Control Technology of Abnormal Gas Emission During Backout Caving Period at 2560 Working Face of Xinzhi Coal Mine
Abstract：After mining,the gas of 2560 coalface has been relatively stable（face gas concentration：0.15%,upper entry corner gas concentration： 0.55%,return air gas concentration：0.20%）.With adjusting the ventilation system of 2560 coalface for safety retracement,but gas emission became abnormal after adjusting.The gas of down-corner angle had reached 8%,seriously affected the safety production.Through deeply analyzing the gas monitoring data,the surface atmospheric pressure monitoring data,the ventilation map of pre-and post ventilation system adjustment,the essential reasons for abnormal gas emission and corresponding measures were achieved,which ensure the safety retracement of 2560 coalface.
Keywords：working facebackout cavinggasabnormal emissionventilation system dadjustmentcontrol technology
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 25-27 )