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Application of Confined Blasting in Water-Filled Deep Holes to Control Strong Rock Pressure in Hard Rock Mines

Author

Listed:
  • Jingxuan Yang

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

  • Changyou Liu

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

  • Bin Yu

    (Datong Coal Mine Group Co. Ltd., Datong 037000, China)

Abstract

In extra-thick coal seams, mining operations can lead to large-scale disturbances, complex overburden structures, and frequent and strong strata behavior in the stope, which are serious threats to mine safety. This study analyzed the overburden structure and strata behavior and proposed the technique of confined blasting in water-filled deep holes as a measure to prevent strong rock pressure. It found that there are two primary reasons for the high effectiveness of the proposed technique in presplitting hard coal and rock. First, the fracture water enables much more efficient transfer of dynamic load due to its incompressibility. Second, the subsequent expansion of water can further split the rock by compression. A mechanical model was used to reveal how the process of confined blasting in water-filled deep holes presplit roof. Moreover, practical implementation of this technique was found to improve the structure of hard, thick roof and prevent strong rock pressure, demonstrating its effectiveness in roof control.

Suggested Citation

  • Jingxuan Yang & Changyou Liu & Bin Yu, 2017. "Application of Confined Blasting in Water-Filled Deep Holes to Control Strong Rock Pressure in Hard Rock Mines," Energies, MDPI, vol. 10(11), pages 1-16, November.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:11:p:1874-:d:118991
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    Citations

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    Cited by:

    1. Qiang Fu & Ke Yang & Xiang He & Zhen Wei & Qinggan Yang, 2022. "Characteristics of Strata Behavior and Differentiated Control of Fully Mechanized Mining Working Face with Abnormal Roof," Sustainability, MDPI, vol. 14(20), pages 1-15, October.
    2. Ningbo Zhang & Changyou Liu & Baobao Chen, 2018. "A Case Study of Presplitting Blasting Parameters of Hard and Massive Roof Based on the Interaction between Support and Overlying Strata," Energies, MDPI, vol. 11(6), pages 1-14, May.
    3. Xiaoyu Liu & Manchao He & Jiong Wang & Zimin Ma, 2021. "Research on Non-Pillar Coal Mining for Thick and Hard Conglomerate Roof," Energies, MDPI, vol. 14(2), pages 1-14, January.
    4. Yingyuan Wen & Anye Cao & Wenhao Guo & Chengchun Xue & Guowei Lv & Xianlei Yan, 2023. "Strata Movement and Mining-Induced Stress Identification for an Isolated Working Face Surrounded by Two Goafs," Energies, MDPI, vol. 16(6), pages 1-18, March.

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