Study on Distribution of Gas Concentration in Air Return Corner Based on Co-Kriging Interpretation

Abstract:

In order to study the distribution of gas concentration in air return corner, co-kriging is adopted to do the interpretation of gas concentration in air return corner and air volume is regarded as a covariate. The study is based on the gas concentration distribution in air return corner of 5916 working face in Longfeng coalmine and the results show that co-kriging interpretation results produce smooth curves of gas concentration distribution in air return corner. Gas in goaf of 5916 working face is mostly emitted from air return corner and the airflow velocity of air return corner is low and the airflow is in eddy state. The main dissolute could not dilute and excrete the accumulative gas. Therefore, gas in air return corner is an important dangerous source.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 1188-1193
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.1188
• Online since: December 2012
• Authors: Gang Wang, Heng Guo, Lu Lu Sun
• Keywords: Air Return Corner, Co-Kriging Interpretation, Concentration Distribution, Gas

References

[1] Gao Jian-liang, Hou San-zhong. Dynamic distribution of gas pressure and emission around a diving roadway [J]. Journal China Coal Society, 2007, 32(11): 1127-1131.(In Chinaese)

[2] Si Chun-feng, Peng Dan-ren. Application of Pulse Ventilation for Controlling Gas Accumulation at Upper Corner Angle of Coal Face [J]. Mining Safety & Environmental Protection, 2002, 29(6): 36-39. (In Chinaese)

[3] Wang Hai-qiao, Shi Shi-liang, Liu Rong-hua, etc. Numerical simulation study on ventilation flow field of wall-attached jet in heading face [J]. Journal China Coal Society, 2004, 29(4): 425-428. (In Chinaese)

[4] T. Ren and R. Balusu. The use of CFD modelling as a tool for solving mining health and safety[C]. Proceedings of the 2010 Underground Coal Operators' Conference, 2010: 339-349

[5] Nakayama, S. , Uchino , K. and Inoue M. . Analysis of ventilation air flow at heading face by computational fluid dynamics[J]. Shigen-To-Sozai, 1995, 111(4): 225~230

DOI: 10.2473/shigentosozai.111.225

[6] Xu Jian-hua. Mathematic methods in modern geography [M]. Beijing: Higher Education Press, 2002. (In Chinaese)

[7] Ji Qing, Yu Ming. Study on Parameters Setting of Ordinary Co-kriging Interpretation to Average Annual Temperature [J]. Journal of Capital Normal University(Natural Science Edition), 2010, 31(4): 81-87. (In Chinaese)

[8] Tang Guo-an. Spatial analysis method of arcView geographic information system [M]. Beijing: Science Press, 2002.

[9] Li Xin, Cheng Guo-dong, Lu Ling. Comparison of Spatial Interpolation Methods [J]. Advance in Earth Sciences, 2000, 15(3): 260-265. (In Chinaese)