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Discussion of the indexes of nonoutburst coal seam upgrade and its corresponding critical value

Authors :
Ming-ju Liu
Lei Meng
Jian-ping Wei
Yan-wei Liu
Source :
Journal of Coal Science and Engineering (China). 15:382-388
Publication Year :
2009
Publisher :
Springer Science and Business Media LLC, 2009.

Abstract

In view of the measurement difficulties of indexes recommended by the 50 Items Experience of Coal Mine Gas Prevention in the process of the nonoutburst coal seam upgrade, this paper took the No.8 coal seam of Huainan Mining Group as research object. Discussed the suitability of indexes and corresponding critical values, put forward method in determining the indexes and its critical values by analysis and investigation of the gas geological condition and the-spot tracking near position where an outburst occurred combined with laboratory experiment, and established the indexes and its critical values of nonoutburst coal seam upgrade in No.8 coal seam of Huainan Mining Group. The results show that it is suitable to take gas content and tectonic soft coal thickness easily to gain in routine production as primary upgrade indexes that its critical values are 7.5 m3/t and 0.8 m, respectively. In addition, take f value and Δp value as auxiliary indexes.

Details

ISSN :
18666566 and 10069097
Volume :
15
Database :
OpenAIRE
Journal :
Journal of Coal Science and Engineering (China)
Accession number :
edsair.doi...........a1c1e6301926ffa86ec54a09a42c2daa
Full Text :
https://doi.org/10.1007/s12404-009-0408-y