Coordinative safety and high efficient coal and gas mining technology in underground coal mine with depth of 1 000 m

Based on a cordinative safety and high eficient coal and gas mining in Ji15-31010 coal mining faceof a mine with a depth ofl 0D m of No.12 Mine inPingsdingshan Tian an Ccal Company Limited as a cae,an upper protective mining technology of an utra thin seam was provided and implemened.Agas drinages fom the pressure released gas inJi14 seam of the upperthin seam.the gasin the goaf and thegasin J 15 mining sean were individual conducted. The prctice resulsshowed that based on the combination caculation ofJi14 and dJi15seams the average pure gas volume of the gas drainage was 8.5 m31'min,the average puregas of te ventlation gas was 4.03 m13/ min,the pure volume of the total ventilaion gas was 2695 .3 m3.the pure volume ofthe o tal as drainagegas was 5 5340 mt.the gas emission volumne was 8 223 420 m3 the gas drainage rate was 65.94% in average and the average gas olume fracion of thear reuning fiow inJ15-31010 seamwas 0.167%.A coordinative safety and high eficient coal and gas mining was realized in the outburst seam of the mine with a dephof 1 .赛 m.The study resuts oud have reference significances to the gas control and the coal and gas coordinative safety and high etficient mining under the mine with the timila conditins.