IMECH-IR  > 力学所知识产出(1956-2008)
A Preliminary Study of Gas Bursts
Cheng CM(郑哲敏); Ding YS(丁雁生)
Source PublicationProceedings of the International Symposium on Coal Technology and Science
Conference NameInternational Symposium on Coal Technology and Science
Conference Date1985
Conference PlaceChina
AbstractAfter showing data describing several of the large bursts in China it is concluded that the driving force of the gas bursts is determined by the internal energy of gas contained in the coal and a large portion of this gas must have come from the coal seam surrounding the cavity.The authors consider the pulverization of the coal as a key factor in analysing the seepage through it.The release of gas from spheric particles of powdered coal is first dealt with and a plane one-dimensional model is studied numerically together with a similarity solution based on further simplifying assumptions.An improved estimate of available energy, taking into consideration pulverization and desorption, is given.Calculated results are in fair agreement with experiments and the estimated flow rate based on similarity solution agree qualitatively with field measurements.It is premised that a criterion related to the minimum amount of coal being thrown out must be fulfilled in an actual burst in addition to the liability indices of the tectonic pressure, gas pressure and the gas release rate.
Document Type会议论文
Recommended Citation
GB/T 7714
Cheng CM,Ding YS. A Preliminary Study of Gas Bursts[C]Proceedings of the International Symposium on Coal Technology and Science,1985.
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