Journal
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
Volume 41, Issue 3, Pages 338-348Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15567036.2018.1518352
Keywords
Coal seam deformation; gas control; pressure-relief; protective layer mining; stress evolution
Funding
- Fundamental Research Funds for the Central Universities [2017XKZD01]
Ask authors/readers for more resources
Protective layer mining is considered to be an effective method to resolve the outburst risk of coal seams, but limited theoretical and experimental results exist for remote upper protective layer mining. To study the effect of the remote upper protective layer mining, a case study of the Renlou Coal Mine is selected. The stress evolution in the protected layer is analyzed using Flac(3D) and is verified by the measurement of coal seam deformation and investigation of the unloading boundary. The results indicate that remote upper protective layer mining induces an unloading of stress within the protected layer, while a stress concentration occurs outside of the unloading area. The coal seam deformation is consistent with the stress evolution, for which the maximum compressional and expansional deformation are 0.5 parts per thousand and 7.19 parts per thousand, respectively. The gas pressure decreases significantly as a consequence of these applications, following which the gas pressures within the theoretical unloading boundary are 0.30 MPa and 0.35 MPa along-strike and along the tendency of the protected layer, respectively.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available