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Characteristics and dominant controlling factors of gas outburst in Huaibei coalfield and its countermeasures

International Journal of Mining Science and Technology 2013年第4期23卷 578-583页

作者： Haifeng Wang Liang Wang Yuanping Cheng Hongxing Zhou School of Safety Engineering National Engineering Research Center of Coal Gas Control China University of Mining & Technology Xuzhou 221116 China School of Safety Engineering National Engineering Research Center of Coal Gas Control China University of Mining & Technology Xuzhou 221116 China Post-Doctoral Research Station of Huaibei Mining Corporation Limited Huaibei 235000 China

In order to master the main characteristics and controlling factors of gas disasters in Huaibei coalfield, based on data analysis, experimental determination and theoretical research, we analyzed the geological evolution and gas parameters in Huaibei mining area. The results show that Huaibei coalfield is located in Xu-Su arcuate tectonic circle, and the coal seam and gas occurrence took on bipolar-distribution. The dominant controlling factors of gas outburst were tectonic structures, tectonic stress, magma intrusion and mining depth. The geological conditions of Huaibei coalfield were very complicated, and almost all the outburst accidents occurred in tectonic structure zones. The horizontal tectonic stress played a dominant role in outburst accident. The thermal evolution and trap effect of magma intrusion controlled the physical characteristics of coal, gas occurrence and outburst. With the increase of mining depth, the possibility of gas outburst accidents increased significantly. After carrying out several effective regional measurements, the gas control effect was obvious and could ensure safety and high efficiency mining in outburst coal seams.

关键词： Huaibei coalfield Coal and gas outburst Tectonic stress Magma intrusion dominant controlling factor Countermeasure

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