Safe and Efficient Coal Mining Below the Goaf: A Case Study
Mining at the fully mechanized working face below the goaf of the short-distance coal seam is influenced by the upper goaf. To address this problem, methods such as theoretical analyses, numerical simulation, and on-site measurement are used to study the strata behavior characteristics of the Ningxi...
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doaj-60618205acab4ea0a44ab63929d005d62020-11-25T01:40:00ZengMDPI AGEnergies1996-10732020-02-0113486410.3390/en13040864en13040864Safe and Efficient Coal Mining Below the Goaf: A Case StudyWeidong Pan0Shaopeng Zhang1Yi Liu2School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaMining at the fully mechanized working face below the goaf of the short-distance coal seam is influenced by the upper goaf. To address this problem, methods such as theoretical analyses, numerical simulation, and on-site measurement are used to study the strata behavior characteristics of the Ningxia Lingxin Coal Mine 051508 working face in this study. The roof weighting intervals of the working faces below the goaf and the non-goaf are obtained via theoretical calculations. The stoping processes of the working faces below the goaf and the non-goaf are simulated with FLAC<sup>3D</sup> to obtain the distribution law of the bearing pressure and plastic zones before the working face. Based on the statistical analysis of the measured working resistance of the supports and its distribution, the roof weighting interval of the working face mining below the goaf is obtained. The results show that the roof weighting interval and the advanced abutment pressure during mining at the working face below the goaf are smaller than those below the non-goaf, providing a reasonable theoretical basis for mining below the goaf, and having important significance for safe and efficient mining.https://www.mdpi.com/1996-1073/13/4/864short distancemulti-coal seamfully mechanized working facenumerical simulationsafe and efficient mining |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Weidong Pan Shaopeng Zhang Yi Liu |
spellingShingle |
Weidong Pan Shaopeng Zhang Yi Liu Safe and Efficient Coal Mining Below the Goaf: A Case Study Energies short distance multi-coal seam fully mechanized working face numerical simulation safe and efficient mining |
author_facet |
Weidong Pan Shaopeng Zhang Yi Liu |
author_sort |
Weidong Pan |
title |
Safe and Efficient Coal Mining Below the Goaf: A Case Study |
title_short |
Safe and Efficient Coal Mining Below the Goaf: A Case Study |
title_full |
Safe and Efficient Coal Mining Below the Goaf: A Case Study |
title_fullStr |
Safe and Efficient Coal Mining Below the Goaf: A Case Study |
title_full_unstemmed |
Safe and Efficient Coal Mining Below the Goaf: A Case Study |
title_sort |
safe and efficient coal mining below the goaf: a case study |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2020-02-01 |
description |
Mining at the fully mechanized working face below the goaf of the short-distance coal seam is influenced by the upper goaf. To address this problem, methods such as theoretical analyses, numerical simulation, and on-site measurement are used to study the strata behavior characteristics of the Ningxia Lingxin Coal Mine 051508 working face in this study. The roof weighting intervals of the working faces below the goaf and the non-goaf are obtained via theoretical calculations. The stoping processes of the working faces below the goaf and the non-goaf are simulated with FLAC<sup>3D</sup> to obtain the distribution law of the bearing pressure and plastic zones before the working face. Based on the statistical analysis of the measured working resistance of the supports and its distribution, the roof weighting interval of the working face mining below the goaf is obtained. The results show that the roof weighting interval and the advanced abutment pressure during mining at the working face below the goaf are smaller than those below the non-goaf, providing a reasonable theoretical basis for mining below the goaf, and having important significance for safe and efficient mining. |
topic |
short distance multi-coal seam fully mechanized working face numerical simulation safe and efficient mining |
url |
https://www.mdpi.com/1996-1073/13/4/864 |
work_keys_str_mv |
AT weidongpan safeandefficientcoalminingbelowthegoafacasestudy AT shaopengzhang safeandefficientcoalminingbelowthegoafacasestudy AT yiliu safeandefficientcoalminingbelowthegoafacasestudy |
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