Study And Application Of The Safety Mining Technology In Fullly Mechanized Face Under The Danger Of Small Skiln Soaf

For a Long time, shallow burying and inflammable seam work has suffered seriously from the seam's spontaneous combustion ignition. What's more, the upside has the worked-out section coal mining, what main consideration is the threat that the upside in the worked-out section gas emerges from the upside to the working surface massively.Firstly, let's analyze the major security risk of the seams by its features. When mining in the worked-out section seam, it is impossible that massive gas emerges from the upside to the working surface as a potential safety hazardSecondly, for coal spontaneous combustion hazard, we monitor the situation of the upper seam's spontaneous combustion ignition by safety supervision system assisted drill. Facing the threat of gas into the work we intend to use the pressurization ventilation technology to heighten the work face' absolute pressure, at the same time, restrain gas into compound mining.Aimed at the emergent high concentrations of harmful gas in upper worked-out section seam, it should detect the source at first, then plug the source, at last, pump and exhaust the harmful gas to relieve the threat. Facing the spontaneous combustion ignition, we plan to deal with the work face by grouting and nitrogen injection, after block even lanes.Finally, according to field test and proving, it has a sound effect that monitor the situation of the upper seam's spontaneous combustion ignition by safety supervision system assisted drill. It meet the pressurization ventilation system's requirements of restraining massive gas into compound mining face, Safety supervision technology make sure of the source of harmful gas, pumping and exhausting fill the bill the threat of harmful gas to work face.This paper starts with the threat of present seam's spontaneous combustion ignition, combining the related foreign and civil technologies, Puts forward measures,at last, these technologies and methods are confirmed by practice, meanwhile, they can provide reference to similar safety mining.