Test and Application of "One Lane for Two Uses" Based on Roof Roadway of Working Face
ZHANG Ming
Abstract：In order to prevent coal and gas outburst and the gas overrun in the working face in the development of coal roadway, the roof crossing boreholes were drilled for strip gas pre-drainage in the coal roadway and the roof roadway was taken as the high-location roadway for gas drainage. The test and application results in 122908 working face in Enhong Mine showed that the gas drainage by roof crossing holes can effectively eliminate the outburst hazard in the heading face of coal roadway, and the gas content can be basically controlled below 8 m3/t;the driving footage increased from an average of less than 30 m/month to an average of 48 m/month, the month footage increased by 60%;the gas concentration drained by the high-location roadway during coal mining was 10% to 17%, the gas drainage volume was 2. 32 to 3. 56 m3/min, and the gas concentration at the upper corner angle was below 1%. Through the optimization design, the purpose of"one lane for two uses" of the roof roadway was achieved.
Keywords：gas drainageroof roadwaystrip gas pre-draining by coal roadwayhigh-location gas drainage roadwayone lane for two uses
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 78-80,98 )