Abstract: The nose reproduced chamber of Hongqingliang Mine is weakly cemented soft rock large chamber connected with coal bunker and driving chambers; they have complicated structure, big cross section span and difficult to support. In this paper, the stability of chamber surrounding rock and supporting structure of the supported nose reproduced chamber was analyzed by FLAC^3D, the results show that: the displacement of the roof connection area surrounding rock of the nose reproduced chamber and coal bunker and driving chambers was bigger, need to strengthen the intensity of roof support; the thickness of two large plastic area of theirs sides was larger, the sides' anchor force was obvious; lining normal stress of coal bunker passing through weak seam section and coal bunker kneck is bigger; mine pressure monitoring points was set on the large deformation regions and weak points of supporting structure to monitor the stability of nose reproduced chamber surrounding rock and take timely remedial measures.