Integrated control technique for losing coal spontaneous combustion of the top-coal falling region in high-gas mine

Abstract：Reasons on the forms the fault top-coal falling region is analyzed at an angle of rock mechanics.By taking heat transfer and mass transfer theory as the basis, reason of the losing coal spontaneous combustion in top-coal falling region is discussed.On this basis, fire fighting technique effect by the action of grout, plugging leakage channel and nitrogen injection is analyzed combined with the actual situation of the spontaneous ignition in working surface of 13081 of the 13th mine, Pingdingshan coal co.Ltd.The content of index gas CO rapidly declines and finally it disappears by the implementation of an integrated fire-extinguishing technology.The results show that the integrated fire-extinguishing technology is feasible to control the losing coal spontaneous combustion in the top-coal falling region.

Keyword：top-coal falling region;spontaneous combustion;integrated fire-extinguishing technolog