Abstract
The paper main introduce the principle of integrated pillarlesss coal production and methane extraction technology, the gas flow characteristics of stope and the coal production and methane extraction technology. In order to solve the mine production replacement problems under the high stress and high gas conditions in the deep mine, integrated pillarlesss gob-side entry retaining in return airway and "Y" type ventilation industrial trial were conducted. The integrated pillarlesss entry retaining could keep the road in a support pressure reduced area. The back filled mass could be effective to isolate the gas in the goaf and the application of "Y" type ventilation could highly reduce the gas content in the top corner.
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