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Research on the Mechanism of Tectonic Stress Field Evolution for Coal and Gas Outburst

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Abstract:

The geological characteristics of Pingdingshan mining area in China is fault block uplift and the depression in all around. The faults in the region are dominated by NW trending faults. Our researches show that most of faults experience different mechanics process and movement character because of the evolution of tectonic stress field. The regional distribution of coal and gas outburst is consequent on the regional distribution of regional tectonic stress, tectonic coal and gas storage. At the action of SW-NE extrusion stress by the effect of Qinling orogeny belt, the NWW strike structure and the NNE composite tectonics are prone to occur coal and gas outburst because of concentrated stress, low penetrability and good gas storage condition. Also incorporated with in situ stress measurements and the numerical simulation of regional tectonic stress field by using self-developed Rock Mass Stress-state Analysis System software, the mechanism of the tectonic stress field on coal and gas outbursts is analyzed. The results indicate that the distribution of rock stress depends upon the faults and is formed again because of superposition of the action of faults. Tectonic stress field and its uneven distribution provide dynamic conditions for the occurrence of coal and gas outbursts.

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Periodical:

Applied Mechanics and Materials (Volumes 325-326)

Pages:

1352-1356

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.325-326.1352

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Cite this paper

Online since:

June 2013

Authors:

Wei Hua Song, Hong Wei Zhang

Keywords:

CoAl, Gas Outburst, Geologic Structure, In Situ Stress Measurement, Tectonic Stress Field Evolution

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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References

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