Research on Gas Traceability Technology for Stereoscopic Joint Extraction and Mixed Source Gas in Outburst Coal Seam Groups
The occurrence and distribution of outburst coal seams in China are widespread,and the roadway stereoscopic joint extraction in floor strata is the main method for gas control in the coal roadway belt area of outburst coal seams.In order to solve the problem of mixed source gas traceability in the stereoscopic extraction,taking Shiqiao Coal Mine as the engineering background,the single control variable method was used to trace the gas source in the group holes of coal seams 4,5,and 9.Under the dynamic conditions of extraction,the cumulative gas source ratios of coal seams 4,5,and 9 for 14 days were determined to be 42.38,1.47,and 56.15%,respectively.The cumulative gas source ratios for 28 days were 43.55,3.48,and 52.97%,and the cumulative gas source ratios for 38 days were 45.32,2.14,and 52.54%,respectively.In order to verify the reliability of the gas traceability ratio in group control,a single hole measurement method was used to investigate and verify the gas traceability of coal seams.After verification,the cumulative gas source ratios of coal seams 4,5,and 9 were 40.08%,1.94%,and 57.98%,respectively.After verification and analysis,the deviation is controlled within 10%,indicating that the comprehensively determined proportion of gas sources is true and reliable,which has certain reference significance for gas measurement in similar mine joint extraction.
stereoscopic joint extractionsingle control variable methoddynamic investigation of group poressingle hole verificationtraceability of mixed source gas
万方数据
维普
