Full life cycle prevention and control measures and their application of close distance coal seams passing through overlying coal pillar
Aiming at the difficult problem of roof control when the 22-upper-104-1 fully mechanized mining face passes through the overlying 12102 auxiliary transportation roadway pillar in Shigetai Coal Mine,the mechanism of the dynamic pressure disaster of the lower working face by the upper coal pillar was analyzed in detail,the full life cycle control measures of"roof weakening before mining and whole-process control during mining"were proposed and applied in production.According to the rock pressure data collected on the site,the control measures could effectively control and avoid the occurrence of strong mine pressure and shorten the roof weighting step,thus avoiding roof safety accidents and related secondary disasters in the working face.
close distance coal seamsfull life cycleoverburden movementdynamic mine pressure
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