LAPSE:2023.26344v1
Published Article
LAPSE:2023.26344v1
Numerical Analysis of Longwall Gate-Entry Stability under Weak Geological Condition: A Case Study of an Indonesian Coal Mine
April 3, 2023
Abstract
The present research primarily focuses on the investigation of gate-entry stability of longwall trial panel under weak geological condition in Indonesia coal mine by means of numerical analysis. This work aims at identifying appropriate roof support at 100 m and 150 m of depth during gate development. Due to depth depending competency of dominant rock, the stability of gate-entry at 100 m of depth can be optimized by leaving at least 1 m of remaining coal thickness (RCT) above and below the gate-entry. The appropriate support for the trial panel gate-entry is steel arch SS540 with 1 m and 0.5 m spacing for 100 m and 150 m of depth, respectively. The influence of panel excavation on gate-entry is also discussed. Regarding the aforementioned influence, the utilization of additional gate mobile support is recommended at least 10 m from the longwall face.
The present research primarily focuses on the investigation of gate-entry stability of longwall trial panel under weak geological condition in Indonesia coal mine by means of numerical analysis. This work aims at identifying appropriate roof support at 100 m and 150 m of depth during gate development. Due to depth depending competency of dominant rock, the stability of gate-entry at 100 m of depth can be optimized by leaving at least 1 m of remaining coal thickness (RCT) above and below the gate-entry. The appropriate support for the trial panel gate-entry is steel arch SS540 with 1 m and 0.5 m spacing for 100 m and 150 m of depth, respectively. The influence of panel excavation on gate-entry is also discussed. Regarding the aforementioned influence, the utilization of additional gate mobile support is recommended at least 10 m from the longwall face.
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Keywords
gate-entry stability, longwall mining, remaining coal thickness, weak geological condition
Subject
Suggested Citation
Sasaoka T, Mao P, Shimada H, Hamanaka A, Oya J. Numerical Analysis of Longwall Gate-Entry Stability under Weak Geological Condition: A Case Study of an Indonesian Coal Mine. (2023). LAPSE:2023.26344v1
Author Affiliations
Sasaoka T: Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan
Mao P: Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan; Department of Geo-Resources and Geotechnical Engineering, Institute of Technology of Cambodia, Phnom Penh 12150, Cambodia [ORCID]
Shimada H: Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan
Hamanaka A: Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan [ORCID]
Oya J: MM Nagata Coal Tech Co., Ltd., Tokyo 140-0002, Japan
Mao P: Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan; Department of Geo-Resources and Geotechnical Engineering, Institute of Technology of Cambodia, Phnom Penh 12150, Cambodia [ORCID]
Shimada H: Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan
Hamanaka A: Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan [ORCID]
Oya J: MM Nagata Coal Tech Co., Ltd., Tokyo 140-0002, Japan
Journal Name
Energies
Volume
13
Issue
18
Article Number
E4710
Year
2020
Publication Date
2020-09-10
ISSN
1996-1073
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PII: en13184710, Publication Type: Journal Article
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LAPSE:2023.26344v1
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https://doi.org/10.3390/en13184710
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