Design and application of grouting anchor cable supporting and unit bracket supporting for roof of Shaqu No.2 Coal Mine
Combined with the geological conditions and working face conditions of Shaqu No.2 Coal Mine,this paper designed the 110 construction method hollow grouting anchor cable supporting and unit bracket temporary supporting of the No.5302 working face of No.5 coal seam of Shaqu No.2 Coal Mine through field investigation,and carried out the practice on site.The field results showed that the temporary supporting technology of grouting anchor cable supporting and unit bracket was adopted after the roof cutting and pressure re-lief.The displacement of roof and floor and the displacement of two sides of roadway gradually decreased and tended to be stable within the range of 0～200 m from the open-off cut.The overall subsidence of the roof was not large,and the floor heave was large.The incremental movement of the two sides in the first 200 meters of the retained roadway gradually decreased,and the roadway gradually entered the stable stage,meeting the requirements of roadway retention,which verified the reliability of the support technology proposed in this paper.
110 construction methodgrouting anchor cable supportingunit bracket supportingroof cutting and pressure relief
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维普
