Optimization and Application of Excavation Support Design Under Two Layered Goaf
The 23lower607 eastern transportation roadway in Chaili Coal Mine is excavated along the floor in the 3lower coal.The 3 upper coal is fully mined,and the traditional support process is the Ⅰ-shaped steel framed shed support.In view of the adoption of Ⅰ-shaped steel framed shed support process,during the mining period,the deformation amount of the Ⅰ-shaped steel support roof side is large,and the maintenance of the two roadways is difficult,which needs to be carried out by the repair area team for a long time to lift the roof and expand the side,the mining speed is slow and the safety is low and other situations.According to the uneven thickness of the gangue in this section of the roadway,during the excavation period,Chaili Coal Mine adopts four effective and reliable support methods:anchor net support,alternate conducting anchor net support and framed shed support,anchor net framed shed composite support,and framed shed support.After implementation,comparing with effects of other roadways during excavation and mining period,effective support during mining is achieved,reaching the goal of fast excavation and cost reduction.The application effect is good and has replicability for promotion.
万方数据
维普
