DOI: 10.11799/ce201705018
Study on CO2 gas-phase fracturing for coal seam roof weakening in fully mechanized top coal caving face
LU Guang-yin
Abstract：In order to study the application of CO2 gas-phase fracturing technology in coal seam roof weakening,the technical features of roof fracturing was analyzed and engineering experiments were conducted in N3-1 working face of Changcun Coal Mine.The effect of fracturing was observed,through the change of pressure monitoring system of fully mechanized mining support,the explosion proof camera and drilling peep instrument.The results show that the effect of CO2 gas-phase fracturing technology was significant,the distance of first weighting step of the working face was 18 meters advanced compared with the average of the mine.The safety factor was higher compared with traditional explosive technology.This technology provides references for safe mine in fully mechanized caving face in other coal mines.
Keywords：gas-phase fracturingfully mechanized top coal caving faceroof weakeningthe first weightingsafe mining
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 58-59,62 )