Experimental Study of Hydraulic Fracturing Technology in Outburst Coal Seam with Low Permeability in Datong No. 1 Mine
PANG Cheng
GONG Jiebing
Abstract：With the increase of mining depth of the mine, the gas permeability coefficient of coal seams reduced gradually, which seriously threated to the safe production of the mine. To counter to the problems of low gas permeability and difficult gas drainage of No. 7 and 8 coal seams in Datong No. 1 Mine, the high-pressure hydraulic fracturing technology was analyzed and studied in this paper. In the field tests, analysis and implementation were made on the drilling technology of hydraulic fracturing holes, the hole arrangement, the hole sealing technology and the safety measures, and investigation was conducted on the influence scope and the effect of hydraulic fracturing measure. The results showed that the gas permeability of coal seams, the average gas drainage concentration and the pure gas drainage volume significantly increased, the drainage time decreased and the coal and gas outburst hazard reduced.
Keywords：hydraulic fracturinggas drainagecoal seam with low gas permeabilityfracturing boreholeeffect
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( 53-56 )