The Law And Application Of The Gas Migration In The Goaf Of Full-mechanized Mining Working Face

This thesis, the author discusses the migration of gas in the goaf of full- mechanized mining working face and its characteristic, on the basis of data collecting from mine, the author analyze and summarize law in full-mechanized mining working face, which including the emission source of goaf,the proportion of gas emission rate from goaf , the law of gas flow and the distributing of gas concentration, the thesis also analyze some factor that affect the emission rate from goaf ,the main factor are air quantity, the velocity the working face is advanced, the ventilating pressure and the ventilation system 0 The mathematical model of migration of gas in goaf is established, use the relevant program simulating the condition of a goafo By means of the numerical simulation, it can provided reliable evidence for solve the problem of gas 0 The author bring forward the way to solve the problem of gas by gas drainage conbining rational ventilation system 0 During this technique was applied in Si He mine of JinCheng Coal Co. in Shanxi province, The effect was investigated and analyzed by tracking the process in the mine, results of this method were checkouted practically 0...