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Study on material properties and similar material proportion of weakly cemented water-resisting strata

  • Shizhong Zhang
  • Gangwei FanEmail author
  • Dongsheng Zhang
  • Mingwei Chen
  • Chengguo Zhang
Original Paper
  • 31 Downloads

Abstract

The material properties and similar materials of water-resisting strata play a significant role in the stability of the water-resisting layer and the influence of mining on the environment. According to scanning electron microscopy (SEM) and X-ray diffraction (XRD), the microstructure and mineral composition of weakly cemented water-resisting strata were analyzed, and the morphological characteristics and contents of clay minerals in the rock mass were also obtained. Moreover, given that the clay mineral contents are similar, taking fine river sands as aggregates and bentonite, gypsum, methyl silicone oil, and paraffin wax as additives, the physical and mechanical properties of similar materials such as the uniaxial compressive strength, deformation and fracture characteristics, and permeability coefficient were obtained under varying proportions of silicone oils, different paraffin contents, and no silicone oil. Thus, a new kind of weakly cemented water-resisting similar material has been developed. The results show that the uniaxial compressive strength of the material decreases as a power function and that the permeability coefficient decreases linearly under different silicone oil contents. With or without silicone oil, the material’s uniaxial compressive strength increases as a power function with an increasing paraffin content, and the permeability coefficient decreases in a logarithmic manner.

Keywords

Weakly cemented Water-resisting strata Material properties Clay minerals, Similar materials 

Notes

Acknowledgments

The authors are grateful to the helpful comments provided by the anonymous reviewers.

Funding information

This work was financially supported by the “Fundamental Research Funds for the Central Universities” [grant number 2018BSCXC28] and the “Postgraduate Research & Practice Innovation Program of Jiangsu Province” [grant number KYCX18_1961].

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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  • Shizhong Zhang
    • 1
  • Gangwei Fan
    • 2
    Email author
  • Dongsheng Zhang
    • 2
  • Mingwei Chen
    • 1
  • Chengguo Zhang
    • 3
  1. 1.School of MinesChina University of Mining & TechnologyXuzhouChina
  2. 2.State Key Laboratory of Coal Resources and Safe Mining, School of MinesChina University of Mining & TechnologyXuzhouChina
  3. 3.School of Minerals and Energy Resources EngineeringThe University of New South WalesSydneyAustralia

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