Shiquan Coal Caving Face Mining Goaf Gas Control Technology Research

It designs gob gas treatment technology programs for 101 mechanized caving coal mining face of Shiquan that the gas gauge problem often encountered;No.2 coal seam gas on the basis of the mine parameters were determined;It determines the Gob "three zones" distribution according to the characteristics of overlying rock caving goaf and UDEC on numerical simulations;Gas migration law analysis goaf and establish differential equations.Applying FLUENT simulation software platform on the mine goaf of Shiquan according to the actual situation,from the analysis,the gob gas concentration distribution law,from face to goaf gradually increased along the direction toward gas concentration,gas concentration gradually increasing tendency in the direction from the inlet to the return airway Lane,gas concentration increases with height increases along the vertical direction.For "U+I"(towards the tail roadway)picked type Ventilation Air Methane migration law area were simulated to prove that such ventilation for solving mechanized caving face corner and return airway gas accumulation has played a very limiting the role of the good,but on the corner there still overrun occurs,so to design a roof drilling in the tail roadway drainage,drainage pipe,on the corner tube drainage and other governance Mined gas measures,which are good solutions to the problem on the corner gas gauge;Ideas and methods in Shiquan 101 mechanized caving mining goaf gas control can be applied to the use of mines with similar conditions.