Research on Reasonable Pre-draining Period of Coal-seam Gas
LI shugang
LI Zhiliang
LIN Haifei
ZHAO Pengxiang
LI Li
Abstract：A rational gas Pre-drainage model was established by analyzing the influence factors of the borehole gas drainage effect and according to the measured result of the rational drainage radius in the working face in a mine in Shanxi Province. Based on the actual conditions of the face,the Pre-drainage rate and time in different borehole sPacing were obtained. It was determined that the reasonable borehole sPacing in this face was 2. 5~3. 0 m and the reasonable Pre-PumPing time was 210 d when the alternative mining,drainage cost and other factors were taken into consideration,this thus Provided a reference for the determination of the reasonable borehole sPacing and Pre-PumPing time in the same seam mining in this mine.
Keywords：gas drainageborehole sPacingreasonable Pre-draining Perioddrainage effect
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 23-25,32 )