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Article
Time Effect of Water Injection on the Mechanical Properties of Coal and its Application in Rockburst Prevention in Mining
Energies
  • Xiaofei Liu
  • Guang Xu, Missouri University of Science and Technology
  • Chong Zhang
  • Biao Kong
  • Jifa Qian
  • Dong Zhu
  • Mingyao Wei
Abstract

Coal seam water injection is widely used to prevent rockbursts in coal mines, and the duration of water injection is an important parameter related to the effectiveness of rockburst prevention, making it of practical importance to optimize the effective water injection duration. This paper presents the test results of the mechanical properties and pore structure of samples with different soaking time, obtained from a working face where rockburst occurred. Soaking time changes the mechanical properties of samples, and this time effect differs with the coal size (from centimeter to nanometer size). Results of numerical simulation and on-site tests in the Changgouyu coal mine demonstrated that water injection can effectively soften coal bodies and release or transfer stresses, and the time effect of water injection on rock prevention and control is apparent.

Department(s)
Mining and Nuclear Engineering
Comments
This work was supported by the Fundamental Research Funds for the Central Universities (2017CXNL02), and A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD). This work also was funded by China Scholarship Council. The authors are grateful to all the people who help us in this paper.
Keywords and Phrases
  • Coal,
  • Coal deposits,
  • Coal mines,
  • Computer simulation,
  • Mechanical properties,
  • Numerical models,
  • Oil well flooding,
  • Porosity,
  • Rock bursts,
  • Underground structures,
  • Coal seam water injections,
  • Injection durations,
  • On-site tests,
  • Practical importance,
  • Prevention and controls,
  • Rock burst preventions,
  • Soaking test,
  • Time effect,
  • Water injection,
  • Numerical simulation,
  • Rockburst
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2017 The Author(s), All rights reserved.
Creative Commons Licensing
Creative Commons Attribution 4.0
Publication Date
11-1-2017
Disciplines
Citation Information
Xiaofei Liu, Guang Xu, Chong Zhang, Biao Kong, et al.. "Time Effect of Water Injection on the Mechanical Properties of Coal and its Application in Rockburst Prevention in Mining" Energies Vol. 10 Iss. 11 (2017) ISSN: 1996-1073
Available at: http://works.bepress.com/guang-xu/37/