| The worked-out section loses coal spontaneous combustion and the previous solid angle gas accumulation leaks out with the worked-out section the class distribution related, under the existing technology and the current economic condition, leaks out the flow field regarding the worked-out section to carry on actual is very difficult. Therefore, this paper puts the working surface worked-out section take the synthesis to leak out the class as the object of study, and use methods and so on to experimental observation, theoretical analysis and computer simulation, the research worked-out section gas migration rule.With long-term observation to the Xinglongzhuang 4326 working surface worked-out section, this paper obtained the worked-out section temperature distribution and the oxygen concentration distributed rule. Through tests loses the coal spontaneous combustion and the factor of porosity distributed rule to the worked-out section; Having determined through the computation worked-out section parameters and so on leaking out intensity and penetration coefficient, obtain the worked-out section gas migration the mathematical model, and carries on the numerical simulation using the FLUENT software; It had demonstrated by the graph way the worked-out section gas migration rule, and provided the reliable theory basis for the worked-out section gas government and the working surface gas government, provides the experiment foundation for the following research. Through curve fitting means the trinomial and the relationship of methane distributing these data in gob was discussed. Especially, the grey theory was used to calculate the grey absolute correlation between CH4 and other methane to establishing the method for judging related factors which impact CH4 distribution .On this basis, by analyzing the property of methane distributing in the inters pace of gob, as well as the method on"three zone"sorting, a determinant principle on the thermal storage location in goaf was bring forward. |
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