Law Of Methane Migration And Application At101Caving Goaf Of Shi Quan Coal Mine

According to methane concentration overrunning in101caving face of Shi Quan coal mineat Xiang Yuan. The program is proposed based on numerical simulation and characteristic ofcaving rock at goaf in thesis which means methane at goaf will be pumped by buried and dividedpipes. Divided Pipe is owing to methane floating. It could be known that methane easily gathersat top corner and methane concentration is higher at depth of goaf than nearby goaf by datatested underground. Coal seam’ methane content increases by depth in101mining face. Methaneemission at goaf is predicted by sub-source prediction method which is similar to actual data.Basis of characteristic of caving rock and methane migration at goaf, Flow field coupling modelis established by Gambit. The distribution of methane at goaf and the state of methane migrationunder pumping are simulated. Methane concentration overrunning at top corner which could besolved by pumping pipes buried at goaf is caused by leakage and different pressure in cavingface. The method of pumping methane at101caving goaf is designed and it is emphasized thatpumping with mining. It is determined the reasonable parameter by numerical simulation andeffect tested underground. Methane control method at101caving goaf of Shi Quan coal minecan be popularized to similar mines.