Published

2021-04-16

A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study

Análisis mecánico del riesgo de inestabilidad en los apoyos de un frente de trabajo en un filón de carbón espeso con ángulo de inmersión grande: estudio de caso

DOI:

https://doi.org/10.15446/esrj.v25n1.74167

Keywords:

Large dip angle, Thick coal seam, Support instability risk, Mechanical model, Control measures (en)
ángulo grande de inmersión, filón de carbón espeso, riesgo de inestabilidad de apoyo, modelo mecánico, medidas de control (es)

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Authors

  • Wei Zhang China University of Mining & Technology
  • Weisheng Zhang China University of Mining and Technology
  • Dongsheng Zhang China University of Mining and Technology
  • Dahong Qi China University of Mining & Technology
  • Ziming He China University of Mining & Technology

To ensure safe and high-efficiency mining in the coalface with large dip angle (LDA) and large mining height (LMH), it is important to study the support stability of the coalface under the corresponding conditions. This study is based on the #3up509 coalface of the Gaozhuang Coal Mine (GCM) affiliated with the Zaozhuang Mining Area (ZMA), for which the mechanical characteristics of support in the coalface with LDA and LMH are analyzed. On this basis, the mechanical models for support tilting and sliding in the coalface are developed. Then support stability along the strike of the coalface during the normal mining period (NMP) and special mining period (SMP) is analyzed. The results show that the critical support tilting resistance during the NMP is 52.2 kN, and the critical support sliding resistance is 183.75 kN, and for the SMP, the values are 2679 kN and 4425 kN, respectively. The use of a two-leg shield support, known as ZY6600-25.5/55 (its rated working resistance is 6600 kN), is investigated, which is proved reasonable for the coalface. The influencing factors of support stability along the strike include technical parameters of the support, mining geological conditions of the coalface and specific conditions during mining. Technical measures, such as installing interlock set to fasten support and adjustable lifting jack, increasing the setting load of the support, and optimizing the support displacement method, are taken to increase the overall support stability in the coalface. The initial aim for a safe and high-efficiency mining at the #3up509 coalface has been achieved through the aforementioned measures.

Estudiar la estabilidad del soporte de un frente de explotación carbonífero bajo las condiciones de un ángulo de inmersión grande (LDA) y una explotación minera alta (LMH) es esencial para garantizar la seguridad y la alta eficiencia minera. Este estudio se basa en el frente de trabajo número #3up509 de la Mina de Carbón Gaozhuang (GCM) afiliada al área minera de Zaozhuang. Los autores analizaron las características mecánicas de apoyo en un frente de trabajo que cumple con las condiciones LDA y LMH. Con esta base se desarrollaron los modelos mecánicos que permitan al apoyo deslizarse e inclinarse en el área del frente de trabajo. Luego, se analizó la estabilidad del apoyo en el rumbo del frente de trabajo durante un periodo normal de explotación (NMP) y en un período especial de explotación (SMP). Los resultados muestran que la resistencia crítica de la inclinación del apoyo durante el período NMP es de 52.2 kN, y la resistencia crítica del deslizamiento es de 183.75 kN. Y para el período SMP, los valores son 229,7 kN y 4425 kN. Además, se investigó el uso de un apoyo de escudo con dos pies, conocido como ZY6600-25.5/55 (su capacidad de resistencia está calculada en 6600 kN), que funciona bien en los frentes de trabajo. Finalmente se tomaron algunas medidas técnicas como instalar un enclavamiento para amarrar un apoyo y un gato de elevación, lo que incrementa la capacidad de carga del apoyo y optimiza el método de desplazamiento del apoyo, para mejorar la estabilidad general del apoyo en el frente de trabajo carbonífero. El objetivo inicial de seguridad y alta eficiencia minera para el frente de trabajo carbonífero #3up509 se alcanzó con estas medidas.

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How to Cite

APA

Zhang, W., Zhang, W., Zhang, D., Qi, D. and He, Z. (2021). A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study. Earth Sciences Research Journal, 25(1), 101–108. https://doi.org/10.15446/esrj.v25n1.74167

ACM

[1]
Zhang, W., Zhang, W., Zhang, D., Qi, D. and He, Z. 2021. A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study. Earth Sciences Research Journal. 25, 1 (Apr. 2021), 101–108. DOI:https://doi.org/10.15446/esrj.v25n1.74167.

ACS

(1)
Zhang, W.; Zhang, W.; Zhang, D.; Qi, D.; He, Z. A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study. Earth sci. res. j. 2021, 25, 101-108.

ABNT

ZHANG, W.; ZHANG, W.; ZHANG, D.; QI, D.; HE, Z. A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study. Earth Sciences Research Journal, [S. l.], v. 25, n. 1, p. 101–108, 2021. DOI: 10.15446/esrj.v25n1.74167. Disponível em: https://revistas.unal.edu.co/index.php/esrj/article/view/74167. Acesso em: 23 aug. 2024.

Chicago

Zhang, Wei, Weisheng Zhang, Dongsheng Zhang, Dahong Qi, and Ziming He. 2021. “A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study”. Earth Sciences Research Journal 25 (1):101-8. https://doi.org/10.15446/esrj.v25n1.74167.

Harvard

Zhang, W., Zhang, W., Zhang, D., Qi, D. and He, Z. (2021) “A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study”, Earth Sciences Research Journal, 25(1), pp. 101–108. doi: 10.15446/esrj.v25n1.74167.

IEEE

[1]
W. Zhang, W. Zhang, D. Zhang, D. Qi, and Z. He, “A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study”, Earth sci. res. j., vol. 25, no. 1, pp. 101–108, Apr. 2021.

MLA

Zhang, W., W. Zhang, D. Zhang, D. Qi, and Z. He. “A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study”. Earth Sciences Research Journal, vol. 25, no. 1, Apr. 2021, pp. 101-8, doi:10.15446/esrj.v25n1.74167.

Turabian

Zhang, Wei, Weisheng Zhang, Dongsheng Zhang, Dahong Qi, and Ziming He. “A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study”. Earth Sciences Research Journal 25, no. 1 (April 16, 2021): 101–108. Accessed August 23, 2024. https://revistas.unal.edu.co/index.php/esrj/article/view/74167.

Vancouver

1.
Zhang W, Zhang W, Zhang D, Qi D, He Z. A Mechanical Analysis of Support Instability Risk along the Strike of Coalface in Thick Coal Seam with Large Dip Angle: A Case Study. Earth sci. res. j. [Internet]. 2021 Apr. 16 [cited 2024 Aug. 23];25(1):101-8. Available from: https://revistas.unal.edu.co/index.php/esrj/article/view/74167

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2. Kristin D. Chilton, James A. Spotila. (2022). Uncovering the Controls on Fluvial Bedrock Erodibility and Knickpoint Expression: A High‐Resolution Comparison of Bedrock Properties Between Knickpoints and Non‐Knickpoint Reaches. Journal of Geophysical Research: Earth Surface, 127(3) https://doi.org/10.1029/2021JF006511.

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