|
China's coal mine gas accident -prone , and a serious threat to the coal mine production safety and sustainable development , and reasonably effective high gas coal mine gas drainage method is particularly important . According to the 40104 face large mining high Dafosi , big production , gas emission characteristics of large Comprehensive Gas Control Research carried out on fully mechanized caving face to provide a theoretical basis for future gas control . According to mine large Buddhist temple coal mine Binchang coal seam and Face Facts , Face Gas source composition and proportion . Derived gas emission sources , mainly coal drop of gas emission , the coal wall gas emission and goaf gas emission . Through the Face Gas Emission forecast , drawn to face production Gas Emission total 88.78m3/min . Combined the Bin long mine Dafosi , coal mines fully mechanized caving face features , take the integrated gas control method , the method including the upper corner of intubation drainage , face Predrainaging the and while mining pumping postharvest Relief Gas Drainage , high gas pumping Lane drainage its gas put in process , and the construction of drainage gas drilling study . Mechanized Caving Face corner intubation drainage , the face while mining pumping pre- pumping and postharvest Relief Gas Drainage high gas pumping Lane drainage effect . Field data analysis , drawn face drainage rate of 73.2% , mine gas drainage volume 84.59m3/min, mine gas drainage rate of 54.4% , nearly 10 % in the original basis . Achieve good governance , to ensure the safe and efficient recovery of the face , and achieved good economic and social benefits .
|