Journal of Mining & Safety Engineering ›› 2013, Vol. 30 ›› Issue (1): 19-22.

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Roof control technology of the intersection of large section roadway during shrinking face

  

  • Received:2012-03-17 Online:2013-01-15 Published:2013-01-17

Abstract: Based on the shrinking face project and roof support problem of intersection of roadway at fully mechanized top coal caving face in the No.2 Deep Mine of Pingshuo,the stress and displacement fields of surrounding rock of the roadway intersection are calculated and analyzed by FLAC3D three-dimensional numerical simulation software. By compared with site monitoring data,the rule of the intersection of roadway roof’s variation are obtained and analyzed. The result shows that the roadway height of intersection could not be ensured in the present support condition. Therefore,the roof of in-tersection should be reinforced to meet the security of support. After reinforced supporting,the roof deformation has been effectively controlled,which could ensure the roadway height of intersection during shrinking face.

Key words:  , shrinking face;intersection;large section;roof control;numerical simulation