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

International Standard Serial Number (ISSN)

1996-1073

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 License
This work is licensed under a Creative Commons Attribution 4.0 License.

Share

 
COinS