In the view of the problems of frequent gas overrun,low production efficiency and big safety risks in M coal seam in Guandi Coal Mine,a comprehensive gas control scheme was designed.The measures and methods of gas control in the coal seam,adjacent coal seam and gob area were analyzed.Finally,the industrial test was carried out in M coal seam in Guandi Coal Mine.The test results show that the designed and realized comprehensive gas control scheme can stabilize the gas volume fraction in the upper corner of the coal seam at 0.22%,the gas volume fraction in the air return roadway at 0.17%,and the average production of raw coal increased from 1 050 t/d to 1 980 t/d,effectively solving the problem of frequent gas exceedance in the coal seam,improving production efficiency and reducing safety hazards.
关键词
瓦斯抽采/瓦斯赋存/瓦斯治理/上隅角/采空区
Key words
gas extraction/gas occurrence/gas control/upper corner/goaf
维普
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