Research on the Extraction Technology of Gas-Integrated Working-Face in Close Coal Seam Mining in Permafrost Area
In order to understand the mechanical deformation characteristics of the permafrost layer and the stress-fracture-gas seepage law of the superimposed mining of the proximity coal seam group, a coupled gas-solid model of the proximity coal seam in the permafrost area was constructed based on the theo...
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ftdoajarticles:oai:doaj.org/article:a3d5d70b49a342edb6d5c851ff82a635 2024-09-15T18:29:41+00:00 Research on the Extraction Technology of Gas-Integrated Working-Face in Close Coal Seam Mining in Permafrost Area Chao Wu Rongbin Deng 2022-01-01T00:00:00Z https://doi.org/10.1155/2022/2379040 https://doaj.org/article/a3d5d70b49a342edb6d5c851ff82a635 EN eng Wiley http://dx.doi.org/10.1155/2022/2379040 https://doaj.org/toc/1468-8123 1468-8123 doi:10.1155/2022/2379040 https://doaj.org/article/a3d5d70b49a342edb6d5c851ff82a635 Geofluids, Vol 2022 (2022) Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.1155/2022/2379040 2024-08-05T17:48:40Z In order to understand the mechanical deformation characteristics of the permafrost layer and the stress-fracture-gas seepage law of the superimposed mining of the proximity coal seam group, a coupled gas-solid model of the proximity coal seam in the permafrost area was constructed based on the theoretical model of small deflection of thin plate and the deformation control equation, gas transport equation, porosity evolution equation and permeability evolution equation of the coal rock body, and the analysis of the dependent project. The analysis was carried out at the NMT coal mine. The results show that the multiyear permafrost seam in the NMT coal mine has a tendency to move to the left and will produce extensive pull damage near the right end. The initial and periodic collapse steps are 192.87 m and 43.24 m, respectively; the pore and fissure structural characteristics of the NMT coal seam are not conducive to gas transport, and the stress and fissure fields have a nonlinear increasing effect. The study also proposed the “protected seam mining and bottom extraction lane directional drilling group comining technology” to increase the daily production of working face by 25.8%. The results of the study can be used as a reference for similar projects. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Geofluids 2022 1 15 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
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Geology QE1-996.5 Chao Wu Rongbin Deng Research on the Extraction Technology of Gas-Integrated Working-Face in Close Coal Seam Mining in Permafrost Area |
topic_facet |
Geology QE1-996.5 |
description |
In order to understand the mechanical deformation characteristics of the permafrost layer and the stress-fracture-gas seepage law of the superimposed mining of the proximity coal seam group, a coupled gas-solid model of the proximity coal seam in the permafrost area was constructed based on the theoretical model of small deflection of thin plate and the deformation control equation, gas transport equation, porosity evolution equation and permeability evolution equation of the coal rock body, and the analysis of the dependent project. The analysis was carried out at the NMT coal mine. The results show that the multiyear permafrost seam in the NMT coal mine has a tendency to move to the left and will produce extensive pull damage near the right end. The initial and periodic collapse steps are 192.87 m and 43.24 m, respectively; the pore and fissure structural characteristics of the NMT coal seam are not conducive to gas transport, and the stress and fissure fields have a nonlinear increasing effect. The study also proposed the “protected seam mining and bottom extraction lane directional drilling group comining technology” to increase the daily production of working face by 25.8%. The results of the study can be used as a reference for similar projects. |
format |
Article in Journal/Newspaper |
author |
Chao Wu Rongbin Deng |
author_facet |
Chao Wu Rongbin Deng |
author_sort |
Chao Wu |
title |
Research on the Extraction Technology of Gas-Integrated Working-Face in Close Coal Seam Mining in Permafrost Area |
title_short |
Research on the Extraction Technology of Gas-Integrated Working-Face in Close Coal Seam Mining in Permafrost Area |
title_full |
Research on the Extraction Technology of Gas-Integrated Working-Face in Close Coal Seam Mining in Permafrost Area |
title_fullStr |
Research on the Extraction Technology of Gas-Integrated Working-Face in Close Coal Seam Mining in Permafrost Area |
title_full_unstemmed |
Research on the Extraction Technology of Gas-Integrated Working-Face in Close Coal Seam Mining in Permafrost Area |
title_sort |
research on the extraction technology of gas-integrated working-face in close coal seam mining in permafrost area |
publisher |
Wiley |
publishDate |
2022 |
url |
https://doi.org/10.1155/2022/2379040 https://doaj.org/article/a3d5d70b49a342edb6d5c851ff82a635 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Geofluids, Vol 2022 (2022) |
op_relation |
http://dx.doi.org/10.1155/2022/2379040 https://doaj.org/toc/1468-8123 1468-8123 doi:10.1155/2022/2379040 https://doaj.org/article/a3d5d70b49a342edb6d5c851ff82a635 |
op_doi |
https://doi.org/10.1155/2022/2379040 |
container_title |
Geofluids |
container_volume |
2022 |
container_start_page |
1 |
op_container_end_page |
15 |
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1810471115418501120 |