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Rapid Excavation and Stability Control of Deep Roadways for an Underground Coal Mine with High Production in Inner Mongolia

Author

Listed:
  • Zhengzheng Xie

    (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)

  • Deyu Qian

    (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)

  • Yanpei An

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

  • Yang Wang

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China
    School of Public Policy and Urban Affairs, College of Social Sciences and Humanities, Northeastern University, Boston, MA 02115, USA)

Abstract

For large underground coal mines producing 10 million tons a year, rapid excavation and stability of deep roadways are pivotal to ensure sustainable, safe, and efficient production. This paper provides a case study of Hulusu Coal Mine in Inner Mongolia, where roadway excavation speed was insufficient to meet production needs. Moreover, deformation in the roofs of the roadways was severe. To achieve rapid excavation and control the stability of deep roadways, a new support system was proposed and constructed in a roadway at a depth of 640 m. The system consisted of long flexible bolts pretensioned to high levels and spaced at large intervals. Roadway excavation and construction of a support system were conducted simultaneously. Field measurements indicated that the new support system effectively controlled deformation and fracture development during excavation and mining. Maximum displacements of the roof during excavation and mining were 10 and 30 mm, respectively. The axial load on bolts surged during excavation as a result of slight deformations caused by excavation operations. This active response of the bolts is beneficial to the prevention of roof deformation during excavation and mining. During mining, fissures propagated up to only a depth of 1.4 m into the surrounding rock mass. The new support system formed a thick reinforced anchorage zone, which greatly improved the bearing capacity of the roof. Compared with the previous support system, the new system allowed the maximum excavation speed (31.5 m/day) to increase by 85.3%. This successful case provides a practical reference for similar roadway projects.

Suggested Citation

  • Zhengzheng Xie & Nong Zhang & Deyu Qian & Changliang Han & Yanpei An & Yang Wang, 2018. "Rapid Excavation and Stability Control of Deep Roadways for an Underground Coal Mine with High Production in Inner Mongolia," Sustainability, MDPI, vol. 10(4), pages 1-17, April.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:4:p:1160-:d:140818
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    References listed on IDEAS

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    1. Deyu Qian & Nong Zhang & Dongjiang Pan & Zhengzheng Xie & Hideki Shimada & Yang Wang & Chenghao Zhang & Nianchao Zhang, 2017. "Stability of Deep Underground Openings through Large Fault Zones in Argillaceous Rock," Sustainability, MDPI, vol. 9(11), pages 1-28, November.
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    Cited by:

    1. Zhengzheng Xie & Nong Zhang & Yuxin Yuan & Guang Xu & Qun Wei, 2019. "Study on Safety Control of Composite Roof in Deep Roadway Based on Energy Balance Theory," Sustainability, MDPI, vol. 11(13), pages 1-18, July.
    2. Tieliang An & Xigui Zheng & Dengxing Zhu & Deyu Qian & Yu Guo & Juncai Cao, 2019. "Experimental investigation of pretensioned bolts under cyclic loading: Damage assessment using acoustic emission," International Journal of Distributed Sensor Networks, , vol. 15(5), pages 15501477198, May.
    3. Peng Ma & Deyu Qian & Nong Zhang & Hideki Shimada & Dongjiang Pan & Kejun Huang, 2020. "Application of Bolter Miner Rapid Excavation Technology in Deep Underground Roadway in Inner Mongolia: A Case Study," Sustainability, MDPI, vol. 12(7), pages 1-17, March.
    4. Jianjun Wu & Ziyue Xu & Xinqiu Fang & Guangliang Shi & Haiyan Wang, 2022. "Research on Path Planning and Control Method for Secondary Autonomous Cutting of Cantilever Roadheader in a Large-Section Coal Roadway," Sustainability, MDPI, vol. 15(1), pages 1-22, December.
    5. 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.
    6. Ziyue Xu & Minfu Liang & Xinqiu Fang & Gang Wu & Ningning Chen & Yang Song, 2022. "Research on Autonomous Cutting Method of Cantilever Roadheader," Energies, MDPI, vol. 15(17), pages 1-14, August.
    7. 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.

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