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Stability Control of a Goaf-Side Roadway under the Mining Disturbance of an Adjacent Coal Working Face in an Underground Mine

Author

Listed:
  • Houqiang Yang

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Changliang Han

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Nong Zhang

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Changlun Sun

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Dongjiang Pan

    (State Key Laboratory of Shield Machine and Boring Technology, China Railway Tunnel Group Co., Ltd., Zhengzhou 450001, China)

  • Minghui Dong

    (Shandong Dongshan Xinyi Coal Mine Co., Ltd., Jining 272100, China)

Abstract

Goaf-side roadway driving could not only notably reduce the loss of coal resources and improve the coal recovery rates, but also greatly mitigate the imbalance between excavation speed and production needs, which are able to prolong the service life of the mine and are pivotal to sustainable and efficient development of underground coal mines. However, it is difficult to control the stability of the goaf-side roadway, especially under mining disturbance of another adjacent coal working face. In order to control the stability of the goaf-side roadway, Haulageway 1513 in the Xinyi Coal Mine of China, under mining disturbance, theoretical analysis, numerical simulation, and engineering practice were carried out to reveal the mechanism of overburden key strata fracture, stress distribution, and deformation characteristics of the surrounding rock of the goaf-side roadway due to mining disturbance. Results showed that some key strata above Goaf 1512 did not fracture due to the influence of the strata caving angles. However, these key strata would fracture and break into rock blocks when suffering from mining disturbance of the adjacent coal working face, which changed the stress distribution and increased the deformations of the surrounding rock of the goaf-side roadway. The combined techniques of pressure relief and bolt support were proposed and carried out to control the stability of the goaf-side roadway. Engineering practice indicated that the maximum deformations of the roof and sidewall-to-sidewall were 220 mm and 470 mm, respectively. The deformations of the goaf-side roadway under mining disturbance were efficiently controlled.

Suggested Citation

  • Houqiang Yang & Changliang Han & Nong Zhang & Changlun Sun & Dongjiang Pan & Minghui Dong, 2019. "Stability Control of a Goaf-Side Roadway under the Mining Disturbance of an Adjacent Coal Working Face in an Underground Mine," Sustainability, MDPI, vol. 11(22), pages 1-18, November.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:22:p:6398-:d:286762
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    References listed on IDEAS

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    1. Zhaowen Du & Shaojie Chen & Junbiao Ma & Zhongping Guo & Dawei Yin, 2020. "Gob-Side Entry Retaining Involving Bag Filling Material for Support Wall Construction," Sustainability, MDPI, vol. 12(16), pages 1-20, August.
    2. Houqiang Yang & Nong Zhang & Changliang Han & Changlun Sun & Guanghui Song & Yuantian Sun & Kai Sun, 2021. "Stability Control of Deep Coal Roadway under the Pressure Relief Effect of Adjacent Roadway with Large Deformation: A Case Study," Sustainability, MDPI, vol. 13(8), pages 1-14, April.

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