Open Access. Powered by Scholars. Published by Universities.®

Mining Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

2017

Coal mines

Articles 1 - 2 of 2

Full-Text Articles in Mining Engineering

Time Effect Of Water Injection On The Mechanical Properties Of Coal And Its Application In Rockburst Prevention In Mining, Xiaofei Liu, Guang Xu, Chong Zhang, Biao Kong, Jifa Qian, Dong Zhu, Mingyao Wei Nov 2017

Time Effect Of Water Injection On The Mechanical Properties Of Coal And Its Application In Rockburst Prevention In Mining, Xiaofei Liu, Guang Xu, Chong Zhang, Biao Kong, Jifa Qian, Dong Zhu, Mingyao Wei

Mining and Nuclear Engineering Faculty Research & Creative Works

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 ...


Effects Of Loading Rate On Gas Seepage And Temperature In Coal And Its Potential For Coal-Gas Disaster Early-Warning, Chong Zhang, Xiaofei Liu, Guang Xu, Xiaoran Wang Sep 2017

Effects Of Loading Rate On Gas Seepage And Temperature In Coal And Its Potential For Coal-Gas Disaster Early-Warning, Chong Zhang, Xiaofei Liu, Guang Xu, Xiaoran Wang

Mining and Nuclear Engineering Faculty Research & Creative Works

The seepage velocity and temperature externally manifest the changing structure, gas desorption and energy release that occurs in coal containing gas failure under loading. By using the system of coal containing gas failure under loading, this paper studies the law of seepage velocity and temperature under different loading rates and at 1.0 MPa confining pressure and 0.5 MPa gas pressure, and combined the on-site results of gas pressure and temperature. The results show that the stress directly affects the seepage velocity and temperature of coal containing gas, and the pressure and content of gas have the most sensitivity ...