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Control Effects of Five Common Solid Waste Backfilling Materials on In Situ Strata of Gob

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  • Peng Huang

    (School of Mines, China University of Mining and Technology, Xuzhou 221116, China
    State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, China)

  • Sam Spearing

    (Western Australia School of Mines, Curtin University, Kalgoorlie, WA 6430, Australia)

  • Feng Ju

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China)

  • Kashi Vishwanath Jessu

    (Western Australia School of Mines, Curtin University, Kalgoorlie, WA 6430, Australia)

  • Zhongwei Wang

    (School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Pai Ning

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China)

Abstract

Solid backfill mining as a green mining method has already been successfully applied in many mine sites. Higher requirements for the backfilling materials have been put forward in special regions, such as shallow coal seams, ecologically susceptible areas, and sites with building on the surface. The control effects of common backfilling materials on in situ strata of gob need to be studied and compared to ensure the suitable materials are applied in the mine. The meso-structure, stress variation, energy dissipation, and backfilling effects of the five common solid backfilling materials, which are Aeolian sand, gangue, mineral waste residue, coal ash, and loess are analyzed in this paper. The results show that the Aeolian sand and gangue are densely packed and internally hard when compared to other backfill materials. The deformation of the five materials to absorb the same amount of energy in the order of higher to lower was determined as Aeolian sand, gangue, mineral waste residue, coal ash and loess. The Aeolian sand’s strain energy density is 1.67 times larger than the loess, however, the Aeolian’s strain energy density in front of working face is just 32.2% of the loess, which is important to ensure the safety of the working face. The stress changes were monitored in situ with Aeolian sand and gangue as backfill materials. The monitoring results show that the Aeolian sand stress increase rate is quicker than gangue, which can support the roof effectively.

Suggested Citation

  • Peng Huang & Sam Spearing & Feng Ju & Kashi Vishwanath Jessu & Zhongwei Wang & Pai Ning, 2019. "Control Effects of Five Common Solid Waste Backfilling Materials on In Situ Strata of Gob," Energies, MDPI, vol. 12(1), pages 1-14, January.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:1:p:154-:d:194528
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    Citations

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    Cited by:

    1. Dawid Szurgacz & Beata Borska & Sergey Zhironkin & Ryszard Diederichs & Anthony J. S. Spearing, 2022. "Optimization of the Load Capacity System of Powered Roof Support: A Review," Energies, MDPI, vol. 15(16), pages 1-15, August.
    2. Weiqing Zhang & Chaowei Dong & Peng Huang & Qiang Sun & Meng Li & Jun Chai, 2020. "Experimental Study on the Characteristics of Activated Coal Gangue and Coal Gangue-Based Geopolymer," Energies, MDPI, vol. 13(10), pages 1-14, May.
    3. Krzysztof Skrzypkowski, 2021. "Determination of the Backfilling Time for the Zinc and Lead Ore Deposits with Application of the BackfillCAD Model," Energies, MDPI, vol. 14(11), pages 1-19, May.
    4. Dawid Szurgacz & Beata Borska & Ryszard Diederichs & Anthony J. S. Spearing & Sergey Zhironkin, 2023. "Minimizing Internal Leaks of a Powered Roof Support’s Hydraulic Prop Based on Double Block with Charging," Energies, MDPI, vol. 16(3), pages 1-14, January.

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