Study on Gas Emission Law and Gas Drainage Plan of Protective Seam with Close Distance to Other seams in Multi Seams

In order to ensure the production safety of the coal mining face in a protective seam with a close distance to other seams,an individual resource prediction method was applied to the analysis on the gas emission law of the first coal mining face in Luozhou Mine.The study showed that the gas emission form the mining seam was taken 16 %,the gas emission from the top neighboring seam was taken 50.7% and the gas emission from the below neighboring seam was taken 32.4%.Base on the circumstances,an optimized design was conducted on the gas drainage plan of Luozhou Mine,the paper proposed that the in-seam parallel inclined cross boreholes in mining seam and the pipeline buried in the goaf were applied to the first coal mining face for the gas drainage and with the ventilation for the gas dilution,boreholes in the high level gateway were applied to the top neighboring seam for the high content gas drainage within the circular crack ring and the floor through bed boreholes were applied to the below neighboring seam for the pressure released desorbed gas in the floor heave crack zone and floor heave deformation zone.With the pressure released mining in the protective seam with the pressure released enhanced gas drainage method,the gas content in the pressure released seam was reduced and the coal and gas outburst danger of the protected seam was eliminated.