Study on Parameters of Gas Extraction in Spontaneous Combustion in Goaf and Comprehensive Prevention Process of Gas in Hongmiao Mine

Abstract:

Aimed at the comprehensive management of gas and spontaneous combustion in goaf of 5-2S fully mechanized caving face in five district of Hongmiao coal mine. The impacts on the air flow field and concentration distribution of the goaf are analyzed, that the changes of gas drainage value, and the location of drainage outlet as well as injection capacity of nitrogen. The results show that, the larger of the volume of gas drainage, the greater risk of gas explosion and spontaneous combustion. Appropriate increasing gas drainage volume is used to ensure the safety of the working face, with injecting nitrogen or accelerating the speed of face promote. The drainage outlet location should also be in an appropriate range (5~25 m) after the break line of the face. The result has important guiding significance in goaf of inflammable thick seam of gas mine, on the selection of gas extraction parameters, which is reasonable to prevent both gas explosion accident and spontaneous combustion caused by drainage excessive.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 973-979
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.973
• Online since: June 2014
• Authors: Xiang Li*
• Keywords: Gas Explosion, Gas Extraction, GOAF, Nitrogen Injection, Oxidation Zone

References

[1] Nilson R.H. Gas-driven fracture propagation [J]. J. Appl. 1981. 48 (4) : 757-762.

[2] Nilson R.H. An Integral Method for Predicting Hydraulic Fracture Propagation Driven by gases or Liquids, int. J. Num. Anal. Methods Geomech, 1986, Vol 10.

DOI: 10.1002/nag.1610100207

[3] Chris Harvey．History of Outbursts in Australia and Current Management Controls．2002 Coal Operators' Conference.

[4] Zongxiang Li, Jiren Wang, Xihua Zhou. Numerieal Simulation of Gas Drainage During Open Region Movement in Goaf[J]. Journal of China University of Mining & Technology, 2004, 33(1): 74-78.

[5] Kai Wang, Weiyang Wu. Numerical Simulation of Flow Field and Gas Transportation in Goaf of Fully Mechanized Sub-Level Caving Face with J-Shape Ventilation System[J]. Journal of China University of Mining & Technology, 2007, 36(3): 277-282.

[6] NOACK K. Control of gas emissions in underground coal mines[J]. International Journal of Coal Geology, 1998, 35: 57-82.

DOI: 10.1016/s0166-5162(97)00008-6