Numerical analysis of longwall gate-entry stability under weak geological condition: A case study of an indonesian coal mine

Takashi Sasaoka; Pisith Mao; Hideki Shimada; Akihiro Hamanaka; Jiro Oya

doi:10.3390/en13184710

Numerical analysis of longwall gate-entry stability under weak geological condition: A case study of an indonesian coal mine

Takashi Sasaoka, Pisith Mao, Hideki Shimada, Akihiro Hamanaka, Jiro Oya

Earth Resources Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

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.

Original language	English
Article number	4710
Journal	Energies
Volume	13
Issue number	18
DOIs	https://doi.org/10.3390/en13184710
Publication status	Published - Sept 2020

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Energy (miscellaneous)
Control and Optimization
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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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.",

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Numerical analysis of longwall gate-entry stability under weak geological condition: A case study of an indonesian coal mine

Abstract

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