The Research On The Mining Techinic Of The 'Double Upburst' Higher Coal Seam Effected By Geological Conformation

Wei Jiadi coal mine contains many faults ,the fault conformation effects the production of coal mine seriously, F1-2 fault team range is 6000m along the strike,the 100～250m along the strip,area 2.18km2 ,effected production is 389.300million ton.It is difficult to use the method of mining in slices to mine the effected by faults coal seam.So mining the effected by conformation coal seam is an unsoloved difficult technical problem. To mine the effected by conformation and 'double upburst' higher coal seam effectively,it is nessary to resolve 4 problems: First, the question of the selection of the project and technics of mining; Second, the resolve of the problem of 'double upburst' coal seam in conformation area.To mine the'double upburst'higher original c(?)al seam effected by faults by the technic of movable integrated mechanical mining,before the mining to require long time effectively deflation to unload stress and release from prominent danger,assure mining is feasible.The methods of solving 'double upburst'are beforehand deflation via the hole in layers, beforehand deflation via the hole in the same direction as layers and affusion in layers.In the course of actual mining,prevention and cure is very important,the most successful prevention and cure gas technic method in this task are: deflation at the same time of mining;'one come into two come out'ventilated method;using vent and adjusting measure to increase wind power in roof entry.The successful mining in this task offer feasible technic idea and experience to mine other section coal seam effected by F1-2 fault groups,which provided with very practical meaning in aspects of high coal production and effect development in coal mine and increasement in the recovery ratio in Acoal mine.