Abstract:

This paper analyzed and stated the necessity of the gas drainage and control for NO 18201 coal mining face in Baolunyuan mine. Combined with its coal mining technology,certain conditions and Roof type of coal mining face ,Analysis to determine the parameters of high drilling. Practice for application in NO 18201 coal mining face in Baolunyuan mine,The results showed that:After using high drilling for gas drainage the amount of gas drainage is 1.75 ~ 3.39m 3 / min after the use of this technology.The amount of ventilation air methane is 1.46～2.224 m3/min,The Quantity of Air Current declined from 1030 m3/min in march to 790m3/min in July.The average amount of gas drainage is 2.09 m3/min. The average amount of gas consistence is 13.8 m3/min,The average amount of gas drainage ratio reaches 50.6% , gas consistence at the upper corners declined from 1.35% in march to 0.53% in July,To solve the problem of gas transfinite in upper corner.

Key words: high—position drilling, upper corner gas, Gob, gas drainage