deep longwall panel |
| title_full | Numerical modelling approach for estimation of a yield zone in the face of a deep longwall panel |
| title_fullStr | Numerical modelling approach for estimation of a yield zone in the face of a deep longwall panel |
| title_full_unstemmed | Numerical modelling approach for estimation of a yield zone in the face of a deep longwall panel |
| title_short | Numerical modelling approach for estimation of a yield zone in the face of a deep longwall panel |
| title_sort | numerical modelling approach for estimation of a yield zone in the face of a deep longwall panel |
| url | https://doi.org/10.1038/s41598-023-47683-8 |
| work_keys_str_mv | AT sreenivasaraoislavath numericalmodellingapproachforestimationofayieldzoneinthefaceofadeeplongwallpanel |