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3D Numerical Modelling of the Application of Cemented Paste Backfill on Displacements around Strip Excavations

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  • Krzysztof Skrzypkowski

    (Faculty of Civil Engineering and Resource Management, AGH University of Science and Technology, Mickiewicza 30 av, 30-059 Kraków, Poland)

Abstract

This article presents laboratory and spatial numerical modeling of cemented paste backfill. The first part of the research concerned laboratory tests of a mixture of sand, water, and variable cement content (5%, 10%, and 15%). The density and curing time of the mixture were determined. Moreover, cylindrical samples with a diameter of 46 mm and a height of 92 mm were constructed, for which compressive and tensile strength were calculated after one, two, three, and four weeks. The second part of the research concerned 3D numerical modeling with the use of RS3 software. For the exploitation field with dimensions of 65 m × 65 m, a strip-mining method was designed. The main objective of the research was to determine the changes in displacements around the haulage room and transportation roadway located in the immediate vicinity of the exploitation field. For the first time in numerical modeling, a two-sided strip method was used for the four stages of mining the ore deposit where the post-mining space was filled with a cemented paste backfill. Based on this research, the compressibility coefficient was determined.

Suggested Citation

  • Krzysztof Skrzypkowski, 2021. "3D Numerical Modelling of the Application of Cemented Paste Backfill on Displacements around Strip Excavations," Energies, MDPI, vol. 14(22), pages 1-17, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7750-:d:682310
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    References listed on IDEAS

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    1. Xiaoping Shao & Xin Li & Long Wang & Zhiyu Fang & Bingchao Zhao & Ershuai Liu & Yeqing Tao & Lang Liu, 2020. "Study on the Pressure-Bearing Law of Backfilling Material Based on Three-Stage Strip Backfilling Mining," Energies, MDPI, vol. 13(1), pages 1-16, January.
    2. 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.
    3. Xiaowei Feng & Nong Zhang & Lianyuan Gong & Fei Xue & Xigui Zheng, 2015. "Application of a Backfilling Method in Coal Mining to Realise an Ecologically Sensitive “Black Gold” Industry," Energies, MDPI, vol. 8(5), pages 1-12, April.
    4. Krzysztof Skrzypkowski, 2020. "Decreasing Mining Losses for the Room and Pillar Method by Replacing the Inter-Room Pillars by the Construction of Wooden Cribs Filled with Waste Rocks," Energies, MDPI, vol. 13(14), pages 1-20, July.
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    Cited by:

    1. Yuqing Wang & Yongkui Shi & Jian Hao, 2023. "Safety Evaluation and Simulation Research of Filling Mining Mine—A Case Study of Jisuo Coal Mine," Sustainability, MDPI, vol. 15(13), pages 1-23, June.

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