Analysis of Gas Drainage Effect during Mining of Fully Mechanized Caving Face of Extra-thick Coal Seam
ZHANG Zhigang
LIU Jun
ZHENG Sanlong
Abstract：To aim at the gas control problem in the mining process of 5754502 working face in Wudong Coal Mine, analysis was made in this paper on the gas drainage by the buried pipes in the gob and the high-location boreholes along roof strike in the mining period of the face according to the actual gas drainage data. The results showed that the gas drainage by both the buried pipes in the gob and the high-location boreholes along roof strike can remarkably reduce the gas concentration in the air-return way and at the upper corner angle of the face, especially the gas drainage by buried pipes in the gob, it can make the gas in the face to be under effective control. Through the analysis on the length of the buried pipe in the gob, it was concluded that the reasonable depth of the buried pipe in the gob of 45# coal seam face should be 10 to 35 m, it should not be more than 35 m and not be more than 100 m at most so as to facilitate the fire control in the gob.
Keywords：extra-thick coal seamfully mechanized caving facepipeline buried in gobhigh-location boreholegas drainageeffectiveness analysis
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：5( 63-66,70 )