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Basic Experimental Study of Plasticity Material for Coal Rock Fracture Grouting Based on RSM-PCA Technology

Author

Listed:
  • Weitao Liu

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Yueyun Qin

    (College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
    State Key Laboratory of Mining Disaster Prevention, Shandong University of Science and Technology, Qingdao 266590, China)

  • Xiangxi Meng

    (College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
    State Key Laboratory of Mining Disaster Prevention, Shandong University of Science and Technology, Qingdao 266590, China)

  • Lifu Pang

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Mengke Han

    (College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Zengmou Song

    (College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

Abstract

The internal fractures in coal and rock mass are important factors affecting the safety of underground engineering such as coalbed methane exploitation, so the comprehensive properties of materials used to seal the fractures are particularly critical. In this paper, firstly, the indexes of the main factors affecting the plugging material (viscosity, bleeding rate, setting time, and strength) were analyzed. Then, the sensitivity of the materials used to seal the fractures was studied and discussed using a principal component analysis and response surface analysis (RSM-PCA). The primary conclusions are as follows: (1) Bleed rate and setting time were the first principal components affecting the comprehensive properties of the plugging materials, and compressive strength was the second principal component. (2) The regression equation was established to characterize the comprehensive properties of the integrated plugging materials, and the optimal mix ratio was 34% of cement content, 11% of sand content, and 0.53 of the W/C. (3) The microscopic results showed that the silicate minerals in the consolidated body grow in a bridging manner and formed a mixed gel with cement hydration product to fill the pores and microcracks and improved the interface transition zone.

Suggested Citation

  • Weitao Liu & Yueyun Qin & Xiangxi Meng & Lifu Pang & Mengke Han & Zengmou Song, 2021. "Basic Experimental Study of Plasticity Material for Coal Rock Fracture Grouting Based on RSM-PCA Technology," Energies, MDPI, vol. 14(15), pages 1-20, July.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:15:p:4516-:d:601908
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    References listed on IDEAS

    as
    1. Dan Ma & Qiang Li & Matthew R. Hall & Yu Wu, 2017. "Experimental Investigation of Stress Rate and Grain Size on Gas Seepage Characteristics of Granular Coal," Energies, MDPI, vol. 10(4), pages 1-15, April.
    2. Yutao Li & Yixin Zhao & Yaodong Jiang & Bo Zhang & Honghua Song & Bin Liu, 2020. "Characteristics of Pore and Fracture of Coal with Bursting Proneness Based on DIC and Fractal Theory," Energies, MDPI, vol. 13(20), pages 1-19, October.
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    Cited by:

    1. Liu, Weitao & Sun, Yida & Meng, Xiangxi & Qin, Yueyun, 2023. "Experimental analysis of Nano-SiO2 modified waterborne epoxy resin on the properties and microstructure of cement-based grouting materials," Energy, Elsevier, vol. 268(C).
    2. Xi, Xian & Jiang, Shuguang & Shi, Quanlin, 2023. "Study on the flow and bonding-reinforcement characteristics of composite foam slurry material used to block mine leakage," Energy, Elsevier, vol. 263(PD).

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